{"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":"66.133.72.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.133.72.0-66.133.79.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-09-29)"},"current_holder":{"rir":"ARIN","org":"Nimbus Limited.","how":"ARIN's statistics for 2026-10-09 and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":45740,"date":"2026-09-29T19:55:44Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"DOJ-USMS","recipient_org":"Nimbus Limited.","range":"66.133.72.0/21"},{"id":35441,"date":"2024-05-08T22:10:30Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Micfo, LLC.","recipient_org":"U.S. Marshals Service in accordance with the Final Order of Forfeiture","range":"66.133.72.0/21"},{"id":6232,"date":"2015-12-09T18:06:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"KEYSTONE IT  INC","recipient_org":"Micfo, LLC.","range":"66.133.72.0/21"}],"events":[{"event_id":"798a19f920c12807","report_date":"2026-09-29","source":"arin_issued","raw_action":"ADD","raw_line":"Add 66.133.72.0-66.133.79.255","resource_type":"ipv4","resource":"66.133.72.0/21","start":"66.133.72.0","end":"66.133.79.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"DOJ-USMS","recipient_organization":"Nimbus Limited.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","page":"https://rirtracker.com/ip/66.133.72.0-66.133.79.255/#e-798a19f920c12807","evidence_url":"https://rirtracker.com/api/v1/events/798a19f920c12807.json","explanation":"ARIN's transfer log records a transfer from DOJ-USMS (ARIN) to Nimbus Limited. (ARIN) on 2026-09-29 19:55 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-September/006503.html","retrieved_at":"2026-10-09T18:54:09+00:00","summary":"ARIN-Issued report for 2026-09-29: \"Add 66.133.72.0-66.133.79.255\""},{"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 2026-09-29 19:55 UTC, DOJ-USMS (ARIN) to Nimbus Limited. (ARIN); resources moved: 66.133.72.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260928","retrieved_at":"2026-10-09T19:08:20+00:00","summary":"ARIN delegated statistics 2026-09-28 (produced 2026-09-28T13:00:21+00:00), before the report: allocated (dated 2015-12-09)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260930","retrieved_at":"2026-10-09T19:08:27+00:00","summary":"ARIN delegated statistics 2026-09-30 (produced 2026-09-30T13:00:21+00:00), after the report: allocated (dated 2026-09-29)"}]}],"classification_history":{"798a19f920c12807":[{"raw_change_id":4713,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from DOJ-USMS (ARIN) to Nimbus Limited. (ARIN) on 2026-09-29 19:55 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]}}