{"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":"AS20211","resource_type":"asn","page":"https://rirtracker.com/asn/20211/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2025-12-17)"},"current_holder":{"rir":"ARIN","org":"MITTERA GROUP, INC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":2076,"date":"2020-05-06T20:56:07Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Henry Wurst, Inc.","recipient_org":"MITTERA GROUP, INC","range":"AS20211","log":"ARIN"}],"events":[{"event_id":"641b4ce3d6827826","registry":"ARIN","report_date":"2025-12-17","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS20211","resource_type":"asn","resource":"AS20211","start":20211,"end":20211,"classification":"RESTORED","classification_label":"Restored to the same holder","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:41+00:00","page":"https://rirtracker.com/asn/20211/#e-641b4ce3d6827826","report_page":"https://rirtracker.com/arin/reports/2025-12-17/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/20211.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. The tracker saw it removed from registration on 2025-09-08 (100 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2025-December/006213.html","retrieved_at":"2026-10-12T18:43:16+00:00","summary":"ARIN-Issued report for 2025-12-17: \"Add AS20211\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251216.gz","retrieved_at":"2026-10-13T00:11:56+00:00","summary":"ARIN delegated statistics 2025-12-16 (produced 2025-12-16T14:00:46+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251218.gz","retrieved_at":"2026-10-13T00:12:01+00:00","summary":"ARIN delegated statistics 2025-12-18 (produced 2025-12-18T14:00:47+00:00), after the report: assigned (dated 2025-12-17)"}]},{"event_id":"70d8af582716ef68","registry":"ARIN","report_date":"2025-12-17","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS20211","resource_type":"asn","resource":"AS20211","start":20211,"end":20211,"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":"2026-10-13T23:54:41+00:00","page":"https://rirtracker.com/asn/20211/#e-70d8af582716ef68","report_page":"https://rirtracker.com/arin/reports/2025-12-17/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/20211.json","explanation":"ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS20211. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2025-December/006213.html","retrieved_at":"2026-10-12T18:43:16+00:00","summary":"ARIN-Issued report for 2025-12-17: \"Remove AS20211\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251216.gz","retrieved_at":"2026-10-13T00:11:56+00:00","summary":"ARIN delegated statistics 2025-12-16 (produced 2025-12-16T14:00:46+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251218.gz","retrieved_at":"2026-10-13T00:12:01+00:00","summary":"ARIN delegated statistics 2025-12-18 (produced 2025-12-18T14:00:47+00:00), after the report: assigned (dated 2025-12-17)"}]},{"event_id":"e20a567aeb8e3482","registry":"ARIN","report_date":"2025-09-08","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS20211","start":20211,"end":20211,"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":"2026-10-14T00:13:37+00:00","page":"https://rirtracker.com/asn/20211/#e-e20a567aeb8e3482","report_page":"https://rirtracker.com/arin/reports/2025-09-08/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/20211.json","observed":"AS20211 assigned on 2025-09-08, reserved on 2025-09-09","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":"2026-03-08","availability_statement":"Possible reissue candidate after this date; not confirmed available","released_sooner_since":"2024-07-01"},"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 2001-04-06) on 2025-09-07 and reserved on 2025-09-09. 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 2026-03-08. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250909.gz","retrieved_at":"2026-10-13T00:06:31+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS20211 assigned on 2025-09-08, reserved on 2025-09-09"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250907.gz","retrieved_at":"2026-10-13T00:06:25+00:00","summary":"ARIN delegated statistics 2025-09-07 (produced 2025-09-07T13:00:51+00:00), before the report: assigned (dated 2001-04-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250909.gz","retrieved_at":"2026-10-13T00:06:31+00:00","summary":"ARIN delegated statistics 2025-09-09 (produced 2025-09-09T13:00:50+00:00), after the report: reserved"}]},{"event_id":"2d852cbf7ebe47d0","registry":"ARIN","report_date":"2020-05-06","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS20211","start":20211,"end":20211,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Henry Wurst, Inc.","recipient_organization":"MITTERA GROUP, INC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:49+00:00","page":"https://rirtracker.com/asn/20211/#e-2d852cbf7ebe47d0","report_page":"https://rirtracker.com/arin/reports/2020-05-06/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/20211.json","observed":"Merger/acquisition: Henry Wurst, Inc. (ARIN) to MITTERA GROUP, INC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Henry Wurst, Inc. (ARIN) to MITTERA GROUP, INC (ARIN) on 2020-05-06 20:56 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.","evidence":[{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-13T13:57:20+00:00","summary":"Transfer log: MERGER_ACQUISITION on 2020-05-06 20:56 UTC, Henry Wurst, Inc. (ARIN) to MITTERA GROUP, INC (ARIN); resources moved: AS20211"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200505.gz","retrieved_at":"2026-10-12T22:23:28+00:00","summary":"ARIN delegated statistics 2020-05-05 (produced 2020-05-05T14:00:13+00:00), before the report: assigned (dated 2001-04-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200507.gz","retrieved_at":"2026-10-12T22:23:33+00:00","summary":"ARIN delegated statistics 2020-05-07 (produced 2020-05-07T14:00:13+00:00), after the report: assigned (dated 2001-04-06)"}]}],"classification_history":{"641b4ce3d6827826":[{"raw_change_id":198129,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:08:53+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. The tracker saw it removed from registration on 2025-09-08 (100 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction."},{"raw_change_id":198129,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:11+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. The tracker saw it removed from registration on 2025-09-08 (100 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction."},{"raw_change_id":198129,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:06+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. The tracker saw it removed from registration on 2025-09-08 (100 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction."},{"raw_change_id":198129,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:41+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. The tracker saw it removed from registration on 2025-09-08 (100 days earlier), and it is back with the same holder record it had before, so it went back to its previous holder rather than to a new one: most likely a suspension lifted, a reinstatement or a correction."}],"70d8af582716ef68":[{"raw_change_id":198128,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:08:53+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS20211. The issuance is explained on that line."},{"raw_change_id":198128,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:11+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS20211. The issuance is explained on that line."},{"raw_change_id":198128,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:06+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS20211. The issuance is explained on that line."},{"raw_change_id":198128,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:41+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2025-12-16 and assigned (dated 2025-12-17) on 2025-12-18. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS20211. The issuance is explained on that line."}],"e20a567aeb8e3482":[{"raw_change_id":485290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:17:29+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 2001-04-06) on 2025-09-07 and reserved on 2025-09-09. 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 2026-03-08. This does not confirm availability."},{"raw_change_id":485290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:24:01+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 2001-04-06) on 2025-09-07 and reserved on 2025-09-09. 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 2026-03-08. This does not confirm availability."},{"raw_change_id":485290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:08:11+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 2001-04-06) on 2025-09-07 and reserved on 2025-09-09. 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 2026-03-08. This does not confirm availability."},{"raw_change_id":485290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:13:37+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 2001-04-06) on 2025-09-07 and reserved on 2025-09-09. 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 2026-03-08. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner."}],"2d852cbf7ebe47d0":[{"raw_change_id":560417,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:49+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Henry Wurst, Inc. (ARIN) to MITTERA GROUP, INC (ARIN) on 2020-05-06 20:56 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it."}]},"arin_statistics_now":{"status":"assigned (dated 2025-12-17)"}}