{"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":"207.45.16.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/207.45.16.0-207.45.23.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-07-01)"},"current_holder":{"rir":"ARIN","org":"Cisco IoT","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":40839,"date":"2025-07-01T19:32:10Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"T-Mobile USA, Inc.","recipient_org":"Cisco IoT","range":"207.45.16.0/21","log":"ARIN"},{"id":40609,"date":"2025-06-13T18:47:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Cox California PCS","recipient_org":"T-Mobile USA, Inc.","range":"207.45.0.0/19","log":"ARIN"}],"events":[{"event_id":"a801f58f26cc4451","registry":"ARIN","report_date":"2025-07-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add 207.45.16.0-207.45.23.255","resource_type":"ipv4","resource":"207.45.16.0/21","start":"207.45.16.0","end":"207.45.23.255","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":"Cisco IoT","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:31+00:00","page":"https://rirtracker.com/ip/207.45.16.0-207.45.23.255/#e-a801f58f26cc4451","report_page":"https://rirtracker.com/arin/reports/2025-07-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/207.45.16.0-207.45.23.255.json","piece_of":{"resource":"207.45.0.0/19","page":"https://rirtracker.com/ip/207.45.0.0-207.45.31.255/"},"explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN) on 2025-07-01 19:32 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-July/006044.html","retrieved_at":"2026-10-12T18:43:05+00:00","summary":"ARIN-Issued report for 2025-07-01: \"Add 207.45.16.0-207.45.23.255\""},{"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 2025-07-01 19:32 UTC, T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN); resources moved: 207.45.16.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250630.gz","retrieved_at":"2026-10-13T00:02:34+00:00","summary":"ARIN delegated statistics 2025-06-30 (produced 2025-06-30T13:01:12+00:00), before the report: allocated (dated 1996-02-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250702.gz","retrieved_at":"2026-10-13T00:02:39+00:00","summary":"ARIN delegated statistics 2025-07-02 (produced 2025-07-02T13:01:11+00:00), after the report: allocated (dated 2025-07-01)"}]}],"classification_history":{"a801f58f26cc4451":[{"raw_change_id":194831,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:07:05+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN) on 2025-07-01 19:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194831,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:03+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN) on 2025-07-01 19:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194831,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:57+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN) on 2025-07-01 19:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194831,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:31+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from T-Mobile USA, Inc. (ARIN) to Cisco IoT (ARIN) on 2025-07-01 19:32 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2025-07-01)"}}