{"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":"158.51.52.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/158.51.52.0-158.51.55.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-01-03)"},"current_holder":{"rir":"ARIN","org":"FlexNetworks","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":32779,"date":"2023-08-22T22:47:04Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Redbird Communications Inc","recipient_org":"FlexNetworks","range":"158.51.52.0/22","log":"ARIN"}],"events":[{"event_id":"47e0dcae4217c93d","registry":"ARIN","report_date":"2023-08-22","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"158.51.52.0/22","start":"158.51.52.0","end":"158.51.55.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Redbird Communications Inc","recipient_organization":"FlexNetworks","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:10+00:00","page":"https://rirtracker.com/ip/158.51.52.0-158.51.55.255/#e-47e0dcae4217c93d","report_page":"https://rirtracker.com/arin/reports/2023-08-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.52.0-158.51.55.255.json","observed":"Merger/acquisition: Redbird Communications Inc (ARIN) to FlexNetworks (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Redbird Communications Inc (ARIN) to FlexNetworks (ARIN) on 2023-08-22 22:47 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 2023-08-22 22:47 UTC, Redbird Communications Inc (ARIN) to FlexNetworks (ARIN); resources moved: 158.51.52.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230821.gz","retrieved_at":"2026-10-12T23:25:45+00:00","summary":"ARIN delegated statistics 2023-08-21 (produced 2023-08-21T13:00:12+00:00), before the report: allocated (dated 2020-01-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230823.gz","retrieved_at":"2026-10-12T23:25:50+00:00","summary":"ARIN delegated statistics 2023-08-23 (produced 2023-08-23T13:00:12+00:00), after the report: allocated (dated 2020-01-03)"}]},{"event_id":"c90f672db10eaae0","registry":"ARIN","report_date":"2020-01-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 158.51.52.0-158.51.55.255","resource_type":"ipv4","resource":"158.51.52.0/22","start":"158.51.52.0","end":"158.51.55.255","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":"2026-10-13T23:52:41+00:00","page":"https://rirtracker.com/ip/158.51.52.0-158.51.55.255/#e-c90f672db10eaae0","report_page":"https://rirtracker.com/arin/reports/2020-01-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.52.0-158.51.55.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2020-January/004040.html","retrieved_at":"2026-10-12T18:40:45+00:00","summary":"ARIN-Issued report for 2020-01-03: \"Add 158.51.52.0-158.51.55.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200102.gz","retrieved_at":"2026-10-12T22:16:55+00:00","summary":"ARIN delegated statistics 2020-01-02 (produced 2020-01-02T15:00:13+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200104.gz","retrieved_at":"2026-10-12T22:17:07+00:00","summary":"ARIN delegated statistics 2020-01-04 (produced 2020-01-04T15:00:09+00:00), after the report: allocated (dated 2020-01-03)"}]}],"classification_history":{"47e0dcae4217c93d":[{"raw_change_id":569006,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:10+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Redbird Communications Inc (ARIN) to FlexNetworks (ARIN) on 2023-08-22 22:47 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."}],"c90f672db10eaae0":[{"raw_change_id":163099,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:46:45+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163099,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:41+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163099,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:25+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163099,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:41+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2020-01-03)"}}