{"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":"157.123.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/157.123.0.0-157.123.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2024-03-29)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":35145,"date":"2024-03-29T14:00:33Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"NEC Corporation of America","recipient_org":"Amazon.com, Inc.","range":"157.123.0.0/16","log":"ARIN"},{"id":32754,"date":"2023-08-21T18:12:20Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Zenith Data Systems","recipient_org":"NEC Corporation of America","range":"157.123.0.0/16","log":"ARIN"}],"events":[{"event_id":"8fce956af7196d11","registry":"ARIN","report_date":"2024-03-29","source":"arin_issued","raw_action":"ADD","raw_line":"Add 157.123.0.0-157.123.255.255","resource_type":"ipv4","resource":"157.123.0.0/16","start":"157.123.0.0","end":"157.123.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"NEC Corporation of America","recipient_organization":"Amazon.com, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:01+00:00","page":"https://rirtracker.com/ip/157.123.0.0-157.123.255.255/#e-8fce956af7196d11","report_page":"https://rirtracker.com/arin/reports/2024-03-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/157.123.0.0-157.123.255.255.json","explanation":"ARIN's transfer log records a transfer from NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-29 14:00 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/2024-March/005586.html","retrieved_at":"2026-10-12T18:42:31+00:00","summary":"ARIN-Issued report for 2024-03-29: \"Add 157.123.0.0-157.123.255.255\""},{"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 2024-03-29 14:00 UTC, NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN); resources moved: 157.123.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240328.gz","retrieved_at":"2026-10-12T23:37:32+00:00","summary":"ARIN delegated statistics 2024-03-28 (produced 2024-03-28T13:00:50+00:00), before the report: allocated (dated 1991-12-30)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240330.gz","retrieved_at":"2026-10-12T23:37:37+00:00","summary":"ARIN delegated statistics 2024-03-30 (produced 2024-03-30T13:00:52+00:00), after the report: allocated (dated 2024-03-29)"}]},{"event_id":"08bd6360aa7a7e9c","registry":"ARIN","report_date":"2023-08-21","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"157.123.0.0/16","start":"157.123.0.0","end":"157.123.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Zenith Data Systems","recipient_organization":"NEC Corporation of America","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:10+00:00","page":"https://rirtracker.com/ip/157.123.0.0-157.123.255.255/#e-08bd6360aa7a7e9c","report_page":"https://rirtracker.com/arin/reports/2023-08-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/157.123.0.0-157.123.255.255.json","observed":"Merger/acquisition: Zenith Data Systems (ARIN) to NEC Corporation of America (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Zenith Data Systems (ARIN) to NEC Corporation of America (ARIN) on 2023-08-21 18:12 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 2023-08-21 18:12 UTC, Zenith Data Systems (ARIN) to NEC Corporation of America (ARIN); resources moved: 157.123.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230820.gz","retrieved_at":"2026-10-12T23:25:43+00:00","summary":"ARIN delegated statistics 2023-08-20 (produced 2023-08-20T13:00:13+00:00), before the report: allocated (dated 1991-12-30)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230822.gz","retrieved_at":"2026-10-12T23:25:48+00:00","summary":"ARIN delegated statistics 2023-08-22 (produced 2023-08-22T13:00:13+00:00), after the report: allocated (dated 1991-12-30)"}]}],"classification_history":{"8fce956af7196d11":[{"raw_change_id":186358,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:01:39+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-29 14:00 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186358,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:41+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-29 14:00 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186358,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:32+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-29 14:00 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186358,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:01+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from NEC Corporation of America (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-29 14:00 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"08bd6360aa7a7e9c":[{"raw_change_id":568985,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:10+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Zenith Data Systems (ARIN) to NEC Corporation of America (ARIN) on 2023-08-21 18:12 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 2024-03-29)"}}