{"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":"AS4167","resource_type":"asn","page":"https://rirtracker.com/asn/4167/","arin_statistics_now":{"file_date":"2026-10-09","status":"assigned (dated 2026-03-03)"},"current_holder":{"rir":"ARIN","org":"Anthropic, PBC","how":"ARIN's statistics for 2026-10-09 and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":4956,"date":"2026-03-03T13:36:18Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EpicUp Holdings Inc","recipient_org":"Anthropic, PBC","range":"AS4167"},{"id":4913,"date":"2026-02-09T21:19:39Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Connectsoft Commercial Network Services","recipient_org":"EpicUp Holdings Inc","range":"AS4167"}],"events":[{"event_id":"f3bce8faa36e38de","report_date":"2026-03-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS4167","resource_type":"asn","resource":"AS4167","start":4167,"end":4167,"classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"EpicUp Holdings Inc","recipient_organization":"Anthropic, PBC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:18+00:00","page":"https://rirtracker.com/asn/4167/#e-f3bce8faa36e38de","evidence_url":"https://rirtracker.com/api/v1/events/f3bce8faa36e38de.json","explanation":"ARIN's transfer log records a transfer from EpicUp Holdings Inc (ARIN) to Anthropic, PBC (ARIN) on 2026-03-03 13:36 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-March/006289.html","retrieved_at":"2026-10-09T18:53:56+00:00","summary":"ARIN-Issued report for 2026-03-03: \"Add AS4167\""},{"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 2026-03-03 13:36 UTC, EpicUp Holdings Inc (ARIN) to Anthropic, PBC (ARIN); resources moved: AS4167"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260302","retrieved_at":"2026-10-09T18:57:29+00:00","summary":"ARIN delegated statistics 2026-03-02 (produced 2026-03-02T14:00:50+00:00), before the report: assigned (dated 1994-12-15)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260304","retrieved_at":"2026-10-09T18:57:36+00:00","summary":"ARIN delegated statistics 2026-03-04 (produced 2026-03-04T14:00:50+00:00), after the report: assigned (dated 2026-03-03)"}]}],"classification_history":{"f3bce8faa36e38de":[{"raw_change_id":991,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:18+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from EpicUp Holdings Inc (ARIN) to Anthropic, PBC (ARIN) on 2026-03-03 13:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]}}