{"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":"205.172.120.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/205.172.120.0-205.172.127.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2015-04-03)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"a9d212296a5c8008","registry":"ARIN","report_date":"2015-04-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 205.172.120.0-205.172.127.255","resource_type":"ipv4","resource":"205.172.120.0/21","start":"205.172.120.0","end":"205.172.127.255","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 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/205.172.120.0-205.172.127.255/#e-a9d212296a5c8008","report_page":"https://rirtracker.com/arin/reports/2015-04-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/205.172.120.0-205.172.127.255.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-02 and allocated (dated 2015-04-03) on 2015-04-04. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2015-April/002305.html","retrieved_at":"2026-10-12T18:38:45+00:00","summary":"ARIN-Issued report for 2015-04-03: \"Add 205.172.120.0-205.172.127.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150402.gz","retrieved_at":"2026-10-12T20:50:29+00:00","summary":"ARIN delegated statistics 2015-04-02 (produced 2015-04-02T05:05:37+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150404.gz","retrieved_at":"2026-10-12T20:50:41+00:00","summary":"ARIN delegated statistics 2015-04-04 (produced 2015-04-04T05:05:23+00:00), after the report: allocated (dated 2015-04-03)"}]},{"event_id":"55a5468968752916","registry":"ARIN","report_date":"2013-05-06","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 205.172.120.0-205.172.127.255","resource_type":"ipv4","resource":"205.172.120.0/21","start":"205.172.120.0","end":"205.172.127.255","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":"2026-10-13T23:51:06+00:00","page":"https://rirtracker.com/ip/205.172.120.0-205.172.127.255/#e-55a5468968752916","report_page":"https://rirtracker.com/arin/reports/2013-05-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/205.172.120.0-205.172.127.255.json","explanation":"ARIN's statistics show it reserved on 2013-05-05 and available on 2013-05-07. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. 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/2013-May/001607.html","retrieved_at":"2026-10-12T18:37:57+00:00","summary":"ARIN-Issued report for 2013-05-06: \"Remove 205.172.120.0-205.172.127.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130505.gz","retrieved_at":"2026-10-12T19:58:22+00:00","summary":"ARIN delegated statistics 2013-05-05 (produced 2013-05-05T05:06:14+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130507.gz","retrieved_at":"2026-10-12T19:58:27+00:00","summary":"ARIN delegated statistics 2013-05-07 (produced 2013-05-07T05:05:12+00:00), after the report: available"}]}],"classification_history":{"a9d212296a5c8008":[{"raw_change_id":136898,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:30:22+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2015-04-02 and allocated (dated 2015-04-03) on 2015-04-04. The tracker saw this range released from hold on 2013-05-06 (205.172.120.0-205.172.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136898,"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 2015-04-02 and allocated (dated 2015-04-03) on 2015-04-04. The tracker saw this range released from hold on 2013-05-06 (205.172.120.0-205.172.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136898,"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 2015-04-02 and allocated (dated 2015-04-03) on 2015-04-04. The tracker saw this range released from hold on 2013-05-06 (205.172.120.0-205.172.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":136898,"classification_code":"APPARENT_NEW_ISSUANCE","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 2015-04-02 and allocated (dated 2015-04-03) on 2015-04-04. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}],"55a5468968752916":[{"raw_change_id":129214,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:20:55+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2013-05-05 and available on 2013-05-07. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":129214,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:29+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2013-05-05 and available on 2013-05-07. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":129214,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:04+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2013-05-05 and available on 2013-05-07. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":129214,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:06+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2013-05-05 and available on 2013-05-07. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. That is ARIN's own label: whether and when it is reissued is not confirmed."}]},"arin_statistics_now":{"status":"allocated (dated 2015-04-03)"}}