{"classifier_version":"1.0.0","generated":"2026-10-09T21:19:22+00:00","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by the American Registry for Internet Numbers (ARIN), the Number Resource Organization (NRO), or any 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":"131.123.0.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/131.123.0.0-131.123.31.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"not listed"},"current_holder":{"rir":"RIPE NCC","org":"Contrust Solutions S.R.L.","how":"the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":44489,"date":"2026-06-24T14:10:11Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"Kent State University","recipient_org":"Contrust Solutions S.R.L.","range":"131.123.0.0/19"}],"events":[{"event_id":"4213b5b825a5c32a","report_date":"2026-06-24","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"131.123.0.0/19","start":"131.123.0.0","end":"131.123.31.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_organization":"Kent State University","recipient_organization":"Contrust Solutions S.R.L.","inventory_effect":"Transferred out of ARIN administration; not offered to ARIN applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:30+00:00","page":"https://rirtracker.com/ip/131.123.0.0-131.123.31.255/#e-4213b5b825a5c32a","evidence_url":"https://rirtracker.com/api/v1/events/4213b5b825a5c32a.json","piece_of":{"resource":"131.123.0.0/16","page":"https://rirtracker.com/ip/131.123.0.0-131.123.255.255/"},"explanation":"ARIN's transfer log records a transfer from Kent State University (ARIN) to Contrust Solutions S.R.L. (RIPE NCC) on 2026-06-24 14:10 UTC: it left ARIN for RIPE NCC. 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/delegated-arin-extended-20260625","retrieved_at":"2026-10-09T19:03:26+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 131.123.0.0/19 allocated on 2026-06-24, not listed on 2026-06-25"},{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-09T18:54:15+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2026-06-24 14:10 UTC, Kent State University (ARIN) to Contrust Solutions S.R.L. (RIPE NCC); resources moved: 131.123.0.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260623","retrieved_at":"2026-10-09T19:03:19+00:00","summary":"ARIN delegated statistics 2026-06-23 (produced 2026-06-23T09:00:21+00:00), before the report: allocated (dated 1988-11-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260625","retrieved_at":"2026-10-09T19:03:26+00:00","summary":"ARIN delegated statistics 2026-06-25 (produced 2026-06-25T09:00:20+00:00), after the report: not listed"}]}],"classification_history":{"4213b5b825a5c32a":[{"raw_change_id":6935,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:30+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Kent State University (ARIN) to Contrust Solutions S.R.L. (RIPE NCC) on 2026-06-24 14:10 UTC: it left ARIN for RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."}]}}