{"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":"204.153.156.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/204.153.156.0-204.153.159.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1994-12-15)"},"current_holder":{"rir":"ARIN","org":"Lockheed Martin Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":13601,"date":"2018-07-10T19:45:23Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Lockheed Missiles and Space Company","recipient_org":"Lockheed Martin Corporation","range":"204.153.156.0/22","log":"ARIN"}],"events":[{"event_id":"f0571820cd2133d6","registry":"ARIN","report_date":"2018-07-10","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"204.153.156.0/22","start":"204.153.156.0","end":"204.153.159.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Lockheed Missiles and Space Company","recipient_organization":"Lockheed Martin Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:36+00:00","page":"https://rirtracker.com/ip/204.153.156.0-204.153.159.255/#e-f0571820cd2133d6","report_page":"https://rirtracker.com/arin/reports/2018-07-10/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/204.153.156.0-204.153.159.255.json","observed":"Merger/acquisition: Lockheed Missiles and Space Company (ARIN) to Lockheed Martin Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Lockheed Missiles and Space Company (ARIN) to Lockheed Martin Corporation (ARIN) on 2018-07-10 19:45 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 2018-07-10 19:45 UTC, Lockheed Missiles and Space Company (ARIN) to Lockheed Martin Corporation (ARIN); resources moved: 204.153.156.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180709.gz","retrieved_at":"2026-10-12T21:49:03+00:00","summary":"ARIN delegated statistics 2018-07-09 (produced 2018-07-09T05:00:24+00:00), before the report: allocated (dated 1994-12-15)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180711.gz","retrieved_at":"2026-10-12T21:49:08+00:00","summary":"ARIN delegated statistics 2018-07-11 (produced 2018-07-11T05:00:24+00:00), after the report: allocated (dated 1994-12-15)"}]}],"classification_history":{"f0571820cd2133d6":[{"raw_change_id":554923,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:36+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Lockheed Missiles and Space Company (ARIN) to Lockheed Martin Corporation (ARIN) on 2018-07-10 19:45 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 1994-12-15)"}}