{"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":"AS400197","resource_type":"asn","page":"https://rirtracker.com/asn/400197/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2023-12-04)"},"current_holder":{"rir":"ARIN","org":"ConocoPhillips Company","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":4653,"date":"2025-08-14T17:46:02Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Marathon Oil Company","recipient_org":"ConocoPhillips Company","range":"AS400197","log":"ARIN"}],"events":[{"event_id":"0e210180cf53d822","registry":"ARIN","report_date":"2025-08-14","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS400197","start":400197,"end":400197,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Marathon Oil Company","recipient_organization":"ConocoPhillips Company","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:23+00:00","page":"https://rirtracker.com/asn/400197/#e-0e210180cf53d822","report_page":"https://rirtracker.com/arin/reports/2025-08-14/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/400197.json","observed":"Merger/acquisition: Marathon Oil Company (ARIN) to ConocoPhillips Company (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Marathon Oil Company (ARIN) to ConocoPhillips Company (ARIN) on 2025-08-14 17:46 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 2025-08-14 17:46 UTC, Marathon Oil Company (ARIN) to ConocoPhillips Company (ARIN); resources moved: AS400197"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250813.gz","retrieved_at":"2026-10-13T00:04:57+00:00","summary":"ARIN delegated statistics 2025-08-13 (produced 2025-08-13T13:00:50+00:00), before the report: assigned (dated 2023-12-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250815.gz","retrieved_at":"2026-10-13T00:05:02+00:00","summary":"ARIN delegated statistics 2025-08-15 (produced 2025-08-15T13:00:51+00:00), after the report: assigned (dated 2023-12-04)"}]},{"event_id":"645905ad21f8448b","registry":"ARIN","report_date":"2023-12-04","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS400197","resource_type":"asn","resource":"AS400197","start":400197,"end":400197,"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":"2026-10-13T23:53:54+00:00","page":"https://rirtracker.com/asn/400197/#e-645905ad21f8448b","report_page":"https://rirtracker.com/arin/reports/2023-12-04/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/400197.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2023-12-03 and assigned (dated 2023-12-04) on 2023-12-05. The tracker saw this range released from hold on 2023-11-28 (AS400197), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-December/005470.html","retrieved_at":"2026-10-12T18:42:25+00:00","summary":"ARIN-Issued report for 2023-12-04: \"Add AS400197\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231203.gz","retrieved_at":"2026-10-12T23:31:22+00:00","summary":"ARIN delegated statistics 2023-12-03 (produced 2023-12-03T14:00:34+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231205.gz","retrieved_at":"2026-10-12T23:31:27+00:00","summary":"ARIN delegated statistics 2023-12-05 (produced 2023-12-05T14:00:34+00:00), after the report: assigned (dated 2023-12-04)"}]},{"event_id":"2d62645b67dc48a7","registry":"ARIN","report_date":"2023-11-28","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS400197","resource_type":"asn","resource":"AS400197","start":400197,"end":400197,"classification":"HOLD_RELEASED","classification_label":"Released from hold (ARIN lists it as 'available')","confidence":"STRONG_INFERENCE","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":"2026-10-13T23:53:53+00:00","page":"https://rirtracker.com/asn/400197/#e-2d62645b67dc48a7","report_page":"https://rirtracker.com/arin/reports/2023-11-28/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/400197.json","explanation":"ARIN's statistics show it reserved on 2023-11-27 and available on 2023-11-29. 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 2022-12-05, 358 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-November/005464.html","retrieved_at":"2026-10-12T18:42:23+00:00","summary":"ARIN-Issued report for 2023-11-28: \"Remove AS400197\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231127.gz","retrieved_at":"2026-10-12T23:31:00+00:00","summary":"ARIN delegated statistics 2023-11-27 (produced 2023-11-27T14:00:36+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231129.gz","retrieved_at":"2026-10-12T23:31:05+00:00","summary":"ARIN delegated statistics 2023-11-29 (produced 2023-11-29T14:00:34+00:00), after the report: available"}]},{"event_id":"e6dad62aa3f777b9","registry":"ARIN","report_date":"2022-12-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS400197","start":400197,"end":400197,"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":"2026-10-14T00:10:01+00:00","page":"https://rirtracker.com/asn/400197/#e-e6dad62aa3f777b9","report_page":"https://rirtracker.com/arin/reports/2022-12-05/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/400197.json","observed":"AS400197 assigned on 2022-12-05, reserved on 2022-12-06","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":"2023-06-05","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 2021-11-03) on 2022-12-04 and reserved on 2022-12-06. 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 2023-06-05. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20221206.gz","retrieved_at":"2026-10-12T23:12:11+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS400197 assigned on 2022-12-05, reserved on 2022-12-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20221204.gz","retrieved_at":"2026-10-12T23:12:06+00:00","summary":"ARIN delegated statistics 2022-12-04 (produced 2022-12-04T14:00:10+00:00), before the report: assigned (dated 2021-11-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20221206.gz","retrieved_at":"2026-10-12T23:12:11+00:00","summary":"ARIN delegated statistics 2022-12-06 (produced 2022-12-06T14:00:10+00:00), after the report: reserved"}]},{"event_id":"d33e94834c37b353","registry":"ARIN","report_date":"2021-11-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS400197","resource_type":"asn","resource":"AS400197","start":400197,"end":400197,"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":"2026-10-13T23:53:16+00:00","page":"https://rirtracker.com/asn/400197/#e-d33e94834c37b353","report_page":"https://rirtracker.com/arin/reports/2021-11-03/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/400197.