{"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":"157.185.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/157.185.0.0-157.185.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2016-04-25), allocated (dated 2023-04-13), allocated (dated 2026-04-03)"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":43828,"date":"2026-05-11T14:43:06Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Clearwave Communications","recipient_org":"Metro Communications Company","range":"157.185.64.0/18","log":"ARIN"},{"id":43366,"date":"2026-04-03T16:45:22Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Parsons Corporation","recipient_org":"Conterra","range":"157.185.0.0/18","log":"ARIN"},{"id":31251,"date":"2023-04-13T16:06:46Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"QUANTIL NETWORKS INC","recipient_org":"Meteverse Limited.","range":"157.185.128.0/18","log":"ARIN"},{"id":10658,"date":"2017-08-17T19:41:28Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"QUANTIL, INC","recipient_org":"QUANTIL NETWORKS INC","range":"157.185.128.0/18","log":"ARIN"},{"id":10633,"date":"2017-08-14T22:08:18Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"Parsons Corporation","recipient_org":"DataDock.INC","range":"157.185.192.0/18","log":"ARIN"},{"id":125495,"date":"2017-08-14T21:54:36Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"PCIP","recipient_org":"Japan Network Information Center/DataDock","range":"157.185.192.0/18","log":"APNIC"},{"id":7243,"date":"2016-06-28T15:53:27Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Parsons Corporation","recipient_org":"QUANTIL, INC","range":"157.185.128.0/18","log":"ARIN"},{"id":6828,"date":"2016-04-25T17:04:39Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Parsons Corporation","recipient_org":"Clearwave Communications","range":"157.185.64.0/18","log":"ARIN"},{"id":5814,"date":"2015-07-02T19:42:12Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sparta Inc. AESO","recipient_org":"Parsons Corporation","range":"157.185.0.0/16","log":"ARIN"}],"events":[{"event_id":"ff824cf68a524f44","registry":"ARIN","report_date":"2015-07-02","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"157.185.0.0/16","start":"157.185.0.0","end":"157.185.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sparta Inc. AESO","recipient_organization":"Parsons Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:23+00:00","page":"https://rirtracker.com/ip/157.185.0.0-157.185.255.255/#e-ff824cf68a524f44","report_page":"https://rirtracker.com/arin/reports/2015-07-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/157.185.0.0-157.185.255.255.json","observed":"Merger/acquisition: Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN) on 2015-07-02 19:42 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 2015-07-02 19:42 UTC, Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN); resources moved: 157.185.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150701.gz","retrieved_at":"2026-10-12T20:54:57+00:00","summary":"ARIN delegated statistics 2015-07-01 (produced 2015-07-01T05:05:05+00:00), before the report: assigned (dated 1992-01-22)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150703.gz","retrieved_at":"2026-10-12T20:55:02+00:00","summary":"ARIN delegated statistics 2015-07-03 (produced 2015-07-03T05:05:15+00:00), after the report: assigned (dated 1992-01-22)"}]}],"classification_history":{"ff824cf68a524f44":[{"raw_change_id":549375,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:23+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sparta Inc. AESO (ARIN) to Parsons Corporation (ARIN) on 2015-07-02 19:42 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 2016-04-25), allocated (dated 2023-04-13), allocated (dated 2026-04-03)"}}