{"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":"144.91.176.0 - 144.91.255.255","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.91.176.0-144.91.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-09-05)"},"current_holder":{"rir":"ARIN","org":"NETWORK INNOVATIONS, INC.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18769,"date":"2019-09-05T18:52:50Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Mills College","recipient_org":"NETWORK INNOVATIONS, INC.","range":"144.91.176.0/20","log":"ARIN"},{"id":18770,"date":"2019-09-05T18:52:50Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Mills College","recipient_org":"NETWORK INNOVATIONS, INC.","range":"144.91.192.0/18","log":"ARIN"}],"events":[{"event_id":"809291bfb7a06b53","registry":"ARIN","report_date":"2019-09-05","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.91.176.0-144.91.255.255","resource_type":"ipv4","resource":"144.91.176.0 - 144.91.255.255","start":"144.91.176.0","end":"144.91.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Mills College","recipient_organization":"NETWORK INNOVATIONS, INC.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:36+00:00","page":"https://rirtracker.com/ip/144.91.176.0-144.91.255.255/#e-809291bfb7a06b53","report_page":"https://rirtracker.com/arin/reports/2019-09-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.91.176.0-144.91.255.255.json","piece_of":{"resource":"144.91.0.0/16","page":"https://rirtracker.com/ip/144.91.0.0-144.91.255.255/"},"explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN), recorded as 2 transfer records that together cover exactly this range, on 2019-09-05 18:52 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/2019-September/003920.html","retrieved_at":"2026-10-12T18:40:37+00:00","summary":"ARIN-Issued report for 2019-09-05: \"Add 144.91.176.0-144.91.255.255\""},{"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 2019-09-05 18:52 UTC, Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN); resources moved: 144.91.176.0/20"},{"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 2019-09-05 18:52 UTC, Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN); resources moved: 144.91.192.0/18"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190904.gz","retrieved_at":"2026-10-12T22:10:40+00:00","summary":"ARIN delegated statistics 2019-09-04 (produced 2019-09-04T14:00:17+00:00), before the report: assigned (dated 1990-11-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190906.gz","retrieved_at":"2026-10-12T22:10:45+00:00","summary":"ARIN delegated statistics 2019-09-06 (produced 2019-09-06T14:00:16+00:00), after the report: allocated (dated 2019-09-05)"}]}],"classification_history":{"809291bfb7a06b53":[{"raw_change_id":161436,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:45:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN), recorded as 2 transfer records that together cover exactly this range, on 2019-09-05 18:52 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161436,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:37+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN), recorded as 2 transfer records that together cover exactly this range, on 2019-09-05 18:52 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161436,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:20+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN), recorded as 2 transfer records that together cover exactly this range, on 2019-09-05 18:52 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161436,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:36+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to NETWORK INNOVATIONS, INC. (ARIN), recorded as 2 transfer records that together cover exactly this range, on 2019-09-05 18:52 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 2019-09-05)"}}