{"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":"158.51.176.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/158.51.176.0-158.51.177.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-01-22), reserved"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"e287469d6b3354d9","registry":"ARIN","report_date":"2020-01-10","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 158.51.176.0-158.51.177.255","resource_type":"ipv4","resource":"158.51.176.0/23","start":"158.51.176.0","end":"158.51.177.255","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":"2026-10-13T23:52:42+00:00","page":"https://rirtracker.com/ip/158.51.176.0-158.51.177.255/#e-e287469d6b3354d9","report_page":"https://rirtracker.com/arin/reports/2020-01-10/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.176.0-158.51.177.255.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/2020-January/004047.html","retrieved_at":"2026-10-12T18:40:45+00:00","summary":"ARIN-Issued report for 2020-01-10: \"Remove 158.51.176.0-158.51.177.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200109.gz","retrieved_at":"2026-10-12T22:17:20+00:00","summary":"ARIN delegated statistics 2020-01-09 (produced 2020-01-09T15:00:09+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200111.gz","retrieved_at":"2026-10-12T22:17:25+00:00","summary":"ARIN delegated statistics 2020-01-11 (produced 2020-01-11T15:00:09+00:00), after the report: reserved"}]}],"classification_history":{"e287469d6b3354d9":[{"raw_change_id":163242,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:46:52+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":163242,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:42+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":163242,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:26+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":163242,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:42+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 2020-01-22), reserved"}}