{"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":"144.253.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.253.0.0-144.253.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-07-18)"},"current_holder":{"rir":"ARIN","org":"Charter Communications","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":13675,"date":"2018-07-18T15:58:29Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Silicon Graphics International Corp.","recipient_org":"Charter Communications","range":"144.253.0.0/16","log":"ARIN"}],"events":[{"event_id":"5167dd437e93379c","registry":"ARIN","report_date":"2018-07-18","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.253.0.0-144.253.255.255","resource_type":"ipv4","resource":"144.253.0.0/16","start":"144.253.0.0","end":"144.253.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Silicon Graphics International Corp.","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":"2026-10-13T23:52:13+00:00","page":"https://rirtracker.com/ip/144.253.0.0-144.253.255.255/#e-5167dd437e93379c","report_page":"https://rirtracker.com/arin/reports/2018-07-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.253.0.0-144.253.255.255.json","explanation":"ARIN's transfer log records a transfer from Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN) on 2018-07-18 15:58 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-July/003507.html","retrieved_at":"2026-10-12T18:40:07+00:00","summary":"ARIN-Issued report for 2018-07-18: \"Add 144.253.0.0-144.253.255.255\""},{"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 2018-07-18 15:58 UTC, Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN); resources moved: 144.253.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180717.gz","retrieved_at":"2026-10-12T21:49:23+00:00","summary":"ARIN delegated statistics 2018-07-17 (produced 2018-07-17T05:00:25+00:00), before the report: assigned (dated 1991-01-15)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180719.gz","retrieved_at":"2026-10-12T21:49:28+00:00","summary":"ARIN delegated statistics 2018-07-19 (produced 2018-07-19T05:00:21+00:00), after the report: allocated (dated 2018-07-18)"}]}],"classification_history":{"5167dd437e93379c":[{"raw_change_id":155532,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:41:48+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN) on 2018-07-18 15:58 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":155532,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:20+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN) on 2018-07-18 15:58 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":155532,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:01+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN) on 2018-07-18 15:58 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":155532,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:13+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Silicon Graphics International Corp. (ARIN) to Charter Communications (ARIN) on 2018-07-18 15:58 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 2018-07-18)"}}