{"classifier_version":"1.4.0","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by ARIN, the RIPE NCC, APNIC, LACNIC, AFRINIC, the Number Resource Organization (NRO), or any other Regional Internet Registry. Classifications and hold-expiration dates are evidence-based interpretations and do not constitute confirmation that a resource is available for issuance or transfer.","resource":"AS21531","resource_type":"asn","page":"https://rirtracker.com/asn/21531/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2023-09-20)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"bf9f4f853dc8f4e8","registry":"ARIN","report_date":"2023-09-20","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS21531","resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:50+00:00","page":"https://rirtracker.com/asn/21531/#e-bf9f4f853dc8f4e8","report_page":"https://rirtracker.com/arin/reports/2023-09-20/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2023-09-19 and assigned (dated 2023-09-20) on 2023-09-21. The tracker saw this range released from hold on 2023-09-19 (AS21531), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2023-09-19: Remove AS21531), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-September/005395.html","retrieved_at":"2026-10-12T18:42:19+00:00","summary":"ARIN-Issued report for 2023-09-20: \"Add AS21531\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230919.gz","retrieved_at":"2026-10-12T23:27:16+00:00","summary":"ARIN delegated statistics 2023-09-19 (produced 2023-09-19T13:00:14+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230921.gz","retrieved_at":"2026-10-12T23:27:21+00:00","summary":"ARIN delegated statistics 2023-09-21 (produced 2023-09-21T13:00:15+00:00), after the report: assigned (dated 2023-09-20)"}]},{"event_id":"c773e4de068a1688","registry":"ARIN","report_date":"2023-09-19","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS21531","resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"HOLD_RELEASED","classification_label":"Released from hold (ARIN lists it as 'available')","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"ARIN's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:50+00:00","page":"https://rirtracker.com/asn/21531/#e-c773e4de068a1688","report_page":"https://rirtracker.com/arin/reports/2023-09-19/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","explanation":"ARIN's statistics show it reserved on 2023-09-18 and available on 2023-09-20. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2022-09-05, 379 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2023-09-20: Add AS21531), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-September/005394.html","retrieved_at":"2026-10-12T18:42:19+00:00","summary":"ARIN-Issued report for 2023-09-19: \"Remove AS21531\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230918.gz","retrieved_at":"2026-10-12T23:27:13+00:00","summary":"ARIN delegated statistics 2023-09-18 (produced 2023-09-18T13:00:14+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230920.gz","retrieved_at":"2026-10-12T23:27:18+00:00","summary":"ARIN delegated statistics 2023-09-20 (produced 2023-09-20T13:00:13+00:00), after the report: available"}]},{"event_id":"4ae810ba791123e0","registry":"ARIN","report_date":"2022-09-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:40+00:00","page":"https://rirtracker.com/asn/21531/#e-4ae810ba791123e0","report_page":"https://rirtracker.com/arin/reports/2022-09-05/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","observed":"AS21531 assigned on 2022-09-05, reserved on 2022-09-06","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_months":6,"estimated_hold_end":"2023-03-05","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2018-12-14) on 2022-09-04 and reserved on 2022-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2023-03-05. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220906.gz","retrieved_at":"2026-10-12T23:07:18+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS21531 assigned on 2022-09-05, reserved on 2022-09-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220904.gz","retrieved_at":"2026-10-12T23:07:13+00:00","summary":"ARIN delegated statistics 2022-09-04 (produced 2022-09-04T13:00:10+00:00), before the report: assigned (dated 2018-12-14)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220906.gz","retrieved_at":"2026-10-12T23:07:18+00:00","summary":"ARIN delegated statistics 2022-09-06 (produced 2022-09-06T13:00:10+00:00), after the report: reserved"}]},{"event_id":"e451c4e2c3a75f37","registry":"ARIN","report_date":"2018-12-14","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS21531","resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:22+00:00","page":"https://rirtracker.com/asn/21531/#e-e451c4e2c3a75f37","report_page":"https://rirtracker.com/arin/reports/2018-12-14/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. The tracker saw this range removed from registration on 2017-10-10 (AS21531), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-December/003656.html","retrieved_at":"2026-10-12T18:40:18+00:00","summary":"ARIN-Issued report for 2018-12-14: \"Add AS21531\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181213.gz","retrieved_at":"2026-10-12T21:57:04+00:00","summary":"ARIN delegated statistics 2018-12-13 (produced 2018-12-13T06:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181215.gz","retrieved_at":"2026-10-12T21:57:09+00:00","summary":"ARIN delegated statistics 2018-12-15 (produced 2018-12-15T06:00:12+00:00), after the report: assigned (dated 2018-12-14)"}]},{"event_id":"cf88b84de8f373bf","registry":"ARIN","report_date":"2018-12-14","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS21531","resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:22+00:00","page":"https://rirtracker.com/asn/21531/#e-cf88b84de8f373bf","report_page":"https://rirtracker.com/arin/reports/2018-12-14/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","explanation":"ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21531. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-December/003656.html","retrieved_at":"2026-10-12T18:40:18+00:00","summary":"ARIN-Issued report for 2018-12-14: \"Remove AS21531\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181213.gz","retrieved_at":"2026-10-12T21:57:04+00:00","summary":"ARIN delegated statistics 2018-12-13 (produced 2018-12-13T06:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181215.gz","retrieved_at":"2026-10-12T21:57:09+00:00","summary":"ARIN delegated statistics 2018-12-15 (produced 2018-12-15T06:00:12+00:00), after the report: assigned (dated 2018-12-14)"}]},{"event_id":"fbc35c0b3f436d1a","registry":"ARIN","report_date":"2017-10-10","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS21531","start":21531,"end":21531,"classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:03:31+00:00","page":"https://rirtracker.com/asn/21531/#e-fbc35c0b3f436d1a","report_page":"https://rirtracker.com/arin/reports/2017-10-10/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21531.json","observed":"AS21531 assigned on 2017-10-10, reserved on 2017-10-11","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_months":6,"estimated_hold_end":"2018-04-10","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2001-05-18) on 2017-10-09 and reserved on 2017-10-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2018-04-10. