{"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":"131.131.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/131.131.0.0-131.131.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1988-09-22)"},"current_holder":{"rir":"ARIN","org":"General Dynamics Information Technology, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":24517,"date":"2021-04-28T21:12:21Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"CSRA LLC","recipient_org":"General Dynamics Information Technology, Inc.","range":"131.131.0.0/16","log":"ARIN"},{"id":12014,"date":"2018-02-02T16:43:35Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Computer Sciences Corp - NTIS","recipient_org":"CSRA LLC","range":"131.131.0.0/16","log":"ARIN"}],"events":[{"event_id":"c3991a915057ba29","registry":"ARIN","report_date":"2021-04-28","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"131.131.0.0/16","start":"131.131.0.0","end":"131.131.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"CSRA LLC","recipient_organization":"General Dynamics Information Technology, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:56+00:00","page":"https://rirtracker.com/ip/131.131.0.0-131.131.255.255/#e-c3991a915057ba29","report_page":"https://rirtracker.com/arin/reports/2021-04-28/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.131.0.0-131.131.255.255.json","observed":"Merger/acquisition: CSRA LLC (ARIN) to General Dynamics Information Technology, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from CSRA LLC (ARIN) to General Dynamics Information Technology, Inc. (ARIN) on 2021-04-28 21:12 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 2021-04-28 21:12 UTC, CSRA LLC (ARIN) to General Dynamics Information Technology, Inc. (ARIN); resources moved: 131.131.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210427.gz","retrieved_at":"2026-10-12T22:41:53+00:00","summary":"ARIN delegated statistics 2021-04-27 (produced 2021-04-27T14:00:13+00:00), before the report: assigned (dated 1988-09-22)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210429.gz","retrieved_at":"2026-10-12T22:41:58+00:00","summary":"ARIN delegated statistics 2021-04-29 (produced 2021-04-29T14:00:13+00:00), after the report: assigned (dated 1988-09-22)"}]},{"event_id":"418b99d07185d590","registry":"ARIN","report_date":"2018-02-02","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"131.131.0.0/16","start":"131.131.0.0","end":"131.131.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Computer Sciences Corp - NTIS","recipient_organization":"CSRA LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:33+00:00","page":"https://rirtracker.com/ip/131.131.0.0-131.131.255.255/#e-418b99d07185d590","report_page":"https://rirtracker.com/arin/reports/2018-02-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.131.0.0-131.131.255.255.json","observed":"Merger/acquisition: Computer Sciences Corp - NTIS (ARIN) to CSRA LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Computer Sciences Corp - NTIS (ARIN) to CSRA LLC (ARIN) on 2018-02-02 16:43 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 2018-02-02 16:43 UTC, Computer Sciences Corp - NTIS (ARIN) to CSRA LLC (ARIN); resources moved: 131.131.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180201.gz","retrieved_at":"2026-10-12T21:41:09+00:00","summary":"ARIN delegated statistics 2018-02-01 (produced 2018-02-01T06:09:11+00:00), before the report: assigned (dated 1988-09-22)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180203.gz","retrieved_at":"2026-10-12T21:41:21+00:00","summary":"ARIN delegated statistics 2018-02-03 (produced 2018-02-03T06:08:55+00:00), after the report: assigned (dated 1988-09-22)"}]}],"classification_history":{"c3991a915057ba29":[{"raw_change_id":563230,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:56+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from CSRA LLC (ARIN) to General Dynamics Information Technology, Inc. (ARIN) on 2021-04-28 21:12 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."}],"418b99d07185d590":[{"raw_change_id":553670,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:33+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Computer Sciences Corp - NTIS (ARIN) to CSRA LLC (ARIN) on 2018-02-02 16:43 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 1988-09-22)"}}