{"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":"146.181.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/146.181.0.0-146.181.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2024-04-11)"},"current_holder":{"rir":"ARIN","org":"Oracle Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":35230,"date":"2024-04-11T17:48:41Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Century Aluminum Company","recipient_org":"Oracle Corporation","range":"146.181.0.0/16","log":"ARIN"},{"id":34878,"date":"2024-03-18T12:58:57Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Alumax of South Carolina","recipient_org":"Century Aluminum Company","range":"146.181.0.0/16","log":"ARIN"}],"events":[{"event_id":"bc079dcb6df37116","registry":"ARIN","report_date":"2024-04-11","source":"arin_issued","raw_action":"ADD","raw_line":"Add 146.181.0.0-146.181.255.255","resource_type":"ipv4","resource":"146.181.0.0/16","start":"146.181.0.0","end":"146.181.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Century Aluminum Company","recipient_organization":"Oracle Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:03+00:00","page":"https://rirtracker.com/ip/146.181.0.0-146.181.255.255/#e-bc079dcb6df37116","report_page":"https://rirtracker.com/arin/reports/2024-04-11/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/146.181.0.0-146.181.255.255.json","explanation":"ARIN's transfer log records a transfer from Century Aluminum Company (ARIN) to Oracle Corporation (ARIN) on 2024-04-11 17:48 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-April/005599.html","retrieved_at":"2026-10-12T18:42:33+00:00","summary":"ARIN-Issued report for 2024-04-11: \"Add 146.181.0.0-146.181.255.255\""},{"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 2024-04-11 17:48 UTC, Century Aluminum Company (ARIN) to Oracle Corporation (ARIN); resources moved: 146.181.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240410.gz","retrieved_at":"2026-10-12T23:38:13+00:00","summary":"ARIN delegated statistics 2024-04-10 (produced 2024-04-10T13:00:48+00:00), before the report: allocated (dated 1991-02-26)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240412.gz","retrieved_at":"2026-10-12T23:38:18+00:00","summary":"ARIN delegated statistics 2024-04-12 (produced 2024-04-12T13:00:47+00:00), after the report: allocated (dated 2024-04-11)"}]},{"event_id":"5e1f1a8802ce9a4b","registry":"ARIN","report_date":"2024-03-18","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"146.181.0.0/16","start":"146.181.0.0","end":"146.181.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Alumax of South Carolina","recipient_organization":"Century Aluminum Company","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:14+00:00","page":"https://rirtracker.com/ip/146.181.0.0-146.181.255.255/#e-5e1f1a8802ce9a4b","report_page":"https://rirtracker.com/arin/reports/2024-03-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/146.181.0.0-146.181.255.255.json","observed":"Merger/acquisition: Alumax of South Carolina (ARIN) to Century Aluminum Company (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Alumax of South Carolina (ARIN) to Century Aluminum Company (ARIN) on 2024-03-18 12:58 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 2024-03-18 12:58 UTC, Alumax of South Carolina (ARIN) to Century Aluminum Company (ARIN); resources moved: 146.181.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240317.gz","retrieved_at":"2026-10-12T23:36:54+00:00","summary":"ARIN delegated statistics 2024-03-17 (produced 2024-03-17T13:00:45+00:00), before the report: allocated (dated 1991-02-26)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240319.gz","retrieved_at":"2026-10-12T23:36:59+00:00","summary":"ARIN delegated statistics 2024-03-19 (produced 2024-03-19T13:00:47+00:00), after the report: allocated (dated 1991-02-26)"}]}],"classification_history":{"bc079dcb6df37116":[{"raw_change_id":186748,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:01:56+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Century Aluminum Company (ARIN) to Oracle Corporation (ARIN) on 2024-04-11 17:48 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186748,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:42+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Century Aluminum Company (ARIN) to Oracle Corporation (ARIN) on 2024-04-11 17:48 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186748,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:33+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Century Aluminum Company (ARIN) to Oracle Corporation (ARIN) on 2024-04-11 17:48 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186748,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:03+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Century Aluminum Company (ARIN) to Oracle Corporation (ARIN) on 2024-04-11 17:48 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"5e1f1a8802ce9a4b":[{"raw_change_id":570547,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:14+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Alumax of South Carolina (ARIN) to Century Aluminum Company (ARIN) on 2024-03-18 12:58 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 2024-04-11)"}}