{"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":"72.56.0.0/13","resource_type":"ipv4","page":"https://rirtracker.com/ip/72.56.0.0-72.63.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2008-02-26), allocated (dated 2025-07-30), allocated (dated 2025-09-08), allocated (dated 2025-11-26)"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":42117,"date":"2025-11-26T16:58:19Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Metronet","range":"72.58.0.0/16","log":"ARIN"},{"id":42118,"date":"2025-11-26T16:58:19Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Metronet","range":"72.59.0.0/16","log":"ARIN"},{"id":41232,"date":"2025-09-09T16:07:50Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"T-Mobile USA, Inc.","recipient_org":"ORG-SNCL3-AP","range":"72.57.128.0/17","log":"ARIN"},{"id":131246,"date":"2025-09-09T08:57:22Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"TMOBI","recipient_org":"Skyline Networks Company Limited","range":"72.57.128.0/17","log":"APNIC"},{"id":41225,"date":"2025-09-08T11:33:39Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"B2 Net Solutions Inc.","range":"72.57.64.0/18","log":"ARIN"},{"id":114649,"date":"2025-08-11T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Net Inc.","range":"72.56.0.0/16","log":"RIPE NCC"},{"id":41081,"date":"2025-08-11T14:25:25Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"ORG-NI139-RIPE. Net Inc.","range":"72.56.0.0/16","log":"ARIN"},{"id":41031,"date":"2025-07-30T11:10:14Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"BIF IV","range":"72.57.0.0/19","log":"ARIN"},{"id":113315,"date":"2025-06-03T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Hostinger Operations, UAB","range":"72.60.0.0/16","log":"RIPE NCC"},{"id":113316,"date":"2025-06-03T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Hostinger Operations, UAB","range":"72.61.0.0/16","log":"RIPE NCC"},{"id":113317,"date":"2025-06-03T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Hostinger Operations, UAB","range":"72.62.0.0/16","log":"RIPE NCC"},{"id":113318,"date":"2025-06-03T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"UAB code200","range":"72.63.0.0/16","log":"RIPE NCC"},{"id":40543,"date":"2025-06-03T14:28:23Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"code200, UAB","range":"72.63.0.0/16","log":"ARIN"},{"id":40523,"date":"2025-06-03T14:09:25Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"Hostinger Operations UAB","range":"72.60.0.0/16","log":"ARIN"},{"id":40522,"date":"2025-06-03T14:09:25Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"Hostinger Operations UAB","range":"72.61.0.0/16","log":"ARIN"},{"id":40521,"date":"2025-06-03T14:09:25Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"Hostinger Operations UAB","range":"72.62.0.0/16","log":"ARIN"},{"id":22422,"date":"2020-12-31T20:17:58Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sprint Communications, Inc.","recipient_org":"T-Mobile USA, Inc.","range":"72.56.0.0/13","log":"ARIN"}],"events":[{"event_id":"3bd271aa4d7c4d95","registry":"ARIN","report_date":"2020-12-31","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"72.56.0.0/13","start":"72.56.0.0","end":"72.63.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sprint Communications, Inc.","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":"2026-10-14T00:18:52+00:00","page":"https://rirtracker.com/ip/72.56.0.0-72.63.255.255/#e-3bd271aa4d7c4d95","report_page":"https://rirtracker.com/arin/reports/2020-12-31/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.56.0.0-72.63.255.255.json","observed":"Merger/acquisition: Sprint Communications, Inc. (ARIN) to T-Mobile USA, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sprint Communications, Inc. (ARIN) to T-Mobile USA, Inc. (ARIN) on 2020-12-31 20:17 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 2020-12-31 20:17 UTC, Sprint Communications, Inc. (ARIN) to T-Mobile USA, Inc. (ARIN); resources moved: 72.56.0.0/13"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20201230.gz","retrieved_at":"2026-10-12T22:35:49+00:00","summary":"ARIN delegated statistics 2020-12-30 (produced 2020-12-30T15:00:14+00:00), before the report: allocated (dated 2008-02-26)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210101.gz","retrieved_at":"2026-10-12T22:36:00+00:00","summary":"ARIN delegated statistics 2021-01-01 (produced 2021-01-01T15:00:13+00:00), after the report: allocated (dated 2008-02-26)"}]}],"classification_history":{"3bd271aa4d7c4d95":[{"raw_change_id":561553,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:52+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sprint Communications, Inc. (ARIN) to T-Mobile USA, Inc. (ARIN) on 2020-12-31 20:17 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 2008-02-26), allocated (dated 2025-07-30), allocated (dated 2025-09-08), allocated (dated 2025-11-26)"}}