{"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":"148.52.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/148.52.0.0-148.52.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-06-27), allocated (dated 2025-09-09)"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":120859,"date":"2026-05-26T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Prostie Reshenia LLC","range":"148.52.128.0/19","log":"RIPE NCC"},{"id":44036,"date":"2026-05-26T14:04:14Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"Prostie Reshenia LLC","range":"148.52.128.0/19","log":"ARIN"},{"id":115737,"date":"2025-10-20T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Saudi Telecom Company JSC","range":"148.52.0.0/17","log":"RIPE NCC"},{"id":41746,"date":"2025-10-20T13:21:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"T-Mobile USA, Inc.","recipient_org":"Saudi Telecom Company JSC","range":"148.52.0.0/17","log":"ARIN"},{"id":41238,"date":"2025-09-09T19:24:52Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Cisco IoT","range":"148.52.160.0/19","log":"ARIN"},{"id":40826,"date":"2025-06-27T12:44:31Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Clarity Telecom LLC","range":"148.52.192.0/18","log":"ARIN"},{"id":40461,"date":"2025-05-22T16:33:34Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"US Sprint, Government Systems Division","recipient_org":"T-Mobile USA, Inc.","range":"148.52.0.0/16","log":"ARIN"}],"events":[{"event_id":"53ebfae700cf9cfd","registry":"ARIN","report_date":"2025-05-22","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"148.52.0.0/16","start":"148.52.0.0","end":"148.52.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"US Sprint, Government Systems Division","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":"2026-10-14T00:19:22+00:00","page":"https://rirtracker.com/ip/148.52.0.0-148.52.255.255/#e-53ebfae700cf9cfd","report_page":"https://rirtracker.com/arin/reports/2025-05-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/148.52.0.0-148.52.255.255.json","observed":"Merger/acquisition: US Sprint, Government Systems Division (ARIN) to T-Mobile USA, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from US Sprint, Government Systems Division (ARIN) to T-Mobile USA, Inc. (ARIN) on 2025-05-22 16:33 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 2025-05-22 16:33 UTC, US Sprint, Government Systems Division (ARIN) to T-Mobile USA, Inc. (ARIN); resources moved: 148.52.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250521.gz","retrieved_at":"2026-10-13T00:00:14+00:00","summary":"ARIN delegated statistics 2025-05-21 (produced 2025-05-21T13:01:11+00:00), before the report: allocated (dated 1991-02-28)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250523.gz","retrieved_at":"2026-10-13T00:00:19+00:00","summary":"ARIN delegated statistics 2025-05-23 (produced 2025-05-23T13:01:13+00:00), after the report: allocated (dated 1991-02-28)"}]}],"classification_history":{"53ebfae700cf9cfd":[{"raw_change_id":573687,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:22+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from US Sprint, Government Systems Division (ARIN) to T-Mobile USA, Inc. (ARIN) on 2025-05-22 16:33 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 2025-06-27), allocated (dated 2025-09-09)"}}