{"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":"144.207.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.207.0.0-144.207.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-06-28)"},"current_holder":{"rir":"ARIN","org":"Amazon Technologies Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18357,"date":"2019-06-28T11:34:50Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"AECOM","recipient_org":"Amazon Technologies Inc.","range":"144.207.0.0/16","log":"ARIN"},{"id":17931,"date":"2019-05-20T08:44:29Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Woodward-Clyde Consultants","recipient_org":"AECOM","range":"144.207.0.0/16","log":"ARIN"}],"events":[{"event_id":"ea4ae14c04863e56","registry":"ARIN","report_date":"2019-06-28","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.207.0.0-144.207.255.255","resource_type":"ipv4","resource":"144.207.0.0/16","start":"144.207.0.0","end":"144.207.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"AECOM","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":"2026-10-13T23:52:32+00:00","page":"https://rirtracker.com/ip/144.207.0.0-144.207.255.255/#e-ea4ae14c04863e56","report_page":"https://rirtracker.com/arin/reports/2019-06-28/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.207.0.0-144.207.255.255.json","explanation":"ARIN's transfer log records a transfer from AECOM (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-06-28 11:34 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-June/003852.html","retrieved_at":"2026-10-12T18:40:31+00:00","summary":"ARIN-Issued report for 2019-06-28: \"Add 144.207.0.0-144.207.255.255\""},{"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 2019-06-28 11:34 UTC, AECOM (ARIN) to Amazon Technologies Inc. (ARIN); resources moved: 144.207.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190627.gz","retrieved_at":"2026-10-12T22:07:13+00:00","summary":"ARIN delegated statistics 2019-06-27 (produced 2019-06-27T14:00:16+00:00), before the report: assigned (dated 1990-12-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190629.gz","retrieved_at":"2026-10-12T22:07:18+00:00","summary":"ARIN delegated statistics 2019-06-29 (produced 2019-06-29T14:00:17+00:00), after the report: allocated (dated 2019-06-28)"}]},{"event_id":"c24ef6e8ad95f307","registry":"ARIN","report_date":"2019-05-20","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"144.207.0.0/16","start":"144.207.0.0","end":"144.207.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Woodward-Clyde Consultants","recipient_organization":"AECOM","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:45+00:00","page":"https://rirtracker.com/ip/144.207.0.0-144.207.255.255/#e-c24ef6e8ad95f307","report_page":"https://rirtracker.com/arin/reports/2019-05-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.207.0.0-144.207.255.255.json","observed":"Merger/acquisition: Woodward-Clyde Consultants (ARIN) to AECOM (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Woodward-Clyde Consultants (ARIN) to AECOM (ARIN) on 2019-05-20 08:44 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 2019-05-20 08:44 UTC, Woodward-Clyde Consultants (ARIN) to AECOM (ARIN); resources moved: 144.207.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190519.gz","retrieved_at":"2026-10-12T22:05:14+00:00","summary":"ARIN delegated statistics 2019-05-19 (produced 2019-05-19T14:00:16+00:00), before the report: assigned (dated 1990-12-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190521.gz","retrieved_at":"2026-10-12T22:05:19+00:00","summary":"ARIN delegated statistics 2019-05-21 (produced 2019-05-21T05:00:17+00:00), after the report: assigned (dated 1990-12-20)"}]}],"classification_history":{"ea4ae14c04863e56":[{"raw_change_id":160173,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:44:39+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from AECOM (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-06-28 11:34 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160173,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:34+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from AECOM (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-06-28 11:34 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160173,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:17+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from AECOM (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-06-28 11:34 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160173,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:32+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from AECOM (ARIN) to Amazon Technologies Inc. (ARIN) on 2019-06-28 11:34 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"c24ef6e8ad95f307":[{"raw_change_id":558705,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:45+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Woodward-Clyde Consultants (ARIN) to AECOM (ARIN) on 2019-05-20 08:44 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 2019-06-28)"}}