{"classifier_version":"1.0.0","generated":"2026-10-09T21:19:22+00:00","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by the American Registry for Internet Numbers (ARIN), the Number Resource Organization (NRO), or any 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":"156.9.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/156.9.0.0-156.9.255.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-10-06), allocated (dated 2026-10-07), allocated (dated 2026-10-08), reserved"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"b65ed8efd968eece","report_date":"2026-10-06","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 156.9.0.0-156.9.255.255","resource_type":"ipv4","resource":"156.9.0.0/16","start":"156.9.0.0","end":"156.9.255.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"OBSERVED_ONLY","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":true,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:27+00:00","page":"https://rirtracker.com/ip/156.9.0.0-156.9.255.255/#e-b65ed8efd968eece","evidence_url":"https://rirtracker.com/api/v1/events/b65ed8efd968eece.json","explanation":"ARIN's statistics show it reserved on 2026-10-05 and allocated (dated 2026-10-06), allocated (dated 2026-10-07), reserved on 2026-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 156.9.0.0-156.9.3.255, 156.9.4.0-156.9.7.255, 156.9.8.0-156.9.11.255, 156.9.12.0-156.9.15.255 and 37 more. The issuance is explained on those lines. Another change to this range was reported the day before or after (2026-10-07: Remove 156.9.72.0-156.9.75.255; 2026-10-07: Add 156.9.72.0-156.9.75.255; 2026-10-07: Remove 156.9.88.0-156.9.91.255), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-October/006510.html","retrieved_at":"2026-10-09T18:54:11+00:00","summary":"ARIN-Issued report for 2026-10-06: \"Remove 156.9.0.0-156.9.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261005","retrieved_at":"2026-10-09T19:08:43+00:00","summary":"ARIN delegated statistics 2026-10-05 (produced 2026-10-05T13:00:21+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261007","retrieved_at":"2026-10-09T19:08:50+00:00","summary":"ARIN delegated statistics 2026-10-07 (produced 2026-10-07T13:00:22+00:00), after the report: allocated (dated 2026-10-06), allocated (dated 2026-10-07), reserved"}]}],"classification_history":{"b65ed8efd968eece":[{"raw_change_id":5406,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:27+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2026-10-05 and allocated (dated 2026-10-06), allocated (dated 2026-10-07), reserved on 2026-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 156.9.0.0-156.9.3.255, 156.9.4.0-156.9.7.255, 156.9.8.0-156.9.11.255, 156.9.12.0-156.9.15.255 and 37 more. The issuance is explained on those lines. Another change to this range was reported the day before or after (2026-10-07: Remove 156.9.72.0-156.9.75.255; 2026-10-07: Add 156.9.72.0-156.9.75.255; 2026-10-07: Remove 156.9.88.0-156.9.91.255), so the before-and-after statistics may include it."}]}}