{"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":"66.81.136.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.81.136.0-66.81.143.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-07-02)"},"current_holder":{"rir":"ARIN","org":"Siyeh Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":40846,"date":"2025-07-02T11:02:39Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"TPx Communications","recipient_org":"Siyeh Corporation","range":"66.81.136.0/21","log":"ARIN"},{"id":40763,"date":"2025-06-25T11:08:30Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"TPx Communications","recipient_org":"TPx Communications","range":"66.81.136.0/21","log":"ARIN"}],"events":[{"event_id":"bd474b58a1b8d936","registry":"ARIN","report_date":"2025-07-02","source":"arin_issued","raw_action":"ADD","raw_line":"Add 66.81.136.0-66.81.143.255","resource_type":"ipv4","resource":"66.81.136.0/21","start":"66.81.136.0","end":"66.81.143.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"TPx Communications","recipient_organization":"Siyeh Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:31+00:00","page":"https://rirtracker.com/ip/66.81.136.0-66.81.143.255/#e-bd474b58a1b8d936","report_page":"https://rirtracker.com/arin/reports/2025-07-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.81.136.0-66.81.143.255.json","explanation":"ARIN's transfer log records a transfer from TPx Communications (ARIN) to Siyeh Corporation (ARIN) on 2025-07-02 11:02 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/2025-July/006045.html","retrieved_at":"2026-10-12T18:43:05+00:00","summary":"ARIN-Issued report for 2025-07-02: \"Add 66.81.136.0-66.81.143.255\""},{"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 2025-07-02 11:02 UTC, TPx Communications (ARIN) to Siyeh Corporation (ARIN); resources moved: 66.81.136.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250701.gz","retrieved_at":"2026-10-13T00:02:37+00:00","summary":"ARIN delegated statistics 2025-07-01 (produced 2025-07-01T13:01:13+00:00), before the report: allocated (dated 2012-02-13)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250703.gz","retrieved_at":"2026-10-13T00:02:42+00:00","summary":"ARIN delegated statistics 2025-07-03 (produced 2025-07-03T13:01:12+00:00), after the report: allocated (dated 2025-07-02)"}]},{"event_id":"ba667da83616baf7","registry":"ARIN","report_date":"2025-06-25","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"66.81.136.0/21","start":"66.81.136.0","end":"66.81.143.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"TPx Communications","recipient_organization":"TPx Communications","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:22+00:00","page":"https://rirtracker.com/ip/66.81.136.0-66.81.143.255/#e-ba667da83616baf7","report_page":"https://rirtracker.com/arin/reports/2025-06-25/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.81.136.0-66.81.143.255.json","observed":"Merger/acquisition: TPx Communications (ARIN) to TPx Communications (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from TPx Communications (ARIN) to TPx Communications (ARIN) on 2025-06-25 11:08 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 2025-06-25 11:08 UTC, TPx Communications (ARIN) to TPx Communications (ARIN); resources moved: 66.81.136.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250624.gz","retrieved_at":"2026-10-13T00:02:10+00:00","summary":"ARIN delegated statistics 2025-06-24 (produced 2025-06-24T13:01:14+00:00), before the report: allocated (dated 2012-02-13)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250626.gz","retrieved_at":"2026-10-13T00:02:15+00:00","summary":"ARIN delegated statistics 2025-06-26 (produced 2025-06-26T13:01:12+00:00), after the report: allocated (dated 2012-02-13)"}]}],"classification_history":{"bd474b58a1b8d936":[{"raw_change_id":194869,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:07:08+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from TPx Communications (ARIN) to Siyeh Corporation (ARIN) on 2025-07-02 11:02 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194869,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:03+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from TPx Communications (ARIN) to Siyeh Corporation (ARIN) on 2025-07-02 11:02 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194869,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:57+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from TPx Communications (ARIN) to Siyeh Corporation (ARIN) on 2025-07-02 11:02 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":194869,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:31+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from TPx Communications (ARIN) to Siyeh Corporation (ARIN) on 2025-07-02 11:02 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"ba667da83616baf7":[{"raw_change_id":573949,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:22+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from TPx Communications (ARIN) to TPx Communications (ARIN) on 2025-06-25 11:08 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."}]},"arin_statistics_now":{"status":"allocated (dated 2025-07-02)"}}