{"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":"144.215.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.215.0.0-144.215.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1991-01-15)"},"current_holder":{"rir":"ARIN","org":"Citigroup Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":34256,"date":"2024-01-31T18:27:34Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Transaction Technology Inc.","recipient_org":"Citigroup Inc.","range":"144.215.0.0/16","log":"ARIN"}],"events":[{"event_id":"b80fe2e68e7039b3","registry":"ARIN","report_date":"2024-01-31","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"144.215.0.0/16","start":"144.215.0.0","end":"144.215.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Transaction Technology Inc.","recipient_organization":"Citigroup Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","page":"https://rirtracker.com/ip/144.215.0.0-144.215.255.255/#e-b80fe2e68e7039b3","report_page":"https://rirtracker.com/arin/reports/2024-01-31/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.215.0.0-144.215.255.255.json","observed":"Merger/acquisition: Transaction Technology Inc. (ARIN) to Citigroup Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Transaction Technology Inc. (ARIN) to Citigroup Inc. (ARIN) on 2024-01-31 18:27 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 2024-01-31 18:27 UTC, Transaction Technology Inc. (ARIN) to Citigroup Inc. (ARIN); resources moved: 144.215.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240130.gz","retrieved_at":"2026-10-12T23:34:25+00:00","summary":"ARIN delegated statistics 2024-01-30 (produced 2024-01-30T14:00:44+00:00), before the report: allocated (dated 1991-01-15)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240201.gz","retrieved_at":"2026-10-12T23:34:30+00:00","summary":"ARIN delegated statistics 2024-02-01 (produced 2024-02-01T14:00:43+00:00), after the report: allocated (dated 1991-01-15)"}]}],"classification_history":{"b80fe2e68e7039b3":[{"raw_change_id":569985,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Transaction Technology Inc. (ARIN) to Citigroup Inc. (ARIN) on 2024-01-31 18:27 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 1991-01-15)"}}