{"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":"66.205.252.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.205.252.0-66.205.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-08-30)"},"current_holder":{"rir":"ARIN","org":"Vianet Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":45594,"date":"2026-09-15T20:46:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Netspectrum Wireless Internet Solutions","recipient_org":"Vianet Inc.","range":"66.205.252.0/22","log":"ARIN"}],"events":[{"event_id":"03e9c07f2aa958d8","registry":"ARIN","report_date":"2026-09-15","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"66.205.252.0/22","start":"66.205.252.0","end":"66.205.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Netspectrum Wireless Internet Solutions","recipient_organization":"Vianet Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:30+00:00","page":"https://rirtracker.com/ip/66.205.252.0-66.205.255.255/#e-03e9c07f2aa958d8","report_page":"https://rirtracker.com/arin/reports/2026-09-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.205.252.0-66.205.255.255.json","observed":"Merger/acquisition: Netspectrum Wireless Internet Solutions (ARIN) to Vianet Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Netspectrum Wireless Internet Solutions (ARIN) to Vianet Inc. (ARIN) on 2026-09-15 20:46 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 2026-09-15 20:46 UTC, Netspectrum Wireless Internet Solutions (ARIN) to Vianet Inc. (ARIN); resources moved: 66.205.252.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260914","retrieved_at":"2026-10-09T19:07:37+00:00","summary":"ARIN delegated statistics 2026-09-14 (produced 2026-09-14T13:00:20+00:00), before the report: allocated (dated 2019-08-30)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260916","retrieved_at":"2026-10-09T19:07:44+00:00","summary":"ARIN delegated statistics 2026-09-16 (produced 2026-09-16T13:00:21+00:00), after the report: allocated (dated 2019-08-30)"}]},{"event_id":"75490a31a069ee7b","registry":"ARIN","report_date":"2019-08-30","source":"arin_issued","raw_action":"ADD","raw_line":"Add 66.205.252.0-66.205.255.255","resource_type":"ipv4","resource":"66.205.252.0/22","start":"66.205.252.0","end":"66.205.255.255","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":"2026-10-13T23:52:35+00:00","page":"https://rirtracker.com/ip/66.205.252.0-66.205.255.255/#e-75490a31a069ee7b","report_page":"https://rirtracker.com/arin/reports/2019-08-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.205.252.0-66.205.255.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (66.205.224.0/19), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2019-August/003914.html","retrieved_at":"2026-10-12T18:40:35+00:00","summary":"ARIN-Issued report for 2019-08-30: \"Add 66.205.252.0-66.205.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190829.gz","retrieved_at":"2026-10-12T22:10:17+00:00","summary":"ARIN delegated statistics 2019-08-29 (produced 2019-08-29T14:00:16+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190831.gz","retrieved_at":"2026-10-12T22:10:30+00:00","summary":"ARIN delegated statistics 2019-08-31 (produced 2019-08-31T14:00:17+00:00), after the report: allocated (dated 2019-08-30)"}]}],"classification_history":{"03e9c07f2aa958d8":[{"raw_change_id":577299,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:30+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Netspectrum Wireless Internet Solutions (ARIN) to Vianet Inc. (ARIN) on 2026-09-15 20:46 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."}],"75490a31a069ee7b":[{"raw_change_id":161309,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:45:31+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (66.205.224.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161309,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:37+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (66.205.224.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161309,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:20+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (66.205.224.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161309,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:35+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (66.205.224.0/19), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2019-08-30)"}}