{"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":"131.150.160.0 - 131.150.189.255","resource_type":"ipv4","page":"https://rirtracker.com/ip/131.150.160.0-131.150.189.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2017-11-27)"},"current_holder":{"rir":"ARIN","org":"Charter Communications","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":11484,"date":"2017-11-27T15:06:38Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Northern Telecom Canada Ltd.","recipient_org":"Charter Communications","range":"131.150.160.0/20","log":"ARIN"},{"id":11485,"date":"2017-11-27T15:06:38Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Northern Telecom Canada Ltd.","recipient_org":"Charter Communications","range":"131.150.176.0/21","log":"ARIN"},{"id":11458,"date":"2017-11-27T15:06:38Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Northern Telecom Canada Ltd.","recipient_org":"Charter Communications","range":"131.150.184.0/22","log":"ARIN"},{"id":11459,"date":"2017-11-27T15:06:38Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Northern Telecom Canada Ltd.","recipient_org":"Charter Communications","range":"131.150.188.0/23","log":"ARIN"}],"events":[{"event_id":"e1781bb1e9815854","registry":"ARIN","report_date":"2017-11-27","source":"arin_issued","raw_action":"ADD","raw_line":"Add 131.150.160.0-131.150.189.255","resource_type":"ipv4","resource":"131.150.160.0 - 131.150.189.255","start":"131.150.160.0","end":"131.150.189.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Northern Telecom Canada Ltd.","recipient_organization":"Charter Communications","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:00+00:00","page":"https://rirtracker.com/ip/131.150.160.0-131.150.189.255/#e-e1781bb1e9815854","report_page":"https://rirtracker.com/arin/reports/2017-11-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.150.160.0-131.150.189.255.json","explanation":"ARIN's transfer log records a transfer from Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN), recorded as 4 transfer records that together cover exactly this range, on 2017-11-27 15:06 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/2017-November/003274.html","retrieved_at":"2026-10-12T18:39:51+00:00","summary":"ARIN-Issued report for 2017-11-27: \"Add 131.150.160.0-131.150.189.255\""},{"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 2017-11-27 15:06 UTC, Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN); resources moved: 131.150.160.0/20"},{"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 2017-11-27 15:06 UTC, Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN); resources moved: 131.150.184.0/22"},{"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 2017-11-27 15:06 UTC, Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN); resources moved: 131.150.188.0/23"},{"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 2017-11-27 15:06 UTC, Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN); resources moved: 131.150.176.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171126.gz","retrieved_at":"2026-10-12T21:37:57+00:00","summary":"ARIN delegated statistics 2017-11-26 (produced 2017-11-26T06:08:28+00:00), before the report: assigned (dated 1988-01-25)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171128.gz","retrieved_at":"2026-10-12T21:38:02+00:00","summary":"ARIN delegated statistics 2017-11-28 (produced 2017-11-28T06:09:49+00:00), after the report: allocated (dated 2017-11-27)"}]},{"event_id":"63fbb149721c7ec4","registry":"ARIN","report_date":"2012-05-15","source":"arin_issued","raw_action":"ADD","raw_line":"Add 131.150.160.0-131.150.189.255","resource_type":"ipv4","resource":"131.150.160.0 - 131.150.189.255","start":"131.150.160.0","end":"131.150.189.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:59+00:00","page":"https://rirtracker.com/ip/131.150.160.0-131.150.189.255/#e-63fbb149721c7ec4","report_page":"https://rirtracker.com/arin/reports/2012-05-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.150.160.0-131.150.189.255.json","explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1988-11-23) on 2012-05-14 and assigned (dated 2012-05-15) on 2012-05-16. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change).","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2012-May/001251.html","retrieved_at":"2026-10-12T18:37:31+00:00","summary":"ARIN-Issued report for 2012-05-15: \"Add 131.150.160.0-131.150.189.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2012/delegated-arin-20120514.gz","retrieved_at":"2026-10-12T19:35:33+00:00","summary":"ARIN delegated statistics 2012-05-14, before the report: assigned (dated 1988-11-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2012/delegated-arin-20120516.gz","retrieved_at":"2026-10-12T19:35:38+00:00","summary":"ARIN delegated statistics 2012-05-16, after the report: assigned (dated 2012-05-15)"}]}],"classification_history":{"e1781bb1e9815854":[{"raw_change_id":152224,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:39:40+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN), recorded as 4 transfer records that together cover exactly this range, on 2017-11-27 15:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152224,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:10+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN), recorded as 4 transfer records that together cover exactly this range, on 2017-11-27 15:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152224,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:51+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN), recorded as 4 transfer records that together cover exactly this range, on 2017-11-27 15:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152224,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:00+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Northern Telecom Canada Ltd. (ARIN) to Charter Communications (ARIN), recorded as 4 transfer records that together cover exactly this range, on 2017-11-27 15:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"63fbb149721c7ec4":[{"raw_change_id":126213,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:17:14+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1988-11-23) on 2012-05-14 and assigned (dated 2012-05-15) on 2012-05-16. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":126213,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:24+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1988-11-23) on 2012-05-14 and assigned (dated 2012-05-15) on 2012-05-16. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":126213,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:59+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1988-11-23) on 2012-05-14 and assigned (dated 2012-05-15) on 2012-05-16. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":126213,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:59+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1988-11-23) on 2012-05-14 and assigned (dated 2012-05-15) on 2012-05-16. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."}]},"arin_statistics_now":{"status":"allocated (dated 2017-11-27)"}}