{"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":"173.231.72.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/173.231.72.0-173.231.79.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-10-22)"},"current_holder":{"rir":"ARIN","org":"Y K Communications, LTD","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":19141,"date":"2019-10-22T16:37:17Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Affiniti PA LLC","recipient_org":"Y K Communications, LTD","range":"173.231.72.0/21","log":"ARIN"}],"events":[{"event_id":"ffc1e28aaf5bfc0d","registry":"ARIN","report_date":"2019-10-22","source":"arin_issued","raw_action":"ADD","raw_line":"Add 173.231.72.0-173.231.79.255","resource_type":"ipv4","resource":"173.231.72.0/21","start":"173.231.72.0","end":"173.231.79.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Affiniti PA LLC","recipient_organization":"Y K Communications, LTD","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:37+00:00","page":"https://rirtracker.com/ip/173.231.72.0-173.231.79.255/#e-ffc1e28aaf5bfc0d","report_page":"https://rirtracker.com/arin/reports/2019-10-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.231.72.0-173.231.79.255.json","explanation":"ARIN's transfer log records a transfer from Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN) on 2019-10-22 16:37 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/2019-October/003967.html","retrieved_at":"2026-10-12T18:40:39+00:00","summary":"ARIN-Issued report for 2019-10-22: \"Add 173.231.72.0-173.231.79.255\""},{"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 2019-10-22 16:37 UTC, Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN); resources moved: 173.231.72.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191021.gz","retrieved_at":"2026-10-12T22:13:03+00:00","summary":"ARIN delegated statistics 2019-10-21 (produced 2019-10-21T14:00:13+00:00), before the report: allocated (dated 2010-03-19)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191023.gz","retrieved_at":"2026-10-12T22:13:08+00:00","summary":"ARIN delegated statistics 2019-10-23 (produced 2019-10-23T14:00:12+00:00), after the report: allocated (dated 2019-10-22)"}]}],"classification_history":{"ffc1e28aaf5bfc0d":[{"raw_change_id":161993,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:46:00+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN) on 2019-10-22 16:37 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161993,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:38+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN) on 2019-10-22 16:37 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161993,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:22+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN) on 2019-10-22 16:37 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":161993,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:37+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Affiniti PA LLC (ARIN) to Y K Communications, LTD (ARIN) on 2019-10-22 16:37 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 2019-10-22)"}}