{"classifier_version":"1.4.0","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by ARIN, the RIPE NCC, APNIC, LACNIC, AFRINIC, the Number Resource Organization (NRO), or any other 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":"AS31897","resource_type":"asn","page":"https://rirtracker.com/asn/31897/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2004-01-20)"},"current_holder":{"rir":"ARIN","org":"Summa Health","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":5277,"date":"2026-09-29T20:54:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"SUMMACARE HEALTH PLAN","recipient_org":"Summa Health","range":"AS31897","log":"ARIN"}],"events":[{"event_id":"38a06cd9edb11ddd","registry":"ARIN","report_date":"2026-09-29","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS31897","start":31897,"end":31897,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"SUMMACARE HEALTH PLAN","recipient_organization":"Summa Health","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:31+00:00","page":"https://rirtracker.com/asn/31897/#e-38a06cd9edb11ddd","report_page":"https://rirtracker.com/arin/reports/2026-09-29/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/31897.json","observed":"Merger/acquisition: SUMMACARE HEALTH PLAN (ARIN) to Summa Health (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from SUMMACARE HEALTH PLAN (ARIN) to Summa Health (ARIN) on 2026-09-29 20:54 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.","evidence":[{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-13T13:57:20+00:00","summary":"Transfer log: MERGER_ACQUISITION on 2026-09-29 20:54 UTC, SUMMACARE HEALTH PLAN (ARIN) to Summa Health (ARIN); resources moved: AS31897"},{"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: assigned (dated 2004-01-20)"},{"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: assigned (dated 2004-01-20)"}]}],"classification_history":{"38a06cd9edb11ddd":[{"raw_change_id":577423,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:31+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from SUMMACARE HEALTH PLAN (ARIN) to Summa Health (ARIN) on 2026-09-29 20:54 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it."}]},"arin_statistics_now":{"status":"assigned (dated 2004-01-20)"}}