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2021-11-02 and assigned (dated 2021-11-03) on 2021-11-04. 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/2021-November/004709.html","retrieved_at":"2026-10-12T18:41:32+00:00","summary":"ARIN-Issued report for 2021-11-03: \"Add AS400197\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211102.gz","retrieved_at":"2026-10-12T22:51:26+00:00","summary":"ARIN delegated statistics 2021-11-02 (produced 2021-11-02T14:00:12+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211104.gz","retrieved_at":"2026-10-12T22:51:32+00:00","summary":"ARIN delegated statistics 2021-11-04 (produced 2021-11-04T13:00:12+00:00), after the report: assigned (dated 2021-11-03)"}]}],"classification_history":{"0e210180cf53d822":[{"raw_change_id":574167,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:23+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Marathon Oil Company (ARIN) to ConocoPhillips Company (ARIN) on 2025-08-14 17:46 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."}],"645905ad21f8448b":[{"raw_change_id":184421,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:32+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-12-03 and assigned (dated 2023-12-04) on 2023-12-05. The tracker saw this range released from hold on 2023-11-28 (AS400197), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":184421,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:35+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-12-03 and assigned (dated 2023-12-04) on 2023-12-05. The tracker saw this range released from hold on 2023-11-28 (AS400197), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":184421,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:26+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-12-03 and assigned (dated 2023-12-04) on 2023-12-05. The tracker saw this range released from hold on 2023-11-28 (AS400197), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":184421,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:54+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2023-12-03 and assigned (dated 2023-12-04) on 2023-12-05. The tracker saw this range released from hold on 2023-11-28 (AS400197), so it appears to have been issued again from ARIN's pool."}],"2d62645b67dc48a7":[{"raw_change_id":184361,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:31+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-11-27 and available on 2023-11-29. 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 2022-12-05, 358 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":184361,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:35+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-11-27 and available on 2023-11-29. 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 2022-12-05, 358 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":184361,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:26+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-11-27 and available on 2023-11-29. 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 2022-12-05, 358 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":184361,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:53+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2023-11-27 and available on 2023-11-29. 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 2022-12-05, 358 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."}],"e6dad62aa3f777b9":[{"raw_change_id":437767,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:55:22+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 2021-11-03) on 2022-12-04 and reserved on 2022-12-06. 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 2023-06-05. This does not confirm availability."},{"raw_change_id":437767,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:21:11+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 2021-11-03) on 2022-12-04 and reserved on 2022-12-06. 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 2023-06-05. This does not confirm availability."},{"raw_change_id":437767,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:05:08+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 2021-11-03) on 2022-12-04 and reserved on 2022-12-06. 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 2023-06-05. This does not confirm availability."},{"raw_change_id":437767,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:10:01+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 2021-11-03) on 2022-12-04 and reserved on 2022-12-06. 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 2023-06-05. This does not confirm availability."}],"d33e94834c37b353":[{"raw_change_id":173955,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:13+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2021-11-02 and assigned (dated 2021-11-03) on 2021-11-04. 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":173955,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:08+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2021-11-02 and assigned (dated 2021-11-03) on 2021-11-04. 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":173955,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:55+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2021-11-02 and assigned (dated 2021-11-03) on 2021-11-04. 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":173955,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:16+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2021-11-02 and assigned (dated 2021-11-03) on 2021-11-04. 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":"assigned (dated 2023-12-04)"}}