{"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":"208.72.28.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/208.72.28.0-208.72.31.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2017-07-14), allocated (dated 2017-11-14)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"efce149ef508457a","registry":"ARIN","report_date":"2017-06-16","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 208.72.28.0-208.72.31.255","resource_type":"ipv4","resource":"208.72.28.0/22","start":"208.72.28.0","end":"208.72.31.255","classification":"NO_MATERIAL_CHANGE","classification_label":"No substantive resource change found","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:48+00:00","page":"https://rirtracker.com/ip/208.72.28.0-208.72.31.255/#e-efce149ef508457a","report_page":"https://rirtracker.com/arin/reports/2017-06-16/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/208.72.28.0-208.72.31.255.json","explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved).","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2017-June/003109.html","retrieved_at":"2026-10-12T18:39:40+00:00","summary":"ARIN-Issued report for 2017-06-16: \"Remove 208.72.28.0-208.72.31.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170615.gz","retrieved_at":"2026-10-12T21:29:43+00:00","summary":"ARIN delegated statistics 2017-06-15 (produced 2017-06-15T05:09:26+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170617.gz","retrieved_at":"2026-10-12T21:29:48+00:00","summary":"ARIN delegated statistics 2017-06-17 (produced 2017-06-17T05:09:50+00:00), after the report: reserved"}]},{"event_id":"947c18fc9f57c34e","registry":"ARIN","report_date":"2014-08-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"208.72.28.0/22","start":"208.72.28.0","end":"208.72.31.255","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":"2026-10-13T23:59:58+00:00","page":"https://rirtracker.com/ip/208.72.28.0-208.72.31.255/#e-947c18fc9f57c34e","report_page":"https://rirtracker.com/arin/reports/2014-08-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/208.72.28.0-208.72.31.255.json","observed":"208.72.28.0/22 assigned on 2014-08-05, reserved on 2014-08-06","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":"2014-10-04","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 2006-11-02) on 2014-08-04 and reserved on 2014-08-06. 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 2014-10-04. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140806.gz","retrieved_at":"2026-10-12T20:39:04+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 208.72.28.0/22 assigned on 2014-08-05, reserved on 2014-08-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140804.gz","retrieved_at":"2026-10-12T20:38:59+00:00","summary":"ARIN delegated statistics 2014-08-04 (produced 2014-08-04T05:04:41+00:00), before the report: assigned (dated 2006-11-02)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140806.gz","retrieved_at":"2026-10-12T20:39:04+00:00","summary":"ARIN delegated statistics 2014-08-06 (produced 2014-08-06T05:04:56+00:00), after the report: reserved"}]}],"classification_history":{"efce149ef508457a":[{"raw_change_id":149591,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:38:27+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":149591,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:02+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":149591,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:41+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":149591,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:48+00:00","current":1,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."}],"947c18fc9f57c34e":[{"raw_change_id":287785,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:50:33+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 2006-11-02) on 2014-08-04 and reserved on 2014-08-06. 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 2014-10-04. This does not confirm availability."},{"raw_change_id":287785,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:46+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 2006-11-02) on 2014-08-04 and reserved on 2014-08-06. 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 2014-10-04. This does not confirm availability."},{"raw_change_id":287785,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:05+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 assigned (dated 2006-11-02) on 2014-08-04 and reserved on 2014-08-06. 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 2014-10-04. This does not confirm availability."},{"raw_change_id":287785,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:59:58+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 2006-11-02) on 2014-08-04 and reserved on 2014-08-06. 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 2014-10-04. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2017-07-14), allocated (dated 2017-11-14)"}}