{"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":"216.252.220.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/216.252.220.0-216.252.223.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2015-04-02)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"53914611becfc383","registry":"ARIN","report_date":"2015-04-02","source":"arin_issued","raw_action":"ADD","raw_line":"Add 216.252.220.0-216.252.223.255","resource_type":"ipv4","resource":"216.252.220.0/22","start":"216.252.220.0","end":"216.252.223.255","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":"1.4.0","classified_at":"2026-10-13T23:51:22+00:00","page":"https://rirtracker.com/ip/216.252.220.0-216.252.223.255/#e-53914611becfc383","report_page":"https://rirtracker.com/arin/reports/2015-04-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.252.220.0-216.252.223.255.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-01 and allocated (dated 2015-04-02) on 2015-04-03. The tracker saw this range released from hold on 2010-06-07 (216.252.220.0-216.252.223.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2015-April/002304.html","retrieved_at":"2026-10-12T18:38:45+00:00","summary":"ARIN-Issued report for 2015-04-02: \"Add 216.252.220.0-216.252.223.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150401.gz","retrieved_at":"2026-10-12T20:50:27+00:00","summary":"ARIN delegated statistics 2015-04-01 (produced 2015-04-01T05:05:21+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150403.gz","retrieved_at":"2026-10-12T20:50:38+00:00","summary":"ARIN delegated statistics 2015-04-03 (produced 2015-04-03T05:05:22+00:00), after the report: allocated (dated 2015-04-02)"}]},{"event_id":"1c622f667dedb07d","registry":"ARIN","report_date":"2010-06-07","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 216.252.220.0-216.252.223.255","resource_type":"ipv4","resource":"216.252.220.0/22","start":"216.252.220.0","end":"216.252.223.255","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":"2026-10-13T23:50:49+00:00","page":"https://rirtracker.com/ip/216.252.220.0-216.252.223.255/#e-1c622f667dedb07d","report_page":"https://rirtracker.com/arin/reports/2010-06-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.252.220.0-216.252.223.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-06-06 and not issued on 2010-06-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-June/000538.html","retrieved_at":"2026-10-12T18:36:43+00:00","summary":"ARIN-Issued report for 2010-06-07: \"Remove 216.252.220.0-216.252.223.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100606.gz","retrieved_at":"2026-10-12T19:06:08+00:00","summary":"ARIN delegated statistics 2010-06-06, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100608.gz","retrieved_at":"2026-10-12T19:06:13+00:00","summary":"ARIN delegated statistics 2010-06-08, after the report: not issued"}]},{"event_id":"c19a3a922ad392b8","registry":"ARIN","report_date":"2009-06-02","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"216.252.220.0/22","start":"216.252.220.0","end":"216.252.223.255","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":"2026-10-13T23:55:05+00:00","page":"https://rirtracker.com/ip/216.252.220.0-216.252.223.255/#e-c19a3a922ad392b8","report_page":"https://rirtracker.com/arin/reports/2009-06-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.252.220.0-216.252.223.255.json","observed":"216.252.220.0/22 allocated on 2009-06-02, not listed on 2009-06-03","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":"2009-08-01","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 1999-11-08) on 2009-06-01 and not issued on 2009-06-03. (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 2009-08-01. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090603.gz","retrieved_at":"2026-10-12T18:51:00+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 216.252.220.0/22 allocated on 2009-06-02, not listed on 2009-06-03"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090601.gz","retrieved_at":"2026-10-12T18:50:55+00:00","summary":"ARIN delegated statistics 2009-06-01, before the report: allocated (dated 1999-11-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090603.gz","retrieved_at":"2026-10-12T18:51:00+00:00","summary":"ARIN delegated statistics 2009-06-03, after the report: not issued"}]}],"classification_history":{"53914611becfc383":[{"raw_change_id":136873,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:30:20+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-01 and allocated (dated 2015-04-02) on 2015-04-03. The tracker saw this range released from hold on 2010-06-07 (216.252.220.0-216.252.223.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136873,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:41+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-01 and allocated (dated 2015-04-02) on 2015-04-03. The tracker saw this range released from hold on 2010-06-07 (216.252.220.0-216.252.223.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136873,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:18+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-01 and allocated (dated 2015-04-02) on 2015-04-03. The tracker saw this range released from hold on 2010-06-07 (216.252.220.0-216.252.223.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136873,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:22+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-01 and allocated (dated 2015-04-02) on 2015-04-03. The tracker saw this range released from hold on 2010-06-07 (216.252.220.0-216.252.223.255), so it appears to have been issued again from ARIN's pool."}],"1c622f667dedb07d":[{"raw_change_id":121398,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:14+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-06-06 and not issued on 2010-06-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121398,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:16+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-06-06 and not issued on 2010-06-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121398,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:50+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-06-06 and not issued on 2010-06-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121398,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-06-06 and not issued on 2010-06-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."}],"c19a3a922ad392b8":[{"raw_change_id":205113,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:11:04+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 1999-11-08) on 2009-06-01 and not issued on 2009-06-03. (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 2009-08-01. This does not confirm availability."},{"raw_change_id":205113,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:31+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 1999-11-08) on 2009-06-01 and not issued on 2009-06-03. (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 2009-08-01. This does not confirm availability."},{"raw_change_id":205113,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:29+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 1999-11-08) on 2009-06-01 and not issued on 2009-06-03. (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 2009-08-01. This does not confirm availability."},{"raw_change_id":205113,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:05+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 1999-11-08) on 2009-06-01 and not issued on 2009-06-03. (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 2009-08-01. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2015-04-02)"}}