{"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":"143.246.136.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/143.246.136.0-143.246.143.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"not listed"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":44251,"date":"2026-06-08T14:48:28Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"Muskingum University","recipient_org":"Zappie Host LLC","range":"143.246.136.0/22"},{"id":44245,"date":"2026-06-08T13:40:07Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"Muskingum University","recipient_org":"iFog GmbH","range":"143.246.140.0/22"}],"events":[{"event_id":"7ced198c185d8bdf","report_date":"2026-06-08","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"143.246.136.0/21","start":"143.246.136.0","end":"143.246.143.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"CONFLICTING","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:30+00:00","page":"https://rirtracker.com/ip/143.246.136.0-143.246.143.255/#e-7ced198c185d8bdf","evidence_url":"https://rirtracker.com/api/v1/events/7ced198c185d8bdf.json","explanation":"2 transfer records from around 2026-06-08 cover parts of this IPv4 range, and none of them matches the range exactly, so the tracker doesn't pick one. Queued for review.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260609","retrieved_at":"2026-10-09T19:02:35+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 143.246.136.0/21 allocated on 2026-06-08, not listed on 2026-06-09"},{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-09T18:54:15+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2026-06-08 14:48 UTC, Muskingum University (ARIN) to Zappie Host LLC (RIPE NCC); resources moved: 143.246.136.0/22"},{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-09T18:54:15+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2026-06-08 13:40 UTC, Muskingum University (ARIN) to iFog GmbH (RIPE NCC); resources moved: 143.246.140.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260607","retrieved_at":"2026-10-09T19:02:28+00:00","summary":"ARIN delegated statistics 2026-06-07 (produced 2026-06-07T09:00:20+00:00), before the report: allocated (dated 1990-10-26)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260609","retrieved_at":"2026-10-09T19:02:35+00:00","summary":"ARIN delegated statistics 2026-06-09 (produced 2026-06-09T09:00:19+00:00), after the report: not listed"}]}],"classification_history":{"7ced198c185d8bdf":[{"raw_change_id":6816,"classification_code":"UNRESOLVED","confidence":"CONFLICTING","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:30+00:00","current":1,"public_explanation":"2 transfer records from around 2026-06-08 cover parts of this IPv4 range, and none of them matches the range exactly, so the tracker doesn't pick one. Queued for review."}]}}