{"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":"AS137578","resource_type":"asn","page":"https://rirtracker.com/asn/137578/","statistics_now":{"registry":"APNIC","status":"allocated (dated 2018-04-19)"},"current_holder":{"rir":"APNIC","org":null,"how":"APNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"3c4ac878567ee025","registry":"APNIC","report_date":"2024-07-30","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS137578","start":137578,"end":137578,"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 APNIC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:26+00:00","page":"https://rirtracker.com/asn/137578/#e-3c4ac878567ee025","report_page":"https://rirtracker.com/apnic/reports/2024-07-30/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/137578.json","observed":"AS137578 available on 2024-07-30, allocated on 2024-07-31","explanation":"No transfer record matches. APNIC's statistics show it available on 2024-07-30 and allocated (dated 2018-04-19) on 2024-07-31. The tracker saw it removed from registration on 2024-07-23 (7 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":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240731.gz","retrieved_at":"2026-10-13T01:14:49+00:00","summary":"Found by comparing APNIC's daily statistics: AS137578 available on 2024-07-30, allocated on 2024-07-31"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240730.gz","retrieved_at":"2026-10-13T01:14:34+00:00","summary":"APNIC delegated statistics 2024-07-30, before the change: available"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240731.gz","retrieved_at":"2026-10-13T01:14:49+00:00","summary":"APNIC delegated statistics 2024-07-31, after the change: allocated (dated 2018-04-19)"}]},{"event_id":"4de680120e31129b","registry":"APNIC","report_date":"2024-07-23","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"asn","resource":"AS137578","start":137578,"end":137578,"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":"2026-10-14T00:17:23+00:00","page":"https://rirtracker.com/asn/137578/#e-4de680120e31129b","report_page":"https://rirtracker.com/apnic/reports/2024-07-23/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/137578.json","observed":"AS137578 allocated on 2024-07-23, available on 2024-07-24","hold":{"hold_rule_source_url":"https://www.apnic.net/manage-ip/manage-resources/address-status","hold_rule_months":12,"estimated_hold_end":"2025-07-23","availability_statement":"Possible reissue candidate after this date; not confirmed available","hold_rule_observed":true},"explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2018-04-19) on 2024-07-23 and available on 2024-07-24. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned ASNs a year after the removal or later since 2014, so the tracker estimates the hold ends on 2025-07-23. That is what APNIC has done, not a rule it states. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240724.gz","retrieved_at":"2026-10-13T01:14:12+00:00","summary":"Found by comparing APNIC's daily statistics: AS137578 allocated on 2024-07-23, available on 2024-07-24"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240723.gz","retrieved_at":"2026-10-13T01:14:09+00:00","summary":"APNIC delegated statistics 2024-07-23, before the change: allocated (dated 2018-04-19)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240724.gz","retrieved_at":"2026-10-13T01:14:12+00:00","summary":"APNIC delegated statistics 2024-07-24, after the change: available"}]},{"event_id":"19eb74966f765404","registry":"APNIC","report_date":"2018-04-19","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS137578","start":137578,"end":137578,"classification":"UNRESOLVED","classification_label":"Unresolved change","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":"2026-10-14T00:07:14+00:00","page":"https://rirtracker.com/asn/137578/#e-19eb74966f765404","report_page":"https://rirtracker.com/apnic/reports/2018-04-19/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/137578.json","observed":"AS137578 not listed on 2018-04-19, allocated on 2018-04-20","explanation":"No transfer record matches. APNIC's statistics show it not listed on 2018-04-19 and allocated (dated 2018-04-19) on 2018-04-20. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2018/delegated-apnic-extended-20180420.gz","retrieved_at":"2026-10-12T22:26:44+00:00","summary":"Found by comparing APNIC's daily statistics: AS137578 not listed on 2018-04-19, allocated on 2018-04-20"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2018/delegated-apnic-extended-20180419.gz","retrieved_at":"2026-10-12T22:26:40+00:00","summary":"APNIC delegated statistics 2018-04-19, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2018/delegated-apnic-extended-20180420.gz","retrieved_at":"2026-10-12T22:26:44+00:00","summary":"APNIC delegated statistics 2018-04-20, after the change: allocated (dated 2018-04-19)"}]}],"classification_history":{"3c4ac878567ee025":[{"raw_change_id":532767,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:40:34+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2024-07-30 and allocated (dated 2018-04-19) on 2024-07-31. The tracker saw it removed from registration on 2024-07-23 (7 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":532767,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:27:06+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2024-07-30 and allocated (dated 2018-04-19) on 2024-07-31. The tracker saw it removed from registration on 2024-07-23 (7 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":532767,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:11:29+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2024-07-30 and allocated (dated 2018-04-19) on 2024-07-31. The tracker saw it removed from registration on 2024-07-23 (7 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":532767,"classification_code":"RESTORED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:26+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2024-07-30 and allocated (dated 2018-04-19) on 2024-07-31. The tracker saw it removed from registration on 2024-07-23 (7 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."}],"4de680120e31129b":[{"raw_change_id":532281,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:40:22+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2018-04-19) on 2024-07-23 and available on 2024-07-24. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":532281,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:27:03+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2018-04-19) on 2024-07-23 and available on 2024-07-24. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":532281,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:11:27+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2018-04-19) on 2024-07-23 and available on 2024-07-24. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":532281,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:23+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2018-04-19) on 2024-07-23 and available on 2024-07-24. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned ASNs a year after the removal or later since 2014, so the tracker estimates the hold ends on 2025-07-23. That is what APNIC has done, not a rule it states. This does not confirm availability."}],"19eb74966f765404":[{"raw_change_id":399458,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T05:40:02+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2018-04-19 and allocated (dated 2018-04-19) on 2018-04-20. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":399458,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:18:51+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2018-04-19 and allocated (dated 2018-04-19) on 2018-04-20. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":399458,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T15:02:39+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2018-04-19 and allocated (dated 2018-04-19) on 2018-04-20. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":399458,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-14T00:07:14+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2018-04-19 and allocated (dated 2018-04-19) on 2018-04-20. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."}]},"arin_statistics_now":{"status":"not listed"}}