{"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":"72.21.0.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/72.21.0.0-72.21.31.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2004-12-03), allocated (dated 2019-01-31), allocated (dated 2019-04-11), allocated (dated 2019-04-19), allocated (dated 2019-07-08), allocated (dated 2021-03-15), allocated (dated 2021-04-22)"},"current_holder":{"rir":"ARIN","org":"Colo Solutions Group, LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":28986,"date":"2022-08-29T21:51:01Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Colo Solutions","range":"72.21.8.0/23","log":"ARIN"},{"id":28987,"date":"2022-08-29T21:51:01Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Colo Solutions","range":"72.21.12.0/22","log":"ARIN"},{"id":28988,"date":"2022-08-29T21:51:01Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Colo Solutions","range":"72.21.20.0/24","log":"ARIN"},{"id":28989,"date":"2022-08-29T21:51:01Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Colo Solutions","range":"72.21.22.0/24","log":"ARIN"},{"id":24475,"date":"2021-04-22T20:56:31Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Wholesail networks LLC","range":"72.21.10.0/23","log":"ARIN"},{"id":24080,"date":"2021-03-15T21:28:30Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Dixie EPA","range":"72.21.0.0/21","log":"ARIN"},{"id":18407,"date":"2019-07-08T15:54:35Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Whatbox Inc.","range":"72.21.16.0/22","log":"ARIN"},{"id":17462,"date":"2019-04-19T12:36:29Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"IO INC","range":"72.21.24.0/21","log":"ARIN"},{"id":17352,"date":"2019-04-11T14:33:11Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"Bespoke Software, Inc.","range":"72.21.21.0/24","log":"ARIN"},{"id":16896,"date":"2019-01-31T17:10:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions Group, LLC","recipient_org":"AutoCrib, Inc.","range":"72.21.23.0/24","log":"ARIN"},{"id":14027,"date":"2018-07-30T18:16:38Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Colo Solutions, Inc.","recipient_org":"Colo Solutions Group, LLC","range":"72.21.0.0/19","log":"ARIN"}],"events":[{"event_id":"efe8a5b6c9a55cca","registry":"ARIN","report_date":"2018-07-30","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"72.21.0.0/19","start":"72.21.0.0","end":"72.21.31.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Colo Solutions, Inc.","recipient_organization":"Colo Solutions Group, LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:37+00:00","page":"https://rirtracker.com/ip/72.21.0.0-72.21.31.255/#e-efe8a5b6c9a55cca","report_page":"https://rirtracker.com/arin/reports/2018-07-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.21.0.0-72.21.31.255.json","observed":"Merger/acquisition: Colo Solutions, Inc. (ARIN) to Colo Solutions Group, LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Colo Solutions, Inc. (ARIN) to Colo Solutions Group, LLC (ARIN) on 2018-07-30 18:16 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 2018-07-30 18:16 UTC, Colo Solutions, Inc. (ARIN) to Colo Solutions Group, LLC (ARIN); resources moved: 72.21.0.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180729.gz","retrieved_at":"2026-10-12T21:50:05+00:00","summary":"ARIN delegated statistics 2018-07-29 (produced 2018-07-29T05:00:20+00:00), before the report: allocated (dated 2004-12-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180731.gz","retrieved_at":"2026-10-12T21:50:10+00:00","summary":"ARIN delegated statistics 2018-07-31 (produced 2018-07-31T05:00:22+00:00), after the report: allocated (dated 2004-12-03)"}]}],"classification_history":{"efe8a5b6c9a55cca":[{"raw_change_id":555309,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:37+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Colo Solutions, Inc. (ARIN) to Colo Solutions Group, LLC (ARIN) on 2018-07-30 18:16 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 2004-12-03), allocated (dated 2019-01-31), allocated (dated 2019-04-11), allocated (dated 2019-04-19), allocated (dated 2019-07-08), allocated (dated 2021-03-15), allocated (dated 2021-04-22)"}}