{"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":"199.91.151.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/199.91.151.0-199.91.151.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-02-26)"},"current_holder":{"rir":"ARIN","org":"Bitly Inc","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":12410,"date":"2018-02-26T21:05:53Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Unison Networks LLC","recipient_org":"Bitly Inc","range":"199.91.151.0/24","log":"ARIN"}],"events":[{"event_id":"b694b640dee6069d","registry":"ARIN","report_date":"2018-02-26","source":"arin_issued","raw_action":"ADD","raw_line":"Add 199.91.151.0-199.91.151.255","resource_type":"ipv4","resource":"199.91.151.0/24","start":"199.91.151.0","end":"199.91.151.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Unison Networks LLC","recipient_organization":"Bitly Inc","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:05+00:00","page":"https://rirtracker.com/ip/199.91.151.0-199.91.151.255/#e-b694b640dee6069d","report_page":"https://rirtracker.com/arin/reports/2018-02-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.91.151.0-199.91.151.255.json","explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Bitly Inc (ARIN) on 2018-02-26 21:05 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/2018-February/003365.html","retrieved_at":"2026-10-12T18:39:57+00:00","summary":"ARIN-Issued report for 2018-02-26: \"Add 199.91.151.0-199.91.151.255\""},{"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 2018-02-26 21:05 UTC, Unison Networks LLC (ARIN) to Bitly Inc (ARIN); resources moved: 199.91.151.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180225.gz","retrieved_at":"2026-10-12T21:42:20+00:00","summary":"ARIN delegated statistics 2018-02-25 (produced 2018-02-25T06:11:53+00:00), before the report: allocated (dated 2011-02-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180227.gz","retrieved_at":"2026-10-12T21:42:25+00:00","summary":"ARIN delegated statistics 2018-02-27 (produced 2018-02-27T09:18:56+00:00), after the report: assigned (dated 2018-02-26)"}]}],"classification_history":{"b694b640dee6069d":[{"raw_change_id":153480,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Bitly Inc (ARIN) on 2018-02-26 21:05 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153480,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:14+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Bitly Inc (ARIN) on 2018-02-26 21:05 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153480,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:55+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Bitly Inc (ARIN) on 2018-02-26 21:05 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153480,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:05+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Bitly Inc (ARIN) on 2018-02-26 21:05 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2018-02-26)"}}