{"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":"AS14617","resource_type":"asn","page":"https://rirtracker.com/asn/14617/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2017-08-17)"},"current_holder":{"rir":"ARIN","org":"Concentra Health Services, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":5090,"date":"2026-05-29T12:25:51Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Select Medical Corporation","recipient_org":"Concentra Health Services, Inc.","range":"AS14617","log":"ARIN"}],"events":[{"event_id":"a4a8d76ad2139ef4","registry":"ARIN","report_date":"2026-05-29","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS14617","start":14617,"end":14617,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Select Medical Corporation","recipient_organization":"Concentra Health Services, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:28+00:00","page":"https://rirtracker.com/asn/14617/#e-a4a8d76ad2139ef4","report_page":"https://rirtracker.com/arin/reports/2026-05-29/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/14617.json","observed":"Merger/acquisition: Select Medical Corporation (ARIN) to Concentra Health Services, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Select Medical Corporation (ARIN) to Concentra Health Services, Inc. (ARIN) on 2026-05-29 12:25 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 2026-05-29 12:25 UTC, Select Medical Corporation (ARIN) to Concentra Health Services, Inc. (ARIN); resources moved: AS14617"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260528","retrieved_at":"2026-10-09T19:01:57+00:00","summary":"ARIN delegated statistics 2026-05-28 (produced 2026-05-28T13:00:21+00:00), before the report: assigned (dated 2017-08-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260530","retrieved_at":"2026-10-09T19:02:03+00:00","summary":"ARIN delegated statistics 2026-05-30 (produced 2026-05-30T13:00:19+00:00), after the report: assigned (dated 2017-08-17)"}]},{"event_id":"1df12a3ee4702936","registry":"ARIN","report_date":"2017-08-17","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS14617","resource_type":"asn","resource":"AS14617","start":14617,"end":14617,"classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:55+00:00","page":"https://rirtracker.com/asn/14617/#e-1df12a3ee4702936","report_page":"https://rirtracker.com/arin/reports/2017-08-17/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/14617.json","explanation":"No transfer record matches. ARIN's statistics show it available on 2017-08-16 and assigned (dated 2017-08-17) on 2017-08-18. The tracker saw this range released from hold on 2017-07-31 (AS14617), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2017-August/003172.html","retrieved_at":"2026-10-12T18:39:44+00:00","summary":"ARIN-Issued report for 2017-08-17: \"Add AS14617\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170816.gz","retrieved_at":"2026-10-12T21:32:49+00:00","summary":"ARIN delegated statistics 2017-08-16 (produced 2017-08-16T05:10:35+00:00), before the report: available"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170818.gz","retrieved_at":"2026-10-12T21:33:01+00:00","summary":"ARIN delegated statistics 2017-08-18 (produced 2017-08-18T05:11:22+00:00), after the report: assigned (dated 2017-08-17)"}]},{"event_id":"c1b3f1974de33ffa","registry":"ARIN","report_date":"2017-07-31","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS14617","resource_type":"asn","resource":"AS14617","start":14617,"end":14617,"classification":"HOLD_RELEASED","classification_label":"Released from hold (ARIN lists it as 'available')","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"ARIN's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:52+00:00","page":"https://rirtracker.com/asn/14617/#e-c1b3f1974de33ffa","report_page":"https://rirtracker.com/arin/reports/2017-07-31/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/14617.json","explanation":"ARIN's statistics show it reserved on 2017-07-30 and available on 2017-08-01. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2016-04-05, 482 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2017-July/003155.html","retrieved_at":"2026-10-12T18:39:42+00:00","summary":"ARIN-Issued report for 2017-07-31: \"Remove AS14617\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170730.gz","retrieved_at":"2026-10-12T21:31:58+00:00","summary":"ARIN delegated statistics 2017-07-30 (produced 2017-07-30T05:09:01+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170801.gz","retrieved_at":"2026-10-12T21:32:03+00:00","summary":"ARIN delegated statistics 2017-08-01 (produced 2017-08-01T05:09:27+00:00), after the report: available"}]},{"event_id":"234d9920d9dc2ba0","registry":"ARIN","report_date":"2016-04-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS14617","start":14617,"end":14617,"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":"2026-10-14T00:01:53+00:00","page":"https://rirtracker.com/asn/14617/#e-234d9920d9dc2ba0","report_page":"https://rirtracker.com/arin/reports/2016-04-05/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/14617.json","observed":"AS14617 assigned on 2016-04-05, reserved on 2016-04-06","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_months":6,"estimated_hold_end":"2016-10-05","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 2005-11-03) on 2016-04-04 and reserved on 2016-04-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2016-10-05. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160406.gz","retrieved_at":"2026-10-12T21:08:33+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS14617 assigned on 2016-04-05, reserved on 2016-04-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160404.gz","retrieved_at":"2026-10-12T21:08:28+00:00","summary":"ARIN delegated statistics 2016-04-04 (produced 2016-04-04T05:05:34+00:00), before the report: assigned (dated 2005-11-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160406.gz","retrieved_at":"2026-10-12T21:08:33+00:00","summary":"ARIN delegated statistics 2016-04-06 (produced 2016-04-06T05:05:29+00:00), after the report: reserved"}]}],"classification_history":{"a4a8d76ad2139ef4":[{"raw_change_id":576192,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:28+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Select Medical Corporation (ARIN) to Concentra Health Services, Inc. (ARIN) on 2026-05-29 12:25 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."}],"1df12a3ee4702936":[{"raw_change_id":150988,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:39:00+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2017-08-16 and assigned (dated 2017-08-17) on 2017-08-18. The tracker saw this range released from hold on 2017-07-31 (AS14617), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":150988,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:07+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2017-08-16 and assigned (dated 2017-08-17) on 2017-08-18. The tracker saw this range released from hold on 2017-07-31 (AS14617), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":150988,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:47+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2017-08-16 and assigned (dated 2017-08-17) on 2017-08-18. The tracker saw this range released from hold on 2017-07-31 (AS14617), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":150988,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:55+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it available on 2017-08-16 and assigned (dated 2017-08-17) on 2017-08-18. The tracker saw this range released from hold on 2017-07-31 (AS14617), so it appears to have been issued again from ARIN's pool."}],"c1b3f1974de33ffa":[{"raw_change_id":150396,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:38:51+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-07-30 and available on 2017-08-01. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2016-04-05, 482 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":150396,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:04+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-07-30 and available on 2017-08-01. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2016-04-05, 482 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":150396,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:44+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2017-07-30 and available on 2017-08-01. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2016-04-05, 482 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":150396,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:52+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2017-07-30 and available on 2017-08-01. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2016-04-05, 482 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."}],"234d9920d9dc2ba0":[{"raw_change_id":316511,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:03:14+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 2005-11-03) on 2016-04-04 and reserved on 2016-04-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2016-10-05. This does not confirm availability."},{"raw_change_id":316511,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:25+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 2005-11-03) on 2016-04-04 and reserved on 2016-04-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2016-10-05. This does not confirm availability."},{"raw_change_id":316511,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:57:52+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 2005-11-03) on 2016-04-04 and reserved on 2016-04-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2016-10-05. This does not confirm availability."},{"raw_change_id":316511,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:01:53+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 2005-11-03) on 2016-04-04 and reserved on 2016-04-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2016-10-05. This does not confirm availability."}]},"arin_statistics_now":{"status":"assigned (dated 2017-08-17)"}}