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171011.gz","retrieved_at":"2026-10-12T21:35:37+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS21531 assigned on 2017-10-10, reserved on 2017-10-11"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171009.gz","retrieved_at":"2026-10-12T21:35:32+00:00","summary":"ARIN delegated statistics 2017-10-09 (produced 2017-10-09T05:10:38+00:00), before the report: assigned (dated 2001-05-18)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171011.gz","retrieved_at":"2026-10-12T21:35:37+00:00","summary":"ARIN delegated statistics 2017-10-11 (produced 2017-10-11T05:11:30+00:00), after the report: reserved"}]}],"classification_history":{"bf9f4f853dc8f4e8":[{"raw_change_id":183474,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:02+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-09-19 and assigned (dated 2023-09-20) on 2023-09-21. The tracker saw this range released from hold on 2023-09-19 (AS21531), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2023-09-19: Remove AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183474,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:33+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-09-19 and assigned (dated 2023-09-20) on 2023-09-21. The tracker saw this range released from hold on 2023-09-19 (AS21531), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2023-09-19: Remove AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183474,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:23+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-09-19 and assigned (dated 2023-09-20) on 2023-09-21. The tracker saw this range released from hold on 2023-09-19 (AS21531), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2023-09-19: Remove AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183474,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:50+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-09-19 and assigned (dated 2023-09-20) on 2023-09-21. The tracker saw this range released from hold on 2023-09-19 (AS21531), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2023-09-19: Remove AS21531), so the before-and-after statistics may include it."}],"c773e4de068a1688":[{"raw_change_id":183447,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:01+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-09-18 and available on 2023-09-20. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2022-09-05, 379 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2023-09-20: Add AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183447,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:32+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-09-18 and available on 2023-09-20. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2022-09-05, 379 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2023-09-20: Add AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183447,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:23+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-09-18 and available on 2023-09-20. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2022-09-05, 379 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2023-09-20: Add AS21531), so the before-and-after statistics may include it."},{"raw_change_id":183447,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:50+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2023-09-18 and available on 2023-09-20. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2022-09-05, 379 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2023-09-20: Add AS21531), so the before-and-after statistics may include it."}],"4ae810ba791123e0":[{"raw_change_id":432863,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:53:22+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2018-12-14) on 2022-09-04 and reserved on 2022-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2023-03-05. This does not confirm availability."},{"raw_change_id":432863,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:20:53+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2018-12-14) on 2022-09-04 and reserved on 2022-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2023-03-05. This does not confirm availability."},{"raw_change_id":432863,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:04:49+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2018-12-14) on 2022-09-04 and reserved on 2022-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2023-03-05. This does not confirm availability."},{"raw_change_id":432863,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:40+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2018-12-14) on 2022-09-04 and reserved on 2022-09-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2023-03-05. This does not confirm availability."}],"e451c4e2c3a75f37":[{"raw_change_id":157636,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:43:05+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. The tracker saw this range removed from registration on 2017-10-10 (AS21531), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":157636,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:26+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. The tracker saw this range removed from registration on 2017-10-10 (AS21531), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":157636,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:09+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. The tracker saw this range removed from registration on 2017-10-10 (AS21531), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":157636,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:22+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. The tracker saw this range removed from registration on 2017-10-10 (AS21531), so it appears to have been issued again from ARIN's pool."}],"cf88b84de8f373bf":[{"raw_change_id":157629,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:43:05+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21531. The issuance is explained on that line."},{"raw_change_id":157629,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:26+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21531. The issuance is explained on that line."},{"raw_change_id":157629,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:09+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21531. The issuance is explained on that line."},{"raw_change_id":157629,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:22+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2018-12-13 and assigned (dated 2018-12-14) on 2018-12-15. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21531. The issuance is explained on that line."}],"fbc35c0b3f436d1a":[{"raw_change_id":341784,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:15:34+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2001-05-18) on 2017-10-09 and reserved on 2017-10-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2018-04-10. This does not confirm availability."},{"raw_change_id":341784,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:15:48+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2001-05-18) on 2017-10-09 and reserved on 2017-10-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2018-04-10. This does not confirm availability."},{"raw_change_id":341784,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:59:20+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2001-05-18) on 2017-10-09 and reserved on 2017-10-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2018-04-10. This does not confirm availability."},{"raw_change_id":341784,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:03:31+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 2001-05-18) on 2017-10-09 and reserved on 2017-10-11. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2018-04-10. This does not confirm availability."}]},"arin_statistics_now":{"status":"assigned (dated 2023-09-20)"}}