{"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":"216.231.224.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/216.231.224.0-216.231.239.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1999-06-10)"},"current_holder":{"rir":"ARIN","org":"CDK Global, LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":25266,"date":"2021-07-30T20:33:35Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"The Cobalt Group, Inc","recipient_org":"CDK Global, LLC","range":"216.231.224.0/20","log":"ARIN"}],"events":[{"event_id":"d1c11414ef64db64","registry":"ARIN","report_date":"2021-07-30","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"216.231.224.0/20","start":"216.231.224.0","end":"216.231.239.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"The Cobalt Group, Inc","recipient_organization":"CDK Global, LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:57+00:00","page":"https://rirtracker.com/ip/216.231.224.0-216.231.239.255/#e-d1c11414ef64db64","report_page":"https://rirtracker.com/arin/reports/2021-07-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.231.224.0-216.231.239.255.json","observed":"Merger/acquisition: The Cobalt Group, Inc (ARIN) to CDK Global, LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from The Cobalt Group, Inc (ARIN) to CDK Global, LLC (ARIN) on 2021-07-30 20:33 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 2021-07-30 20:33 UTC, The Cobalt Group, Inc (ARIN) to CDK Global, LLC (ARIN); resources moved: 216.231.224.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210729.gz","retrieved_at":"2026-10-12T22:46:25+00:00","summary":"ARIN delegated statistics 2021-07-29 (produced 2021-07-29T14:00:13+00:00), before the report: assigned (dated 1999-06-10)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210731.gz","retrieved_at":"2026-10-12T22:46:38+00:00","summary":"ARIN delegated statistics 2021-07-31 (produced 2021-07-31T14:00:13+00:00), after the report: allocated (dated 1999-06-10)"}]},{"event_id":"d7f66c2f35404caa","registry":"ARIN","report_date":"2013-08-13","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"216.231.224.0/20","start":"216.231.224.0","end":"216.231.239.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:23+00:00","page":"https://rirtracker.com/ip/216.231.224.0-216.231.239.255/#e-d7f66c2f35404caa","report_page":"https://rirtracker.com/arin/reports/2013-08-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.231.224.0-216.231.239.255.json","observed":"216.231.224.0/20 assigned on 2013-08-13, reserved on 2013-08-14","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_days":60,"estimated_hold_end":"2013-10-12","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1999-06-10) on 2013-08-12 and reserved on 2013-08-14. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2013-10-12. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130814.gz","retrieved_at":"2026-10-12T20:03:11+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 216.231.224.0/20 assigned on 2013-08-13, reserved on 2013-08-14"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130812.gz","retrieved_at":"2026-10-12T20:03:06+00:00","summary":"ARIN delegated statistics 2013-08-12 (produced 2013-08-12T05:03:02+00:00), before the report: assigned (dated 1999-06-10)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130814.gz","retrieved_at":"2026-10-12T20:03:11+00:00","summary":"ARIN delegated statistics 2013-08-14 (produced 2013-08-14T05:05:31+00:00), after the report: reserved"}]}],"classification_history":{"d1c11414ef64db64":[{"raw_change_id":563694,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:57+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from The Cobalt Group, Inc (ARIN) to CDK Global, LLC (ARIN) on 2021-07-30 20:33 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."}],"d7f66c2f35404caa":[{"raw_change_id":262291,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:37:07+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1999-06-10) on 2013-08-12 and reserved on 2013-08-14. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2013-10-12. This does not confirm availability."},{"raw_change_id":262291,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:24+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1999-06-10) on 2013-08-12 and reserved on 2013-08-14. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2013-10-12. This does not confirm availability."},{"raw_change_id":262291,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:36+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1999-06-10) on 2013-08-12 and reserved on 2013-08-14. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2013-10-12. This does not confirm availability."},{"raw_change_id":262291,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:23+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it assigned (dated 1999-06-10) on 2013-08-12 and reserved on 2013-08-14. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2013-10-12. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 1999-06-10)"}}