{"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":"104.166.16.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/104.166.16.0-104.166.31.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2014-08-18)"},"current_holder":{"rir":"ARIN","org":"Altera Digital Health, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":39944,"date":"2025-04-07T11:34:07Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Allscripts Healthcare, LLC","recipient_org":"Altera Digital Health, Inc.","range":"104.166.16.0/20","log":"ARIN"}],"events":[{"event_id":"375dc1c75a42842d","registry":"ARIN","report_date":"2025-04-07","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"104.166.16.0/20","start":"104.166.16.0","end":"104.166.31.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Allscripts Healthcare, LLC","recipient_organization":"Altera Digital Health, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:21+00:00","page":"https://rirtracker.com/ip/104.166.16.0-104.166.31.255/#e-375dc1c75a42842d","report_page":"https://rirtracker.com/arin/reports/2025-04-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/104.166.16.0-104.166.31.255.json","observed":"Merger/acquisition: Allscripts Healthcare, LLC (ARIN) to Altera Digital Health, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Allscripts Healthcare, LLC (ARIN) to Altera Digital Health, Inc. (ARIN) on 2025-04-07 11:34 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 2025-04-07 11:34 UTC, Allscripts Healthcare, LLC (ARIN) to Altera Digital Health, Inc. (ARIN); resources moved: 104.166.16.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250406.gz","retrieved_at":"2026-10-12T23:57:43+00:00","summary":"ARIN delegated statistics 2025-04-06 (produced 2025-04-06T13:01:09+00:00), before the report: allocated (dated 2014-08-18)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250408.gz","retrieved_at":"2026-10-12T23:57:48+00:00","summary":"ARIN delegated statistics 2025-04-08 (produced 2025-04-08T13:01:09+00:00), after the report: allocated (dated 2014-08-18)"}]},{"event_id":"dcab275f96273eb1","registry":"ARIN","report_date":"2014-08-18","source":"arin_issued","raw_action":"ADD","raw_line":"Add 104.166.16.0-104.166.31.255","resource_type":"ipv4","resource":"104.166.16.0/20","start":"104.166.16.0","end":"104.166.31.255","classification":"APPARENT_NEW_ISSUANCE","classification_label":"Apparent new issuance","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":"2026-10-13T23:51:14+00:00","page":"https://rirtracker.com/ip/104.166.16.0-104.166.31.255/#e-dcab275f96273eb1","report_page":"https://rirtracker.com/arin/reports/2014-08-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/104.166.16.0-104.166.31.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2014-August/002077.html","retrieved_at":"2026-10-12T18:38:28+00:00","summary":"ARIN-Issued report for 2014-08-18: \"Add 104.166.16.0-104.166.31.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140817.gz","retrieved_at":"2026-10-12T20:39:38+00:00","summary":"ARIN delegated statistics 2014-08-17 (produced 2014-08-17T05:05:04+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140819.gz","retrieved_at":"2026-10-12T20:39:43+00:00","summary":"ARIN delegated statistics 2014-08-19 (produced 2014-08-19T05:04:50+00:00), after the report: assigned (dated 2014-08-18)"}]},{"event_id":"f6fe70c164723b35","registry":"ARIN","report_date":"2014-08-18","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 104.166.16.0-104.166.31.255","resource_type":"ipv4","resource":"104.166.16.0/20","start":"104.166.16.0","end":"104.166.31.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:14+00:00","page":"https://rirtracker.com/ip/104.166.16.0-104.166.31.255/#e-f6fe70c164723b35","report_page":"https://rirtracker.com/arin/reports/2014-08-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/104.166.16.0-104.166.31.255.json","explanation":"ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.166.16.0-104.166.31.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2014-August/002077.html","retrieved_at":"2026-10-12T18:38:28+00:00","summary":"ARIN-Issued report for 2014-08-18: \"Remove 104.166.16.0-104.166.31.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140817.gz","retrieved_at":"2026-10-12T20:39:38+00:00","summary":"ARIN delegated statistics 2014-08-17 (produced 2014-08-17T05:05:04+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140819.gz","retrieved_at":"2026-10-12T20:39:43+00:00","summary":"ARIN delegated statistics 2014-08-19 (produced 2014-08-19T05:04:50+00:00), after the report: assigned (dated 2014-08-18)"}]}],"classification_history":{"375dc1c75a42842d":[{"raw_change_id":573312,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:21+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Allscripts Healthcare, LLC (ARIN) to Altera Digital Health, Inc. (ARIN) on 2025-04-07 11:34 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."}],"dcab275f96273eb1":[{"raw_change_id":133484,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:26:12+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. The tracker saw this range released from hold on 2011-06-06 (69.57.208.0-216.250.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":133484,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:35+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. The tracker saw this range released from hold on 2011-06-06 (69.57.208.0-216.250.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":133484,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:11+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":133484,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:14+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}],"f6fe70c164723b35":[{"raw_change_id":133478,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:26:12+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.166.16.0-104.166.31.255. The issuance is explained on that line."},{"raw_change_id":133478,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:35+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.166.16.0-104.166.31.255. The issuance is explained on that line."},{"raw_change_id":133478,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:11+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.166.16.0-104.166.31.255. The issuance is explained on that line."},{"raw_change_id":133478,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:14+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2014-08-17 and assigned (dated 2014-08-18) on 2014-08-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 104.166.16.0-104.166.31.255. The issuance is explained on that line."}]},"arin_statistics_now":{"status":"allocated (dated 2014-08-18)"}}