{"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":"172.81.4.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/172.81.4.0-172.81.7.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2021-05-03)"},"current_holder":{"rir":"ARIN","org":"BTIG LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":24548,"date":"2021-05-05T14:19:59Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Bass Trading LLC","recipient_org":"BTIG LLC","range":"172.81.4.0/22","log":"ARIN"}],"events":[{"event_id":"b3d26406cad7d24c","registry":"ARIN","report_date":"2021-05-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 172.81.4.0-172.81.7.255","resource_type":"ipv4","resource":"172.81.4.0/22","start":"172.81.4.0","end":"172.81.7.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Bass Trading LLC","recipient_organization":"BTIG LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:08+00:00","page":"https://rirtracker.com/ip/172.81.4.0-172.81.7.255/#e-b3d26406cad7d24c","report_page":"https://rirtracker.com/arin/reports/2021-05-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.81.4.0-172.81.7.255.json","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 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/2021-May/004525.html","retrieved_at":"2026-10-12T18:41:19+00:00","summary":"ARIN-Issued report for 2021-05-03: \"Add 172.81.4.0-172.81.7.255\""},{"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: MERGER_ACQUISITION on 2021-05-05 14:19 UTC, Bass Trading LLC (ARIN) to BTIG LLC (ARIN); resources moved: 172.81.4.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210502.gz","retrieved_at":"2026-10-12T22:42:05+00:00","summary":"ARIN delegated statistics 2021-05-02 (produced 2021-05-02T14:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210504.gz","retrieved_at":"2026-10-12T22:42:09+00:00","summary":"ARIN delegated statistics 2021-05-04 (produced 2021-05-04T14:00:13+00:00), after the report: assigned (dated 2021-05-03)"}]},{"event_id":"c1c16e85fd094e8c","registry":"ARIN","report_date":"2021-05-03","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.81.4.0-172.81.7.255","resource_type":"ipv4","resource":"172.81.4.0/22","start":"172.81.4.0","end":"172.81.7.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Bass Trading LLC","recipient_organization":"BTIG LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:08+00:00","page":"https://rirtracker.com/ip/172.81.4.0-172.81.7.255/#e-c1c16e85fd094e8c","report_page":"https://rirtracker.com/arin/reports/2021-05-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.81.4.0-172.81.7.255.json","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Remove\" 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/2021-May/004525.html","retrieved_at":"2026-10-12T18:41:19+00:00","summary":"ARIN-Issued report for 2021-05-03: \"Remove 172.81.4.0-172.81.7.255\""},{"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: MERGER_ACQUISITION on 2021-05-05 14:19 UTC, Bass Trading LLC (ARIN) to BTIG LLC (ARIN); resources moved: 172.81.4.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210502.gz","retrieved_at":"2026-10-12T22:42:05+00:00","summary":"ARIN delegated statistics 2021-05-02 (produced 2021-05-02T14:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210504.gz","retrieved_at":"2026-10-12T22:42:09+00:00","summary":"ARIN delegated statistics 2021-05-04 (produced 2021-05-04T14:00:13+00:00), after the report: assigned (dated 2021-05-03)"}]}],"classification_history":{"b3d26406cad7d24c":[{"raw_change_id":171239,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:52:21+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171239,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:02+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171239,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:48+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171239,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:08+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"c1c16e85fd094e8c":[{"raw_change_id":171231,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:52:21+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Remove\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171231,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:01+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Remove\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171231,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:48+00:00","current":0,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Remove\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":171231,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:08+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Bass Trading LLC (ARIN) to BTIG LLC (ARIN) on 2021-05-05 14:19 UTC. ARIN-Issued lists it as \"Remove\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2021-05-03)"}}