{"classifier_version":"1.0.0","generated":"2026-10-09T21:19:22+00:00","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by the American Registry for Internet Numbers (ARIN), the Number Resource Organization (NRO), or any 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":"52.129.64.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/52.129.64.0-52.129.95.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-07-07)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's statistics for 2026-10-09"},"rdap_snapshots":[],"transfers":[{"id":7559,"date":"2016-08-11T18:51:17Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"E.I. du Pont de Nemours and Co., Inc.","recipient_org":"iovation, Inc.","range":"52.129.64.0/19"}],"events":[{"event_id":"1e257b477bbf4ff0","report_date":"2026-07-07","source":"arin_issued","raw_action":"ADD","raw_line":"Add 52.129.64.0-52.129.95.255","resource_type":"ipv4","resource":"52.129.64.0/19","start":"52.129.64.0","end":"52.129.95.255","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":"1.0.0","classified_at":"2026-10-09T19:28:22+00:00","page":"https://rirtracker.com/ip/52.129.64.0-52.129.95.255/#e-1e257b477bbf4ff0","evidence_url":"https://rirtracker.com/api/v1/events/1e257b477bbf4ff0.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-07-06 and allocated (dated 2026-07-07) on 2026-07-08. The tracker saw this range removed from registration on 2026-01-05 (52.129.64.0/19), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-July/006419.html","retrieved_at":"2026-10-09T18:54:05+00:00","summary":"ARIN-Issued report for 2026-07-07: \"Add 52.129.64.0-52.129.95.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260706","retrieved_at":"2026-10-09T19:04:00+00:00","summary":"ARIN delegated statistics 2026-07-06 (produced 2026-07-06T09:00:22+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260708","retrieved_at":"2026-10-09T19:04:07+00:00","summary":"ARIN delegated statistics 2026-07-08 (produced 2026-07-08T09:00:21+00:00), after the report: allocated (dated 2026-07-07)"}]},{"event_id":"34f244973424666b","report_date":"2026-07-07","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 52.129.64.0-52.129.95.255","resource_type":"ipv4","resource":"52.129.64.0/19","start":"52.129.64.0","end":"52.129.95.255","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":"1.0.0","classified_at":"2026-10-09T19:28:22+00:00","page":"https://rirtracker.com/ip/52.129.64.0-52.129.95.255/#e-34f244973424666b","evidence_url":"https://rirtracker.com/api/v1/events/34f244973424666b.json","explanation":"ARIN's statistics show it reserved on 2026-07-06 and allocated (dated 2026-07-07) on 2026-07-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.64.0-52.129.95.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-July/006419.html","retrieved_at":"2026-10-09T18:54:05+00:00","summary":"ARIN-Issued report for 2026-07-07: \"Remove 52.129.64.0-52.129.95.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260706","retrieved_at":"2026-10-09T19:04:00+00:00","summary":"ARIN delegated statistics 2026-07-06 (produced 2026-07-06T09:00:22+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260708","retrieved_at":"2026-10-09T19:04:07+00:00","summary":"ARIN delegated statistics 2026-07-08 (produced 2026-07-08T09:00:21+00:00), after the report: allocated (dated 2026-07-07)"}]},{"event_id":"a4953169e5d74e7e","report_date":"2026-01-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"52.129.64.0/19","start":"52.129.64.0","end":"52.129.95.255","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":"1.0.0","classified_at":"2026-10-09T19:28:28+00:00","page":"https://rirtracker.com/ip/52.129.64.0-52.129.95.255/#e-a4953169e5d74e7e","evidence_url":"https://rirtracker.com/api/v1/events/a4953169e5d74e7e.json","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_days":60,"estimated_hold_end":"2026-03-06","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 allocated (dated 2016-08-11) on 2026-01-04 and reserved on 2026-01-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-03-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260106","retrieved_at":"2026-10-09T18:54:31+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 52.129.64.0/19 allocated on 2026-01-05, reserved on 2026-01-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260104","retrieved_at":"2026-10-09T18:54:24+00:00","summary":"ARIN delegated statistics 2026-01-04 (produced 2026-01-04T14:00:47+00:00), before the report: allocated (dated 2016-08-11)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260106","retrieved_at":"2026-10-09T18:54:31+00:00","summary":"ARIN delegated statistics 2026-01-06 (produced 2026-01-06T14:00:48+00:00), after the report: reserved"}]}],"classification_history":{"1e257b477bbf4ff0":[{"raw_change_id":3045,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:22+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-07-06 and allocated (dated 2026-07-07) on 2026-07-08. The tracker saw this range removed from registration on 2026-01-05 (52.129.64.0/19), so it appears to have been issued again from ARIN's pool."}],"34f244973424666b":[{"raw_change_id":3032,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:22+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2026-07-06 and allocated (dated 2026-07-07) on 2026-07-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.64.0-52.129.95.255. The issuance is explained on that line."}],"a4953169e5d74e7e":[{"raw_change_id":5813,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:28+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 allocated (dated 2016-08-11) on 2026-01-04 and reserved on 2026-01-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-03-06. This does not confirm availability."}]}}