{"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":"139.48.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/139.48.0.0-139.48.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1990-06-20)"},"current_holder":{"rir":"ARIN","org":"Alberta Health Services","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":8151,"date":"2016-11-02T19:21:18Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Calgary Regional Health Authority","recipient_org":"Alberta Health Services","range":"139.48.0.0/16","log":"ARIN"}],"events":[{"event_id":"f90c087065debdaa","registry":"ARIN","report_date":"2016-11-02","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"139.48.0.0/16","start":"139.48.0.0","end":"139.48.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Calgary Regional Health Authority","recipient_organization":"Alberta Health Services","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:27+00:00","page":"https://rirtracker.com/ip/139.48.0.0-139.48.255.255/#e-f90c087065debdaa","report_page":"https://rirtracker.com/arin/reports/2016-11-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/139.48.0.0-139.48.255.255.json","observed":"Merger/acquisition: Calgary Regional Health Authority (ARIN) to Alberta Health Services (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Calgary Regional Health Authority (ARIN) to Alberta Health Services (ARIN) on 2016-11-02 19:21 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 2016-11-02 19:21 UTC, Calgary Regional Health Authority (ARIN) to Alberta Health Services (ARIN); resources moved: 139.48.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161101.gz","retrieved_at":"2026-10-12T21:18:43+00:00","summary":"ARIN delegated statistics 2016-11-01 (produced 2016-11-01T05:09:34+00:00), before the report: assigned (dated 1990-06-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161103.gz","retrieved_at":"2026-10-12T21:18:48+00:00","summary":"ARIN delegated statistics 2016-11-03 (produced 2016-11-03T05:09:28+00:00), after the report: assigned (dated 1990-06-20)"}]}],"classification_history":{"f90c087065debdaa":[{"raw_change_id":551064,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:27+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Calgary Regional Health Authority (ARIN) to Alberta Health Services (ARIN) on 2016-11-02 19:21 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":"allocated (dated 1990-06-20)"}}