{"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":"66.55.160.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.55.160.0-66.55.191.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2010-03-29)"},"current_holder":{"rir":"ARIN","org":"Windstream Communications LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":14821,"date":"2018-09-18T17:08:49Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Earthlink, Inc.","recipient_org":"Windstream Communications LLC","range":"66.55.160.0/19","log":"ARIN"}],"events":[{"event_id":"bd9a866e9e19ad77","registry":"ARIN","report_date":"2018-09-18","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"66.55.160.0/19","start":"66.55.160.0","end":"66.55.191.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Earthlink, Inc.","recipient_organization":"Windstream Communications LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:39+00:00","page":"https://rirtracker.com/ip/66.55.160.0-66.55.191.255/#e-bd9a866e9e19ad77","report_page":"https://rirtracker.com/arin/reports/2018-09-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.55.160.0-66.55.191.255.json","observed":"Merger/acquisition: Earthlink, Inc. (ARIN) to Windstream Communications LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Earthlink, Inc. (ARIN) to Windstream Communications LLC (ARIN) on 2018-09-18 17:08 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 2018-09-18 17:08 UTC, Earthlink, Inc. (ARIN) to Windstream Communications LLC (ARIN); resources moved: 66.55.160.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180917.gz","retrieved_at":"2026-10-12T21:52:42+00:00","summary":"ARIN delegated statistics 2018-09-17 (produced 2018-09-17T05:00:16+00:00), before the report: allocated (dated 2010-03-29)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180919.gz","retrieved_at":"2026-10-12T21:52:47+00:00","summary":"ARIN delegated statistics 2018-09-19 (produced 2018-09-19T05:00:17+00:00), after the report: allocated (dated 2010-03-29)"}]},{"event_id":"d9742ba53199d3d7","registry":"ARIN","report_date":"2010-03-22","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 66.55.160.0-66.55.191.255","resource_type":"ipv4","resource":"66.55.160.0/19","start":"66.55.160.0","end":"66.55.191.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:48+00:00","page":"https://rirtracker.com/ip/66.55.160.0-66.55.191.255/#e-d9742ba53199d3d7","report_page":"https://rirtracker.com/arin/reports/2010-03-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.55.160.0-66.55.191.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-03-21 and not issued on 2010-03-23. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-March/000461.html","retrieved_at":"2026-10-12T18:36:36+00:00","summary":"ARIN-Issued report for 2010-03-22: \"Remove 66.55.160.0-66.55.191.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100321.gz","retrieved_at":"2026-10-12T19:02:53+00:00","summary":"ARIN delegated statistics 2010-03-21, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100323.gz","retrieved_at":"2026-10-12T19:02:57+00:00","summary":"ARIN delegated statistics 2010-03-23, after the report: not issued"}]}],"classification_history":{"bd9a866e9e19ad77":[{"raw_change_id":556041,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:39+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Earthlink, Inc. (ARIN) to Windstream Communications LLC (ARIN) on 2018-09-18 17:08 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."}],"d9742ba53199d3d7":[{"raw_change_id":121053,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:11:57+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-03-21 and not issued on 2010-03-23. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121053,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:16+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-03-21 and not issued on 2010-03-23. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121053,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:49+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-03-21 and not issued on 2010-03-23. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121053,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:48+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-03-21 and not issued on 2010-03-23. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."}]},"arin_statistics_now":{"status":"allocated (dated 2010-03-29)"}}