{"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":"AS13520","resource_type":"asn","page":"https://rirtracker.com/asn/13520/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2024-02-01)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"ef617fe9aac3a843","registry":"ARIN","report_date":"2024-02-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS13520","resource_type":"asn","resource":"AS13520","start":13520,"end":13520,"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":"2026-10-13T23:53:57+00:00","page":"https://rirtracker.com/asn/13520/#e-ef617fe9aac3a843","report_page":"https://rirtracker.com/arin/reports/2024-02-01/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/13520.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2024-01-31 and assigned (dated 2024-02-01) on 2024-02-02. The tracker saw this range released from hold on 2024-01-31 (AS13520), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2024-01-31: Remove AS13520), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2024-February/005529.html","retrieved_at":"2026-10-12T18:42:29+00:00","summary":"ARIN-Issued report for 2024-02-01: \"Add AS13520\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240131.gz","retrieved_at":"2026-10-12T23:34:27+00:00","summary":"ARIN delegated statistics 2024-01-31 (produced 2024-01-31T14:00:43+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240202.gz","retrieved_at":"2026-10-12T23:34:32+00:00","summary":"ARIN delegated statistics 2024-02-02 (produced 2024-02-02T14:00:44+00:00), after the report: assigned (dated 2024-02-01)"}]},{"event_id":"8822bbdd208aff31","registry":"ARIN","report_date":"2024-01-31","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS13520","resource_type":"asn","resource":"AS13520","start":13520,"end":13520,"classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:57+00:00","page":"https://rirtracker.com/asn/13520/#e-8822bbdd208aff31","report_page":"https://rirtracker.com/arin/reports/2024-01-31/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/13520.json","explanation":"ARIN's statistics show it reserved on 2024-01-30 and assigned (dated 2024-02-01) on 2024-02-01. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2024-02-01: Add AS13520), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2024-January/005528.html","retrieved_at":"2026-10-12T18:42:27+00:00","summary":"ARIN-Issued report for 2024-01-31: \"Remove AS13520\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240130.gz","retrieved_at":"2026-10-12T23:34:25+00:00","summary":"ARIN delegated statistics 2024-01-30 (produced 2024-01-30T14:00:44+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240201.gz","retrieved_at":"2026-10-12T23:34:30+00:00","summary":"ARIN delegated statistics 2024-02-01 (produced 2024-02-01T14:00:43+00:00), after the report: assigned (dated 2024-02-01)"}]},{"event_id":"5587db5a7b85b4d9","registry":"ARIN","report_date":"2022-06-06","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS13520","start":13520,"end":13520,"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":"2026-10-14T00:09:20+00:00","page":"https://rirtracker.com/asn/13520/#e-5587db5a7b85b4d9","report_page":"https://rirtracker.com/arin/reports/2022-06-06/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/13520.json","observed":"AS13520 assigned on 2022-06-06, reserved on 2022-06-07","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":"2022-12-06","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 2015-01-09) on 2022-06-05 and reserved on 2022-06-07. 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 2022-12-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220607.gz","retrieved_at":"2026-10-12T23:02:37+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS13520 assigned on 2022-06-06, reserved on 2022-06-07"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220605.gz","retrieved_at":"2026-10-12T23:02:33+00:00","summary":"ARIN delegated statistics 2022-06-05 (produced 2022-06-05T13:00:13+00:00), before the report: assigned (dated 2015-01-09)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220607.gz","retrieved_at":"2026-10-12T23:02:37+00:00","summary":"ARIN delegated statistics 2022-06-07 (produced 2022-06-07T13:00:13+00:00), after the report: reserved"}]},{"event_id":"24aba3595b655aa6","registry":"ARIN","report_date":"2014-11-04","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS13520","start":13520,"end":13520,"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":"2026-10-14T00:00:11+00:00","page":"https://rirtracker.com/asn/13520/#e-24aba3595b655aa6","report_page":"https://rirtracker.com/arin/reports/2014-11-04/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/13520.json","observed":"AS13520 assigned on 2014-11-04, reserved on 2014-11-05","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":"2015-05-04","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 1999-06-28) on 2014-11-03 and reserved on 2014-11-05. 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 2015-05-04. