{"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":"140.145.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/140.145.0.0-140.145.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-03-29)"},"current_holder":{"rir":"ARIN","org":"Amazon Technologies Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":17235,"date":"2019-03-29T15:07:09Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Computer Sciences Corporation","recipient_org":"Amazon Technologies Inc.","range":"140.145.0.0/16","log":"ARIN"},{"id":16636,"date":"2018-12-12T20:13:55Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"TRW Financial Systems","recipient_org":"Computer Sciences Corporation","range":"140.145.0.0/16","log":"ARIN"}],"events":[{"event_id":"ea0512c9ec1870c2","registry":"ARIN","report_date":"2019-03-29","source":"arin_issued","raw_action":"ADD","raw_line":"Add 140.145.0.0-140.145.255.255","resource_type":"ipv4","resource":"140.145.0.0/16","start":"140.145.0.0","end":"140.145.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Computer Sciences Corporation","recipient_organization":"Amazon Technologies Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:28+00:00","page":"https://rirtracker.com/ip/140.145.0.0-140.145.255.255/#e-ea0512c9ec1870c2","report_page":"https://rirtracker.com/arin/reports/2019-03-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/140.145.0.0-140.145.255.255.json","explanation":"ARIN's transfer log records a transfer from Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-03-29 15:07 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/2019-March/003761.html","retrieved_at":"2026-10-12T18:40:24+00:00","summary":"ARIN-Issued report for 2019-03-29: \"Add 140.145.0.0-140.145.255.255\""},{"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 2019-03-29 15:07 UTC, Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN); resources moved: 140.145.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190328.gz","retrieved_at":"2026-10-12T22:02:29+00:00","summary":"ARIN delegated statistics 2019-03-28 (produced 2019-03-28T05:00:13+00:00), before the report: assigned (dated 1990-04-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190330.gz","retrieved_at":"2026-10-12T22:02:41+00:00","summary":"ARIN delegated statistics 2019-03-30 (produced 2019-03-30T05:00:12+00:00), after the report: allocated (dated 2019-03-29)"}]},{"event_id":"9b5c3a1d9d234103","registry":"ARIN","report_date":"2018-12-12","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"140.145.0.0/16","start":"140.145.0.0","end":"140.145.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"TRW Financial Systems","recipient_organization":"Computer Sciences Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:42+00:00","page":"https://rirtracker.com/ip/140.145.0.0-140.145.255.255/#e-9b5c3a1d9d234103","report_page":"https://rirtracker.com/arin/reports/2018-12-12/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/140.145.0.0-140.145.255.255.json","observed":"Merger/acquisition: TRW Financial Systems (ARIN) to Computer Sciences Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from TRW Financial Systems (ARIN) to Computer Sciences Corporation (ARIN) on 2018-12-12 20:13 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 2018-12-12 20:13 UTC, TRW Financial Systems (ARIN) to Computer Sciences Corporation (ARIN); resources moved: 140.145.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181211.gz","retrieved_at":"2026-10-12T21:56:59+00:00","summary":"ARIN delegated statistics 2018-12-11 (produced 2018-12-11T06:00:12+00:00), before the report: assigned (dated 1990-04-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20181213.gz","retrieved_at":"2026-10-12T21:57:04+00:00","summary":"ARIN delegated statistics 2018-12-13 (produced 2018-12-13T06:00:12+00:00), after the report: assigned (dated 1990-04-24)"}]}],"classification_history":{"ea0512c9ec1870c2":[{"raw_change_id":159188,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:43:58+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-03-29 15:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159188,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:31+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-03-29 15:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159188,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:14+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-03-29 15:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159188,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:28+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Computer Sciences Corporation (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-03-29 15:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"9b5c3a1d9d234103":[{"raw_change_id":557705,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:42+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from TRW Financial Systems (ARIN) to Computer Sciences Corporation (ARIN) on 2018-12-12 20:13 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 2019-03-29)"}}