{"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":"209.162.221.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/209.162.221.0-209.162.221.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-07-28)"},"current_holder":{"rir":"ARIN","org":"Concentra Health Services, Inc.","how":"ARIN's statistics for 2026-10-09 and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":44896,"date":"2026-07-28T17:51:13Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Digital Fortress","recipient_org":"Concentra Health Services, Inc.","range":"209.162.221.0/24"},{"id":25069,"date":"2021-07-09T16:51:19Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Atmosera, Inc.","recipient_org":"Digital Fortress","range":"209.162.208.0/20"}],"events":[{"event_id":"6a73ea5e75c6356d","report_date":"2026-07-28","source":"arin_issued","raw_action":"ADD","raw_line":"Add 209.162.221.0-209.162.221.255","resource_type":"ipv4","resource":"209.162.221.0/24","start":"209.162.221.0","end":"209.162.221.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Digital Fortress","recipient_organization":"Concentra Health Services, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:23+00:00","page":"https://rirtracker.com/ip/209.162.221.0-209.162.221.255/#e-6a73ea5e75c6356d","evidence_url":"https://rirtracker.com/api/v1/events/6a73ea5e75c6356d.json","piece_of":{"resource":"209.162.208.0/20","page":"https://rirtracker.com/ip/209.162.208.0-209.162.223.255/"},"explanation":"ARIN's transfer log records a transfer from Digital Fortress (ARIN) to Concentra Health Services, Inc. (ARIN) on 2026-07-28 17:51 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-July/006440.html","retrieved_at":"2026-10-09T18:54:05+00:00","summary":"ARIN-Issued report for 2026-07-28: \"Add 209.162.221.0-209.162.221.255\""},{"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 2026-07-28 17:51 UTC, Digital Fortress (ARIN) to Concentra Health Services, Inc. (ARIN); resources moved: 209.162.221.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260727","retrieved_at":"2026-10-09T19:05:10+00:00","summary":"ARIN delegated statistics 2026-07-27 (produced 2026-07-27T09:00:20+00:00), before the report: allocated (dated 1997-11-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260729","retrieved_at":"2026-10-09T19:05:16+00:00","summary":"ARIN delegated statistics 2026-07-29 (produced 2026-07-29T13:00:20+00:00), after the report: allocated (dated 2026-07-28)"}]}],"classification_history":{"6a73ea5e75c6356d":[{"raw_change_id":3997,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:23+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Digital Fortress (ARIN) to Concentra Health Services, Inc. (ARIN) on 2026-07-28 17:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]}}