{"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":"144.225.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.225.0.0-144.225.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-04-07)"},"current_holder":{"rir":"ARIN","org":"Ace Data Centers II, L.L.C.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":39943,"date":"2025-04-07T10:32:07Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Ace Data Centers II, L.L.C.","range":"144.225.0.0/16","log":"ARIN"},{"id":30341,"date":"2023-01-26T22:36:54Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sprint","recipient_org":"T-Mobile USA, Inc.","range":"144.225.0.0/16","log":"ARIN"}],"events":[{"event_id":"6947197ae7274fa2","registry":"ARIN","report_date":"2025-04-07","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.225.0.0-144.225.255.255","resource_type":"ipv4","resource":"144.225.0.0/16","start":"144.225.0.0","end":"144.225.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"T-Mobile USA, Inc.","recipient_organization":"Ace Data Centers II, L.L.C.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:26+00:00","page":"https://rirtracker.com/ip/144.225.0.0-144.225.255.255/#e-6947197ae7274fa2","report_page":"https://rirtracker.com/arin/reports/2025-04-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.225.0.0-144.225.255.255.json","explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN) on 2025-04-07 10:32 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/2025-April/005959.html","retrieved_at":"2026-10-12T18:42:59+00:00","summary":"ARIN-Issued report for 2025-04-07: \"Add 144.225.0.0-144.225.255.255\""},{"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: RESOURCE_TRANSFER on 2025-04-07 10:32 UTC, T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN); resources moved: 144.225.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250406.gz","retrieved_at":"2026-10-12T23:57:43+00:00","summary":"ARIN delegated statistics 2025-04-06 (produced 2025-04-06T13:01:09+00:00), before the report: allocated (dated 1991-01-11)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250408.gz","retrieved_at":"2026-10-12T23:57:48+00:00","summary":"ARIN delegated statistics 2025-04-08 (produced 2025-04-08T13:01:09+00:00), after the report: allocated (dated 2025-04-07)"}]},{"event_id":"82df66ffe139641a","registry":"ARIN","report_date":"2023-01-26","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"144.225.0.0/16","start":"144.225.0.0","end":"144.225.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sprint","recipient_organization":"T-Mobile USA, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:06+00:00","page":"https://rirtracker.com/ip/144.225.0.0-144.225.255.255/#e-82df66ffe139641a","report_page":"https://rirtracker.com/arin/reports/2023-01-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.225.0.0-144.225.255.255.json","observed":"Merger/acquisition: Sprint (ARIN) to T-Mobile USA, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sprint (ARIN) to T-Mobile USA, Inc. (ARIN) on 2023-01-26 22:36 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 2023-01-26 22:36 UTC, Sprint (ARIN) to T-Mobile USA, Inc. (ARIN); resources moved: 144.225.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230125.gz","retrieved_at":"2026-10-12T23:14:45+00:00","summary":"ARIN delegated statistics 2023-01-25 (produced 2023-01-25T14:00:10+00:00), before the report: allocated (dated 1991-01-11)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230127.gz","retrieved_at":"2026-10-12T23:14:59+00:00","summary":"ARIN delegated statistics 2023-01-27 (produced 2023-01-27T14:00:11+00:00), after the report: allocated (dated 1991-01-11)"}]}],"classification_history":{"6947197ae7274fa2":[{"raw_change_id":193585,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:06:25+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN) on 2025-04-07 10:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":193585,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:59+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN) on 2025-04-07 10:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":193585,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:53+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN) on 2025-04-07 10:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":193585,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:26+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Ace Data Centers II, L.L.C. (ARIN) on 2025-04-07 10:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"82df66ffe139641a":[{"raw_change_id":567276,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:06+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sprint (ARIN) to T-Mobile USA, Inc. (ARIN) on 2023-01-26 22:36 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 2025-04-07)"}}