{"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":"66.251.128.0/18","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.251.128.0-66.251.191.255/","statistics_now":{"registry":"AFRINIC","status":"allocated (dated 2016-04-18)"},"current_holder":{"rir":"AFRINIC","org":null,"how":"AFRINIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"ff1da25a4c3bf711","registry":"AFRINIC","report_date":"2016-04-18","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"66.251.128.0/18","start":"66.251.128.0","end":"66.251.191.255","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 AFRINIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:44+00:00","page":"https://rirtracker.com/ip/66.251.128.0-66.251.191.255/#e-ff1da25a4c3bf711","report_page":"https://rirtracker.com/afrinic/reports/2016-04-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.251.128.0-66.251.191.255.json","observed":"66.251.128.0/18 available on 2016-04-18, allocated on 2016-04-19","explanation":"No transfer record matches. AFRINIC's statistics show it available on 2016-04-18 and allocated (dated 2016-04-18) on 2016-04-19. It moved from AFRINIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by AFRINIC.","evidence":[{"type":"statistics_diff","url":"https://ftp.afrinic.net/pub/stats/afrinic/2016/delegated-afrinic-extended-20160419","retrieved_at":"2026-10-12T20:50:06+00:00","summary":"Found by comparing AFRINIC's daily statistics: 66.251.128.0/18 available on 2016-04-18, allocated on 2016-04-19"},{"type":"delegated_before","url":"https://ftp.afrinic.net/pub/stats/afrinic/2016/delegated-afrinic-extended-20160418","retrieved_at":"2026-10-12T20:50:01+00:00","summary":"AFRINIC delegated statistics 2016-04-18, before the change: available"},{"type":"delegated_after","url":"https://ftp.afrinic.net/pub/stats/afrinic/2016/delegated-afrinic-extended-20160419","retrieved_at":"2026-10-12T20:50:06+00:00","summary":"AFRINIC delegated statistics 2016-04-19, after the change: allocated (dated 2016-04-18)"}]},{"event_id":"84704242e58f9d39","registry":"ARIN","report_date":"2011-12-29","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"66.251.128.0/18","start":"66.251.128.0","end":"66.251.191.255","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":"1.4.0","classified_at":"2026-10-13T23:56:53+00:00","page":"https://rirtracker.com/ip/66.251.128.0-66.251.191.255/#e-84704242e58f9d39","report_page":"https://rirtracker.com/arin/reports/2011-12-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.251.128.0-66.251.191.255.json","observed":"66.251.128.0/18 allocated on 2011-12-29, not listed on 2011-12-30","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":"2012-02-27","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 2004-01-06) on 2011-12-28 and not issued on 2011-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2012-02-27. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20111230.gz","retrieved_at":"2026-10-12T19:29:39+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 66.251.128.0/18 allocated on 2011-12-29, not listed on 2011-12-30"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20111228.gz","retrieved_at":"2026-10-12T19:29:31+00:00","summary":"ARIN delegated statistics 2011-12-28, before the report: allocated (dated 2004-01-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20111230.gz","retrieved_at":"2026-10-12T19:29:39+00:00","summary":"ARIN delegated statistics 2011-12-30, after the report: not issued"}]}],"classification_history":{"ff1da25a4c3bf711":[{"raw_change_id":298740,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:55:27+00:00","current":0,"public_explanation":"No transfer record matches. AFRINIC's statistics show it available on 2016-04-18 and allocated (dated 2016-04-18) on 2016-04-19. It moved from AFRINIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by AFRINIC."},{"raw_change_id":298740,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:13:26+00:00","current":0,"public_explanation":"No transfer record matches. AFRINIC's statistics show it available on 2016-04-18 and allocated (dated 2016-04-18) on 2016-04-19. It moved from AFRINIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by AFRINIC."},{"raw_change_id":298740,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:49+00:00","current":0,"public_explanation":"No transfer record matches. AFRINIC's statistics show it available on 2016-04-18 and allocated (dated 2016-04-18) on 2016-04-19. It moved from AFRINIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by AFRINIC."},{"raw_change_id":298740,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:44+00:00","current":1,"public_explanation":"No transfer record matches. AFRINIC's statistics show it available on 2016-04-18 and allocated (dated 2016-04-18) on 2016-04-19. It moved from AFRINIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by AFRINIC."}],"84704242e58f9d39":[{"raw_change_id":236149,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:22:52+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 allocated (dated 2004-01-06) on 2011-12-28 and not issued on 2011-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2012-02-27. This does not confirm availability."},{"raw_change_id":236149,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:10:05+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 allocated (dated 2004-01-06) on 2011-12-28 and not issued on 2011-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2012-02-27. This does not confirm availability."},{"raw_change_id":236149,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:53:11+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 allocated (dated 2004-01-06) on 2011-12-28 and not issued on 2011-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2012-02-27. This does not confirm availability."},{"raw_change_id":236149,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:53+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 2004-01-06) on 2011-12-28 and not issued on 2011-12-30. (Until 2013-03-05, ARIN's statistics list only what's issued.) Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2012-02-27. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}