{"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":"144.91.128.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.91.128.0-144.91.159.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 1990-11-20)"},"current_holder":{"rir":"APNIC","org":"Japan Network Information Center/POTATO","how":"APNIC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":19065,"date":"2019-10-15T11:09:41Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"Mills College","recipient_org":"Asahikawa Cable Television Co., Ltd","range":"144.91.128.0/19","log":"ARIN"},{"id":126305,"date":"2019-10-15T04:01:20Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"MILLSC","recipient_org":"Japan Network Information Center/POTATO","range":"144.91.128.0/19","log":"APNIC"}],"events":[{"event_id":"2df243c572985420","registry":"APNIC","report_date":"2019-10-15","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"144.91.128.0/19","start":"144.91.128.0","end":"144.91.159.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into APNIC","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"MILLSC","recipient_organization":"Japan Network Information Center/POTATO","inventory_effect":"Transferred into APNIC administration; not a new issuance","inventory_effect_code":"TRANSFER_IN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","page":"https://rirtracker.com/ip/144.91.128.0-144.91.159.255/#e-2df243c572985420","report_page":"https://rirtracker.com/apnic/reports/2019-10-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.91.128.0-144.91.159.255.json","observed":"Transfer: MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC)","same_transfer_as":"5392418b54dd3788","explanation":"APNIC's transfer log records a transfer from MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC) on 2019-10-15 04:01 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance.","evidence":[{"type":"transfer","url":"https://ftp.apnic.net/stats/apnic/transfers/transfers_latest.json","retrieved_at":"2026-10-13T18:17:16+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2019-10-15 04:01 UTC, MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC); resources moved: 144.91.128.0/19, 144.91.160.0/20"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20191015.gz","retrieved_at":"2026-10-12T23:04:11+00:00","summary":"APNIC delegated statistics 2019-10-15, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20191016.gz","retrieved_at":"2026-10-12T23:04:24+00:00","summary":"APNIC delegated statistics 2019-10-16, after the change: allocated (dated 1990-11-20)"}]},{"event_id":"5392418b54dd3788","registry":"ARIN","report_date":"2019-10-14","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"144.91.128.0/19","start":"144.91.128.0","end":"144.91.159.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"Mills College","recipient_organization":"Asahikawa Cable Television Co., Ltd","inventory_effect":"Transferred out of ARIN administration; not offered to ARIN applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:06:03+00:00","page":"https://rirtracker.com/ip/144.91.128.0-144.91.159.255/#e-5392418b54dd3788","report_page":"https://rirtracker.com/arin/reports/2019-10-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.91.128.0-144.91.159.255.json","observed":"144.91.128.0/19 assigned on 2019-10-14, not listed on 2019-10-15","same_transfer_as":"2df243c572985420","explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC) on 2019-10-15 11:09 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191015.gz","retrieved_at":"2026-10-12T22:12:48+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 144.91.128.0/19 assigned on 2019-10-14, not listed on 2019-10-15"},{"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 2019-10-15 11:09 UTC, Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC); resources moved: 144.91.128.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191013.gz","retrieved_at":"2026-10-12T22:12:43+00:00","summary":"ARIN delegated statistics 2019-10-13 (produced 2019-10-13T14:00:16+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-20191015.gz","retrieved_at":"2026-10-12T22:12:48+00:00","summary":"ARIN delegated statistics 2019-10-15 (produced 2019-10-15T14:00:13+00:00), after the report: not listed"}]}],"classification_history":{"2df243c572985420":[{"raw_change_id":36116,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:06+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC) on 2019-10-15 04:01 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36116,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:01:53+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC) on 2019-10-15 04:01 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36116,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:03+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC) on 2019-10-15 04:01 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36116,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","current":1,"public_explanation":"APNIC's transfer log records a transfer from MILLSC (ARIN) to Japan Network Information Center/POTATO (APNIC) on 2019-10-15 04:01 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."}],"5392418b54dd3788":[{"raw_change_id":381374,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T05:32:15+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC) on 2019-10-15 11:09 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":381374,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:53+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC) on 2019-10-15 11:09 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":381374,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T15:01:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC) on 2019-10-15 11:09 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":381374,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:06:03+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Mills College (ARIN) to Asahikawa Cable Television Co., Ltd (APNIC) on 2019-10-15 11:09 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."}]},"arin_statistics_now":{"status":"not listed"}}