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141105.gz","retrieved_at":"2026-10-12T20:43:33+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS13520 assigned on 2014-11-04, reserved on 2014-11-05"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141103.gz","retrieved_at":"2026-10-12T20:43:28+00:00","summary":"ARIN delegated statistics 2014-11-03 (produced 2014-11-03T06:03:55+00:00), before the report: assigned (dated 1999-06-28)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141105.gz","retrieved_at":"2026-10-12T20:43:33+00:00","summary":"ARIN delegated statistics 2014-11-05 (produced 2014-11-05T06:04:34+00:00), after the report: reserved"}]}],"classification_history":{"ef617fe9aac3a843":[{"raw_change_id":185350,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:01:02+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2024-01-31 and assigned (dated 2024-02-01) on 2024-02-02. The tracker saw this range released from hold on 2024-01-31 (AS13520), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2024-01-31: Remove AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185350,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:38+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2024-01-31 and assigned (dated 2024-02-01) on 2024-02-02. The tracker saw this range released from hold on 2024-01-31 (AS13520), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2024-01-31: Remove AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185350,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:29+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2024-01-31 and assigned (dated 2024-02-01) on 2024-02-02. The tracker saw this range released from hold on 2024-01-31 (AS13520), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2024-01-31: Remove AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185350,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:57+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2024-01-31 and assigned (dated 2024-02-01) on 2024-02-02. The tracker saw this range released from hold on 2024-01-31 (AS13520), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2024-01-31: Remove AS13520), so the before-and-after statistics may include it."}],"8822bbdd208aff31":[{"raw_change_id":185316,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:01:01+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2024-01-30 and assigned (dated 2024-02-01) on 2024-02-01. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2024-02-01: Add AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185316,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:38+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2024-01-30 and assigned (dated 2024-02-01) on 2024-02-01. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2024-02-01: Add AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185316,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:29+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2024-01-30 and assigned (dated 2024-02-01) on 2024-02-01. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2024-02-01: Add AS13520), so the before-and-after statistics may include it."},{"raw_change_id":185316,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:57+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2024-01-30 and assigned (dated 2024-02-01) on 2024-02-01. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2024-02-01: Add AS13520), so the before-and-after statistics may include it."}],"5587db5a7b85b4d9":[{"raw_change_id":428593,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:51:39+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 2015-01-09) on 2022-06-05 and reserved on 2022-06-07. 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 2022-12-06. This does not confirm availability."},{"raw_change_id":428593,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:20:36+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 2015-01-09) on 2022-06-05 and reserved on 2022-06-07. 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 2022-12-06. This does not confirm availability."},{"raw_change_id":428593,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:04:31+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 2015-01-09) on 2022-06-05 and reserved on 2022-06-07. 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 2022-12-06. This does not confirm availability."},{"raw_change_id":428593,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:20+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 2015-01-09) on 2022-06-05 and reserved on 2022-06-07. 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 2022-12-06. This does not confirm availability."}],"24aba3595b655aa6":[{"raw_change_id":291110,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:52:11+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 1999-06-28) on 2014-11-03 and reserved on 2014-11-05. 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 2015-05-04. This does not confirm availability."},{"raw_change_id":291110,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:57+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 1999-06-28) on 2014-11-03 and reserved on 2014-11-05. 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 2015-05-04. This does not confirm availability."},{"raw_change_id":291110,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:18+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 1999-06-28) on 2014-11-03 and reserved on 2014-11-05. 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 2015-05-04. This does not confirm availability."},{"raw_change_id":291110,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:11+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 1999-06-28) on 2014-11-03 and reserved on 2014-11-05. 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 2015-05-04. This does not confirm availability."}]},"arin_statistics_now":{"status":"assigned (dated 2024-02-01)"}}