{"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":"172.84.144.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/172.84.144.0-172.84.145.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-01-17), allocated (dated 2018-01-18)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"f5cae99c3db2f491","registry":"ARIN","report_date":"2018-01-13","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.84.144.0-172.84.145.255","resource_type":"ipv4","resource":"172.84.144.0/23","start":"172.84.144.0","end":"172.84.145.255","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/172.84.144.0-172.84.145.255/#e-f5cae99c3db2f491","report_page":"https://rirtracker.com/arin/reports/2018-01-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.84.144.0-172.84.145.255.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 172.84.144.0-172.84.145.255\""},{"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":{"f5cae99c3db2f491":[{"raw_change_id":152820,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:08+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":152820,"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":152820,"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":152820,"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 2018-01-17), allocated (dated 2018-01-18)"}}