{"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":"208.66.164.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/208.66.164.0-208.66.167.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2006-04-20)"},"current_holder":{"rir":"ARIN","org":"Laboratory Corporation of America","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":35960,"date":"2024-06-25T14:50:29Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"COVANCE INC","recipient_org":"Laboratory Corporation of America","range":"208.66.164.0/22","log":"ARIN"}],"events":[{"event_id":"1a1ce3aed37283bf","registry":"ARIN","report_date":"2024-06-25","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"208.66.164.0/22","start":"208.66.164.0","end":"208.66.167.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"COVANCE INC","recipient_organization":"Laboratory Corporation of America","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:15+00:00","page":"https://rirtracker.com/ip/208.66.164.0-208.66.167.255/#e-1a1ce3aed37283bf","report_page":"https://rirtracker.com/arin/reports/2024-06-25/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/208.66.164.0-208.66.167.255.json","observed":"Merger/acquisition: COVANCE INC (ARIN) to Laboratory Corporation of America (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from COVANCE INC (ARIN) to Laboratory Corporation of America (ARIN) on 2024-06-25 14:50 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 2024-06-25 14:50 UTC, COVANCE INC (ARIN) to Laboratory Corporation of America (ARIN); resources moved: 208.66.164.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240624.gz","retrieved_at":"2026-10-12T23:42:10+00:00","summary":"ARIN delegated statistics 2024-06-24 (produced 2024-06-24T13:00:44+00:00), before the report: allocated (dated 2006-04-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240626.gz","retrieved_at":"2026-10-12T23:42:15+00:00","summary":"ARIN delegated statistics 2024-06-26 (produced 2024-06-26T13:00:46+00:00), after the report: allocated (dated 2006-04-20)"}]},{"event_id":"ddbdcb72068e440f","registry":"ARIN","report_date":"2014-10-14","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"208.66.164.0/22","start":"208.66.164.0","end":"208.66.167.255","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":"2026-10-14T00:00:08+00:00","page":"https://rirtracker.com/ip/208.66.164.0-208.66.167.255/#e-ddbdcb72068e440f","report_page":"https://rirtracker.com/arin/reports/2014-10-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/208.66.164.0-208.66.167.255.json","observed":"208.66.164.0/22 assigned on 2014-10-14, reserved on 2014-10-15","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":"2014-12-13","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 2006-04-20) on 2014-10-13 and reserved on 2014-10-15. 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 2014-12-13. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141015.gz","retrieved_at":"2026-10-12T20:42:29+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 208.66.164.0/22 assigned on 2014-10-14, reserved on 2014-10-15"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141013.gz","retrieved_at":"2026-10-12T20:42:24+00:00","summary":"ARIN delegated statistics 2014-10-13 (produced 2014-10-13T05:03:47+00:00), before the report: assigned (dated 2006-04-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141015.gz","retrieved_at":"2026-10-12T20:42:29+00:00","summary":"ARIN delegated statistics 2014-10-15 (produced 2014-10-15T05:03:54+00:00), after the report: reserved"}]}],"classification_history":{"1a1ce3aed37283bf":[{"raw_change_id":571238,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:15+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from COVANCE INC (ARIN) to Laboratory Corporation of America (ARIN) on 2024-06-25 14:50 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."}],"ddbdcb72068e440f":[{"raw_change_id":290438,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:51:51+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 2006-04-20) on 2014-10-13 and reserved on 2014-10-15. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290438,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:55+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 2006-04-20) on 2014-10-13 and reserved on 2014-10-15. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290438,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:15+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 2006-04-20) on 2014-10-13 and reserved on 2014-10-15. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290438,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:08+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 2006-04-20) on 2014-10-13 and reserved on 2014-10-15. 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 2014-12-13. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2006-04-20)"}}