{"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":"72.21.128.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/72.21.128.0-72.21.159.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2024-03-26)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":35015,"date":"2024-03-26T14:51:55Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"Amazon.com, Inc.","range":"72.21.128.0/19","log":"ARIN"},{"id":31432,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.128.0/24","log":"ARIN"},{"id":31433,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.130.0/23","log":"ARIN"},{"id":31434,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.134.0/23","log":"ARIN"},{"id":31435,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.136.0/23","log":"ARIN"},{"id":31548,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.141.0/24","log":"ARIN"},{"id":31549,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.143.0/24","log":"ARIN"},{"id":31550,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.145.0/24","log":"ARIN"},{"id":31551,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.146.0/24","log":"ARIN"},{"id":31552,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.154.0/24","log":"ARIN"},{"id":31553,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.157.0/24","log":"ARIN"},{"id":31554,"date":"2023-04-18T14:15:50Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"EarthLink","recipient_org":"Windstream Communications LLC","range":"72.21.158.0/23","log":"ARIN"},{"id":23582,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.128.0/24","log":"ARIN"},{"id":23583,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.130.0/24","log":"ARIN"},{"id":23584,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.131.0/24","log":"ARIN"},{"id":23585,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.134.0/24","log":"ARIN"},{"id":23586,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.135.0/24","log":"ARIN"},{"id":23587,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.136.0/24","log":"ARIN"},{"id":23588,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.137.0/24","log":"ARIN"},{"id":23589,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.141.0/24","log":"ARIN"},{"id":23590,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.143.0/24","log":"ARIN"},{"id":23591,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.145.0/24","log":"ARIN"},{"id":23592,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.146.0/24","log":"ARIN"},{"id":23593,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.154.0/24","log":"ARIN"},{"id":23594,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.157.0/24","log":"ARIN"},{"id":23595,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.158.0/24","log":"ARIN"},{"id":23596,"date":"2021-02-12T22:04:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Windstream Communications LLC","recipient_org":"EarthLink","range":"72.21.159.0/24","log":"ARIN"},{"id":14882,"date":"2018-09-18T17:11:43Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Earthlink, Inc.","recipient_org":"Windstream Communications LLC","range":"72.21.128.0/19","log":"ARIN"}],"events":[{"event_id":"86f3b7334942dac0","registry":"ARIN","report_date":"2024-03-26","source":"arin_issued","raw_action":"ADD","raw_line":"Add 72.21.128.0-72.21.159.255","resource_type":"ipv4","resource":"72.21.128.0/19","start":"72.21.128.0","end":"72.21.159.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Windstream Communications LLC","recipient_organization":"Amazon.com, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:01+00:00","page":"https://rirtracker.com/ip/72.21.128.0-72.21.159.255/#e-86f3b7334942dac0","report_page":"https://rirtracker.com/arin/reports/2024-03-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.21.128.0-72.21.159.255.json","explanation":"ARIN's transfer log records a transfer from Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-26 14:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2024-March/005583.html","retrieved_at":"2026-10-12T18:42:31+00:00","summary":"ARIN-Issued report for 2024-03-26: \"Add 72.21.128.0-72.21.159.255\""},{"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: RESOURCE_TRANSFER on 2024-03-26 14:51 UTC, Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN); resources moved: 72.21.128.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240325.gz","retrieved_at":"2026-10-12T23:37:24+00:00","summary":"ARIN delegated statistics 2024-03-25 (produced 2024-03-25T13:00:47+00:00), before the report: allocated (dated 2009-01-27)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240327.gz","retrieved_at":"2026-10-12T23:37:29+00:00","summary":"ARIN delegated statistics 2024-03-27 (produced 2024-03-27T13:00:49+00:00), after the report: allocated (dated 2024-03-26)"}]},{"event_id":"175987e9c1358aec","registry":"ARIN","report_date":"2018-09-18","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"72.21.128.0/19","start":"72.21.128.0","end":"72.21.159.255","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/72.21.128.0-72.21.159.255/#e-175987e9c1358aec","report_page":"https://rirtracker.com/arin/reports/2018-09-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.21.128.0-72.21.159.255.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 17:11 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 17:11 UTC, Earthlink, Inc. (ARIN) to Windstream Communications LLC (ARIN); resources moved: 72.21.128.0/19"},{"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 2009-01-27)"},{"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 2009-01-27)"}]},{"event_id":"aa25f46d8efddccc","registry":"ARIN","report_date":"2009-01-27","source":"arin_issued","raw_action":"ADD","raw_line":"Add 72.21.128.0-72.21.159.255","resource_type":"ipv4","resource":"72.21.128.0/19","start":"72.21.128.0","end":"72.21.159.255","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":"2026-10-13T23:46:25+00:00","page":"https://rirtracker.com/ip/72.21.128.0-72.21.159.255/#e-aa25f46d8efddccc","report_page":"https://rirtracker.com/arin/reports/2009-01-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.21.128.0-72.21.159.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-01-26 and allocated (dated 2009-01-27) on 2009-01-28. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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/2009-January/000039.html","retrieved_at":"2026-10-12T18:35:38+00:00","summary":"ARIN-Issued report for 2009-01-27: \"Add 72.21.128.0-72.21.159.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090126.gz","retrieved_at":"2026-10-12T18:45:45+00:00","summary":"ARIN delegated statistics 2009-01-26, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090128.gz","retrieved_at":"2026-10-12T18:45:49+00:00","summary":"ARIN delegated statistics 2009-01-28, after the report: allocated (dated 2009-01-27)"}]}],"classification_history":{"86f3b7334942dac0":[{"raw_change_id":186207,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:01:22+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-26 14:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186207,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:41+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-26 14:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186207,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:32+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-26 14:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":186207,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:01+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Windstream Communications LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2024-03-26 14:51 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"175987e9c1358aec":[{"raw_change_id":556102,"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 17:11 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."}],"aa25f46d8efddccc":[{"raw_change_id":30277,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T02:33:12+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-01-26 and allocated (dated 2009-01-27) on 2009-01-28. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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":30277,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:01:43+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-01-26 and allocated (dated 2009-01-27) on 2009-01-28. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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":30277,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:43:52+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-01-26 and allocated (dated 2009-01-27) on 2009-01-28. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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":30277,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:25+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-01-26 and allocated (dated 2009-01-27) on 2009-01-28. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2024-03-26)"}}