{"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":"153.75.16.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/153.75.16.0-153.75.31.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-04-24)"},"current_holder":{"rir":"ARIN","org":"Rio Blanco County, CO","how":"ARIN's statistics for 2026-10-09 and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":43670,"date":"2026-04-24T17:17:42Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"NCR Voyix Corporation","recipient_org":"Rio Blanco County, CO","range":"153.75.16.0/20"}],"events":[{"event_id":"3f4504fda971595c","report_date":"2026-04-24","source":"arin_issued","raw_action":"ADD","raw_line":"Add 153.75.16.0-153.75.31.255","resource_type":"ipv4","resource":"153.75.16.0/20","start":"153.75.16.0","end":"153.75.31.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"NCR Voyix Corporation","recipient_organization":"Rio Blanco County, CO","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","page":"https://rirtracker.com/ip/153.75.16.0-153.75.31.255/#e-3f4504fda971595c","evidence_url":"https://rirtracker.com/api/v1/events/3f4504fda971595c.json","piece_of":{"resource":"153.74.0.0/15","page":"https://rirtracker.com/ip/153.74.0.0-153.75.255.255/"},"explanation":"ARIN's transfer log records a transfer from NCR Voyix Corporation (ARIN) to Rio Blanco County, CO (ARIN) on 2026-04-24 17:17 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-April/006342.html","retrieved_at":"2026-10-09T18:53:59+00:00","summary":"ARIN-Issued report for 2026-04-24: \"Add 153.75.16.0-153.75.31.255\""},{"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 2026-04-24 17:17 UTC, NCR Voyix Corporation (ARIN) to Rio Blanco County, CO (ARIN); resources moved: 153.75.16.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260423","retrieved_at":"2026-10-09T19:00:20+00:00","summary":"ARIN delegated statistics 2026-04-23 (produced 2026-04-23T13:00:40+00:00), before the report: allocated (dated 1991-09-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260425","retrieved_at":"2026-10-09T19:00:25+00:00","summary":"ARIN delegated statistics 2026-04-25 (produced 2026-04-25T13:00:38+00:00), after the report: allocated (dated 2026-04-24)"}]}],"classification_history":{"3f4504fda971595c":[{"raw_change_id":1823,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from NCR Voyix Corporation (ARIN) to Rio Blanco County, CO (ARIN) on 2026-04-24 17:17 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]}}