{"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":"66.171.224.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.171.224.0-66.171.239.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2011-02-01)"},"current_holder":{"rir":"ARIN","org":"GTT Americas, LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":40250,"date":"2025-05-07T14:08:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"GTT","recipient_org":"GTT Americas, LLC","range":"66.171.224.0/20","log":"ARIN"},{"id":10570,"date":"2017-07-26T16:45:23Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"nLayer Communications, Inc.","recipient_org":"GTT","range":"66.171.224.0/20","log":"ARIN"}],"events":[{"event_id":"001132149af6acbf","registry":"ARIN","report_date":"2025-05-07","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"66.171.224.0/20","start":"66.171.224.0","end":"66.171.239.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"GTT","recipient_organization":"GTT Americas, LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:21+00:00","page":"https://rirtracker.com/ip/66.171.224.0-66.171.239.255/#e-001132149af6acbf","report_page":"https://rirtracker.com/arin/reports/2025-05-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.171.224.0-66.171.239.255.json","observed":"Merger/acquisition: GTT (ARIN) to GTT Americas, LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from GTT (ARIN) to GTT Americas, LLC (ARIN) on 2025-05-07 14:08 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 2025-05-07 14:08 UTC, GTT (ARIN) to GTT Americas, LLC (ARIN); resources moved: 66.171.224.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250506.gz","retrieved_at":"2026-10-12T23:59:23+00:00","summary":"ARIN delegated statistics 2025-05-06 (produced 2025-05-06T13:01:10+00:00), before the report: allocated (dated 2011-02-01)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250508.gz","retrieved_at":"2026-10-12T23:59:28+00:00","summary":"ARIN delegated statistics 2025-05-08 (produced 2025-05-08T13:01:09+00:00), after the report: allocated (dated 2011-02-01)"}]},{"event_id":"76f24569db953e68","registry":"ARIN","report_date":"2017-07-26","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"66.171.224.0/20","start":"66.171.224.0","end":"66.171.239.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"nLayer Communications, Inc.","recipient_organization":"GTT","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:31+00:00","page":"https://rirtracker.com/ip/66.171.224.0-66.171.239.255/#e-76f24569db953e68","report_page":"https://rirtracker.com/arin/reports/2017-07-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.171.224.0-66.171.239.255.json","observed":"Merger/acquisition: nLayer Communications, Inc. (ARIN) to GTT (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from nLayer Communications, Inc. (ARIN) to GTT (ARIN) on 2017-07-26 16:45 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 2017-07-26 16:45 UTC, nLayer Communications, Inc. (ARIN) to GTT (ARIN); resources moved: 66.171.224.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170725.gz","retrieved_at":"2026-10-12T21:31:45+00:00","summary":"ARIN delegated statistics 2017-07-25 (produced 2017-07-25T05:09:00+00:00), before the report: allocated (dated 2011-02-01)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170727.gz","retrieved_at":"2026-10-12T21:31:50+00:00","summary":"ARIN delegated statistics 2017-07-27 (produced 2017-07-27T05:09:02+00:00), after the report: allocated (dated 2011-02-01)"}]},{"event_id":"34a9d3392db9f6e6","registry":"ARIN","report_date":"2011-02-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add 66.171.224.0-66.171.239.255","resource_type":"ipv4","resource":"66.171.224.0/20","start":"66.171.224.0","end":"66.171.239.255","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":"2026-10-13T23:50:51+00:00","page":"https://rirtracker.com/ip/66.171.224.0-66.171.239.255/#e-34a9d3392db9f6e6","report_page":"https://rirtracker.com/arin/reports/2011-02-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.171.224.0-66.171.239.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2011-01-31 and allocated (dated 2011-02-01) on 2011-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-01-20 (66.171.0.0-66.171.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2011-February/000778.html","retrieved_at":"2026-10-12T18:36:59+00:00","summary":"ARIN-Issued report for 2011-02-01: \"Add 66.171.224.0-66.171.239.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20110131.gz","retrieved_at":"2026-10-12T19:15:55+00:00","summary":"ARIN delegated statistics 2011-01-31, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20110202.gz","retrieved_at":"2026-10-12T19:15:59+00:00","summary":"ARIN delegated statistics 2011-02-02, after the report: allocated (dated 2011-02-01)"}]}],"classification_history":{"001132149af6acbf":[{"raw_change_id":573514,"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 GTT (ARIN) to GTT Americas, LLC (ARIN) on 2025-05-07 14:08 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."}],"76f24569db953e68":[{"raw_change_id":552835,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:31+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from nLayer Communications, Inc. (ARIN) to GTT (ARIN) on 2017-07-26 16:45 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."}],"34a9d3392db9f6e6":[{"raw_change_id":122617,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:13:17+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2011-01-31 and allocated (dated 2011-02-01) on 2011-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-01-20 (66.171.0.0-66.171.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":122617,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:18+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2011-01-31 and allocated (dated 2011-02-01) on 2011-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-01-20 (66.171.0.0-66.171.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":122617,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:52+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2011-01-31 and allocated (dated 2011-02-01) on 2011-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-01-20 (66.171.0.0-66.171.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":122617,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:51+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2011-01-31 and allocated (dated 2011-02-01) on 2011-02-02. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-01-20 (66.171.0.0-66.171.255.255), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2011-02-01)"}}