{"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":"143.195.224.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/143.195.224.0-143.195.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2014-01-16)"},"current_holder":{"rir":"ARIN","org":"CITY OF AURORA","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":5451,"date":"2014-01-16T22:31:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Illinois Mathematics and Science Academy","recipient_org":"CITY OF AURORA","range":"143.195.224.0/19","log":"ARIN"}],"events":[{"event_id":"f5784f43bbfed2e3","registry":"ARIN","report_date":"2014-01-16","source":"arin_issued","raw_action":"ADD","raw_line":"Add 143.195.224.0-143.195.255.255","resource_type":"ipv4","resource":"143.195.224.0/19","start":"143.195.224.0","end":"143.195.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Illinois Mathematics and Science Academy","recipient_organization":"CITY OF AURORA","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:10+00:00","page":"https://rirtracker.com/ip/143.195.224.0-143.195.255.255/#e-f5784f43bbfed2e3","report_page":"https://rirtracker.com/arin/reports/2014-01-16/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/143.195.224.0-143.195.255.255.json","piece_of":{"resource":"143.195.0.0/16","page":"https://rirtracker.com/ip/143.195.0.0-143.195.255.255/"},"explanation":"ARIN's transfer log records a transfer from Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN) on 2014-01-16 22:31 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/2014-January/001864.html","retrieved_at":"2026-10-12T18:38:13+00:00","summary":"ARIN-Issued report for 2014-01-16: \"Add 143.195.224.0-143.195.255.255\""},{"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 2014-01-16 22:31 UTC, Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN); resources moved: 143.195.224.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140115.gz","retrieved_at":"2026-10-12T20:10:32+00:00","summary":"ARIN delegated statistics 2014-01-15 (produced 2014-01-15T06:04:03+00:00), before the report: assigned (dated 1990-10-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20140117.gz","retrieved_at":"2026-10-12T20:10:37+00:00","summary":"ARIN delegated statistics 2014-01-17 (produced 2014-01-17T06:04:07+00:00), after the report: assigned (dated 2014-01-16)"}]}],"classification_history":{"f5784f43bbfed2e3":[{"raw_change_id":131222,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:23:20+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN) on 2014-01-16 22:31 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":131222,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:32+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN) on 2014-01-16 22:31 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":131222,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:08+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN) on 2014-01-16 22:31 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":131222,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:10+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Illinois Mathematics and Science Academy (ARIN) to CITY OF AURORA (ARIN) on 2014-01-16 22:31 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 2014-01-16)"}}