{"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":"AS53601","resource_type":"asn","page":"https://rirtracker.com/asn/53601/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2018-02-01)"},"current_holder":{"rir":"ARIN","org":"Invesco Group Services, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":1853,"date":"2019-10-17T16:56:10Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"OppenheimerFunds, Inc.","recipient_org":"Invesco Group Services, Inc.","range":"AS53601","log":"ARIN"}],"events":[{"event_id":"bbeeb0566920bbd8","registry":"ARIN","report_date":"2019-10-17","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS53601","start":53601,"end":53601,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"OppenheimerFunds, Inc.","recipient_organization":"Invesco Group Services, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:47+00:00","page":"https://rirtracker.com/asn/53601/#e-bbeeb0566920bbd8","report_page":"https://rirtracker.com/arin/reports/2019-10-17/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/53601.json","observed":"Merger/acquisition: OppenheimerFunds, Inc. (ARIN) to Invesco Group Services, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from OppenheimerFunds, Inc. (ARIN) to Invesco Group Services, Inc. (ARIN) on 2019-10-17 16:56 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 2019-10-17 16:56 UTC, OppenheimerFunds, Inc. (ARIN) to Invesco Group Services, Inc. (ARIN); resources moved: AS53601"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191016.gz","retrieved_at":"2026-10-12T22:12:51+00:00","summary":"ARIN delegated statistics 2019-10-16 (produced 2019-10-16T14:00:13+00:00), before the report: assigned (dated 2018-02-01)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191018.gz","retrieved_at":"2026-10-12T22:12:56+00:00","summary":"ARIN delegated statistics 2019-10-18 (produced 2019-10-18T14:00:12+00:00), after the report: assigned (dated 2018-02-01)"}]},{"event_id":"11ecce2080899064","registry":"ARIN","report_date":"2018-02-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS53601","resource_type":"asn","resource":"AS53601","start":53601,"end":53601,"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":"2026-10-13T23:52:04+00:00","page":"https://rirtracker.com/asn/53601/#e-11ecce2080899064","report_page":"https://rirtracker.com/arin/reports/2018-02-01/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/53601.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2018-01-31 and assigned (dated 2018-02-01) on 2018-02-02. The tracker saw this range released from hold on 2017-10-19 (AS53601), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-February/003340.html","retrieved_at":"2026-10-12T18:39:57+00:00","summary":"ARIN-Issued report for 2018-02-01: \"Add AS53601\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180131.gz","retrieved_at":"2026-10-12T21:41:06+00:00","summary":"ARIN delegated statistics 2018-01-31 (produced 2018-01-31T06:09:56+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180202.gz","retrieved_at":"2026-10-12T21:41:18+00:00","summary":"ARIN delegated statistics 2018-02-02 (produced 2018-02-02T06:09:34+00:00), after the report: assigned (dated 2018-02-01)"}]},{"event_id":"106d225a51bd1f4c","registry":"ARIN","report_date":"2017-10-19","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS53601","resource_type":"asn","resource":"AS53601","start":53601,"end":53601,"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":"2026-10-13T23:51:58+00:00","page":"https://rirtracker.com/asn/53601/#e-106d225a51bd1f4c","report_page":"https://rirtracker.com/arin/reports/2017-10-19/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/53601.json","explanation":"ARIN's statistics show it reserved on 2017-10-18 and available on 2017-10-20. 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 2017-08-08, 72 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/2017-October/003235.html","retrieved_at":"2026-10-12T18:39:49+00:00","summary":"ARIN-Issued report for 2017-10-19: \"Remove AS53601\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171018.gz","retrieved_at":"2026-10-12T21:36:02+00:00","summary":"ARIN delegated statistics 2017-10-18 (produced 2017-10-18T05:11:24+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171020.gz","retrieved_at":"2026-10-12T21:36:07+00:00","summary":"ARIN delegated statistics 2017-10-20 (produced 2017-10-20T05:11:02+00:00), after the report: available"}]},{"event_id":"48dbc5af7d74b507","registry":"ARIN","report_date":"2017-08-08","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS53601","start":53601,"end":53601,"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":"2026-10-14T00:03:20+00:00","page":"https://rirtracker.com/asn/53601/#e-48dbc5af7d74b507","report_page":"https://rirtracker.com/arin/reports/2017-08-08/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/53601.json","observed":"AS53601 assigned on 2017-08-08, reserved on 2017-08-09","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":"2018-02-08","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 2010-08-05) on 2017-08-07 and reserved on 2017-08-09. 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 2018-02-08. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170809.gz","retrieved_at":"2026-10-12T21:32:31+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS53601 assigned on 2017-08-08, reserved on 2017-08-09"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170807.gz","retrieved_at":"2026-10-12T21:32:26+00:00","summary":"ARIN delegated statistics 2017-08-07 (produced 2017-08-07T05:10:17+00:00), before the report: assigned (dated 2010-08-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170809.gz","retrieved_at":"2026-10-12T21:32:31+00:00","summary":"ARIN delegated statistics 2017-08-09 (produced 2017-08-09T05:10:27+00:00), after the report: reserved"}]}],"classification_history":{"bbeeb0566920bbd8":[{"raw_change_id":559494,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:47+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from OppenheimerFunds, Inc. (ARIN) to Invesco Group Services, Inc. (ARIN) on 2019-10-17 16:56 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."}],"11ecce2080899064":[{"raw_change_id":153253,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:28+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2018-01-31 and assigned (dated 2018-02-01) on 2018-02-02. The tracker saw this range released from hold on 2017-10-19 (AS53601), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153253,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:13+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2018-01-31 and assigned (dated 2018-02-01) on 2018-02-02. The tracker saw this range released from hold on 2017-10-19 (AS53601), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153253,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:54+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2018-01-31 and assigned (dated 2018-02-01) on 2018-02-02. The tracker saw this range released from hold on 2017-10-19 (AS53601), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153253,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:04+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2018-01-31 and assigned (dated 2018-02-01) on 2018-02-02. The tracker saw this range released from hold on 2017-10-19 (AS53601), so it appears to have been issued again from ARIN's pool."}],"106d225a51bd1f4c":[{"raw_change_id":151827,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:39:26+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-10-18 and available on 2017-10-20. 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 2017-08-08, 72 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":151827,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:09+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-10-18 and available on 2017-10-20. 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 2017-08-08, 72 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":151827,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:50+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-10-18 and available on 2017-10-20. 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 2017-08-08, 72 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":151827,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:58+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2017-10-18 and available on 2017-10-20. 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 2017-08-08, 72 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."}],"48dbc5af7d74b507":[{"raw_change_id":339093,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:14:14+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 2010-08-05) on 2017-08-07 and reserved on 2017-08-09. 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 2018-02-08. This does not confirm availability."},{"raw_change_id":339093,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:15:39+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 2010-08-05) on 2017-08-07 and reserved on 2017-08-09. 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 2018-02-08. This does not confirm availability."},{"raw_change_id":339093,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:59:11+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 2010-08-05) on 2017-08-07 and reserved on 2017-08-09. 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 2018-02-08. This does not confirm availability."},{"raw_change_id":339093,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:03:20+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 2010-08-05) on 2017-08-07 and reserved on 2017-08-09. 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 2018-02-08. This does not confirm availability."}]},"arin_statistics_now":{"status":"assigned (dated 2018-02-01)"}}