{"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":"AS401172","resource_type":"asn","page":"https://rirtracker.com/asn/401172/","statistics_now":{"registry":"ARIN","status":"reserved"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[{"resource_type":"asn","start_key":"00000000000000000000000000061f14","end_key":"00000000000000000000000000061f14","captured_at":"2026-11-11T18:21:50+00:00","reason":"24h","authoritative_rir":"ARIN","rdap_url":"https://rdap.arin.net/registry/autnum/401172","error":"not registered (RDAP 404)"},{"resource_type":"asn","start_key":"00000000000000000000000000061f14","end_key":"00000000000000000000000000061f14","captured_at":"2026-11-10T18:21:38+00:00","reason":"first","authoritative_rir":"ARIN","rdap_url":"https://rdap.arin.net/registry/autnum/401172","error":"not registered (RDAP 404)"}],"transfers":[],"events":[{"event_id":"4940f4a621dd8c58","registry":"ARIN","report_date":"2026-11-09","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS401172","start":401172,"end":401172,"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":true,"classifier_version":"1.4.0","classified_at":"2026-11-10T18:27:02+00:00","page":"https://rirtracker.com/asn/401172/#e-4940f4a621dd8c58","report_page":"https://rirtracker.com/arin/reports/2026-11-09/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/401172.json","observed":"AS401172 assigned on 2026-11-09, reserved on 2026-11-10","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":"2027-05-09","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 2024-06-13) on 2026-11-08 and reserved on 2026-11-10. 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 2027-05-09. 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/delegated-arin-extended-20261110","retrieved_at":"2026-11-10T18:17:13+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS401172 assigned on 2026-11-09, reserved on 2026-11-10"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261108","retrieved_at":"2026-11-08T18:17:14+00:00","summary":"ARIN delegated statistics 2026-11-08 (produced 2026-11-08T14:00:21+00:00), before the report: assigned (dated 2024-06-13)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261110","retrieved_at":"2026-11-10T18:17:13+00:00","summary":"ARIN delegated statistics 2026-11-10 (produced 2026-11-10T14:00:21+00:00), after the report: reserved"}]},{"event_id":"0931e919406efec7","registry":"ARIN","report_date":"2024-06-13","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS401172","resource_type":"asn","resource":"AS401172","start":401172,"end":401172,"classification":"APPARENT_NEW_ISSUANCE","classification_label":"Apparent new issuance","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":"2026-10-13T23:54:06+00:00","page":"https://rirtracker.com/asn/401172/#e-0931e919406efec7","report_page":"https://rirtracker.com/arin/reports/2024-06-13/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/401172.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2024-06-12 and assigned (dated 2024-06-13) on 2024-06-14. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2024-June/005662.html","retrieved_at":"2026-10-12T18:42:38+00:00","summary":"ARIN-Issued report for 2024-06-13: \"Add AS401172\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240612.gz","retrieved_at":"2026-10-12T23:41:28+00:00","summary":"ARIN delegated statistics 2024-06-12 (produced 2024-06-12T13:00:47+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240614.gz","retrieved_at":"2026-10-12T23:41:45+00:00","summary":"ARIN delegated statistics 2024-06-14 (produced 2024-06-14T13:00:46+00:00), after the report: assigned (dated 2024-06-13)"}]}],"classification_history":{"4940f4a621dd8c58":[{"raw_change_id":580118,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-11-10T18:27:02+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 2024-06-13) on 2026-11-08 and reserved on 2026-11-10. 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 2027-05-09. 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."}],"0931e919406efec7":[{"raw_change_id":187703,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:02:28+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2024-06-12 and assigned (dated 2024-06-13) on 2024-06-14. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":187703,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:44+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2024-06-12 and assigned (dated 2024-06-13) on 2024-06-14. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":187703,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:36+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2024-06-12 and assigned (dated 2024-06-13) on 2024-06-14. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":187703,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:06+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2024-06-12 and assigned (dated 2024-06-13) on 2024-06-14. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}]},"arin_statistics_now":{"status":"reserved"}}