{"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":"172.83.4.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/172.83.4.0-172.83.7.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-01-18)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"2803ed03436c5569","registry":"ARIN","report_date":"2018-01-18","source":"arin_issued","raw_action":"ADD","raw_line":"Add 172.83.4.0-172.83.7.255","resource_type":"ipv4","resource":"172.83.4.0/22","start":"172.83.4.0","end":"172.83.7.255","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":"2026-10-13T23:52:03+00:00","page":"https://rirtracker.com/ip/172.83.4.0-172.83.7.255/#e-2803ed03436c5569","report_page":"https://rirtracker.com/arin/reports/2018-01-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.4.0-172.83.7.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. 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/2018-January/003326.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-18: \"Add 172.83.4.0-172.83.7.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180117.gz","retrieved_at":"2026-10-12T21:40:24+00:00","summary":"ARIN delegated statistics 2018-01-17 (produced 2018-01-17T06:09:25+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180119.gz","retrieved_at":"2026-10-12T21:40:36+00:00","summary":"ARIN delegated statistics 2018-01-19 (produced 2018-01-19T06:09:47+00:00), after the report: allocated (dated 2018-01-18)"}]},{"event_id":"7001fb1549aae0d6","registry":"ARIN","report_date":"2018-01-18","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.83.4.0-172.83.7.255","resource_type":"ipv4","resource":"172.83.4.0/22","start":"172.83.4.0","end":"172.83.7.255","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":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","page":"https://rirtracker.com/ip/172.83.4.0-172.83.7.255/#e-7001fb1549aae0d6","report_page":"https://rirtracker.com/arin/reports/2018-01-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.4.0-172.83.7.255.json","explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.4.0-172.83.7.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-January/003326.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-18: \"Remove 172.83.4.0-172.83.7.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180117.gz","retrieved_at":"2026-10-12T21:40:24+00:00","summary":"ARIN delegated statistics 2018-01-17 (produced 2018-01-17T06:09:25+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180119.gz","retrieved_at":"2026-10-12T21:40:36+00:00","summary":"ARIN delegated statistics 2018-01-19 (produced 2018-01-19T06:09:47+00:00), after the report: allocated (dated 2018-01-18)"}]},{"event_id":"187e375a72c1f5b6","registry":"ARIN","report_date":"2018-01-13","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.83.4.0-172.83.7.255","resource_type":"ipv4","resource":"172.83.4.0/22","start":"172.83.4.0","end":"172.83.7.255","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":"2026-10-13T23:52:02+00:00","page":"https://rirtracker.com/ip/172.83.4.0-172.83.7.255/#e-187e375a72c1f5b6","report_page":"https://rirtracker.com/arin/reports/2018-01-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.4.0-172.83.7.255.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/2018-January/003321.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-13: \"Remove 172.83.4.0-172.83.7.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180112.gz","retrieved_at":"2026-10-12T21:40:11+00:00","summary":"ARIN delegated statistics 2018-01-12 (produced 2018-01-12T06:09:18+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180114.gz","retrieved_at":"2026-10-12T21:40:16+00:00","summary":"ARIN delegated statistics 2018-01-14 (produced 2018-01-14T06:10:46+00:00), after the report: reserved"}]}],"classification_history":{"2803ed03436c5569":[{"raw_change_id":153014,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:21+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-13 (172.83.4.0-172.83.7.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153014,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-13 (172.83.4.0-172.83.7.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153014,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-13 (172.83.4.0-172.83.7.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153014,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}],"7001fb1549aae0d6":[{"raw_change_id":152992,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:20+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.4.0-172.83.7.255. The issuance is explained on that line."},{"raw_change_id":152992,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.4.0-172.83.7.255. The issuance is explained on that line."},{"raw_change_id":152992,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.4.0-172.83.7.255. The issuance is explained on that line."},{"raw_change_id":152992,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.4.0-172.83.7.255. The issuance is explained on that line."}],"187e375a72c1f5b6":[{"raw_change_id":152807,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:07+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":152807,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+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":152807,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+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":152807,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:02+00:00","current":1,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."}]},"arin_statistics_now":{"status":"allocated (dated 2018-01-18)"}}