{"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":"158.151.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/158.151.0.0-158.151.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2024-10-21)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":36979,"date":"2024-10-21T16:08:54Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"The Dun & Bradstreet Corporation","recipient_org":"Amazon.com, Inc.","range":"158.151.0.0/16","log":"ARIN"},{"id":21170,"date":"2020-07-31T19:26:46Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"The Dun & Bradstreet Corporation","recipient_org":"The Dun & Bradstreet Corporation","range":"158.151.0.0/16","log":"ARIN"}],"events":[{"event_id":"1153c6337dd87aff","registry":"ARIN","report_date":"2024-10-21","source":"arin_issued","raw_action":"ADD","raw_line":"Add 158.151.0.0-158.151.255.255","resource_type":"ipv4","resource":"158.151.0.0/16","start":"158.151.0.0","end":"158.151.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"The Dun & Bradstreet Corporation","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":"2026-10-13T23:54:13+00:00","page":"https://rirtracker.com/ip/158.151.0.0-158.151.255.255/#e-1153c6337dd87aff","report_page":"https://rirtracker.com/arin/reports/2024-10-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.151.0.0-158.151.255.255.json","explanation":"ARIN's transfer log records a transfer from The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN) on 2024-10-21 16:08 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-October/005791.html","retrieved_at":"2026-10-12T18:42:46+00:00","summary":"ARIN-Issued report for 2024-10-21: \"Add 158.151.0.0-158.151.255.255\""},{"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 2024-10-21 16:08 UTC, The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN); resources moved: 158.151.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241020.gz","retrieved_at":"2026-10-12T23:48:37+00:00","summary":"ARIN delegated statistics 2024-10-20 (produced 2024-10-20T13:00:54+00:00), before the report: allocated (dated 1992-03-13)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241022.gz","retrieved_at":"2026-10-12T23:48:42+00:00","summary":"ARIN delegated statistics 2024-10-22 (produced 2024-10-22T13:00:53+00:00), after the report: allocated (dated 2024-10-21)"}]},{"event_id":"9577c2fb18a24c25","registry":"ARIN","report_date":"2020-07-31","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"158.151.0.0/16","start":"158.151.0.0","end":"158.151.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"The Dun & Bradstreet Corporation","recipient_organization":"The Dun & Bradstreet Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:50+00:00","page":"https://rirtracker.com/ip/158.151.0.0-158.151.255.255/#e-9577c2fb18a24c25","report_page":"https://rirtracker.com/arin/reports/2020-07-31/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.151.0.0-158.151.255.255.json","observed":"Merger/acquisition: The Dun & Bradstreet Corporation (ARIN) to The Dun & Bradstreet Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from The Dun & Bradstreet Corporation (ARIN) to The Dun & Bradstreet Corporation (ARIN) on 2020-07-31 19:26 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 2020-07-31 19:26 UTC, The Dun & Bradstreet Corporation (ARIN) to The Dun & Bradstreet Corporation (ARIN); resources moved: 158.151.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200730.gz","retrieved_at":"2026-10-12T22:27:51+00:00","summary":"ARIN delegated statistics 2020-07-30 (produced 2020-07-30T14:00:13+00:00), before the report: assigned (dated 1992-03-13)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200801.gz","retrieved_at":"2026-10-12T22:28:06+00:00","summary":"ARIN delegated statistics 2020-08-01 (produced 2020-08-01T14:00:12+00:00), after the report: assigned (dated 1992-03-13)"}]}],"classification_history":{"1153c6337dd87aff":[{"raw_change_id":189875,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:03:40+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN) on 2024-10-21 16:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":189875,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:50+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN) on 2024-10-21 16:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":189875,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:43+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN) on 2024-10-21 16:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":189875,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:13+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from The Dun & Bradstreet Corporation (ARIN) to Amazon.com, Inc. (ARIN) on 2024-10-21 16:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"9577c2fb18a24c25":[{"raw_change_id":560759,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:50+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from The Dun & Bradstreet Corporation (ARIN) to The Dun & Bradstreet Corporation (ARIN) on 2020-07-31 19:26 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 2024-10-21)"}}