{"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":"207.53.250.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/207.53.250.0-207.53.250.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-09-30)"},"current_holder":{"rir":"ARIN","org":"Klaviyo, Inc","how":"ARIN's statistics for 2026-10-09 and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":45754,"date":"2026-09-30T11:52:33Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"R & S VENTURES, LLC","recipient_org":"Klaviyo, Inc","range":"207.53.250.0/24"},{"id":16996,"date":"2019-02-20T19:09:27Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"BAMBOO CRICKET","recipient_org":"R & S VENTURES, LLC","range":"207.53.250.0/23"},{"id":16851,"date":"2019-01-23T19:39:28Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"1505820 Ontario Inc.","recipient_org":"BAMBOO CRICKET","range":"207.53.240.0/20"}],"events":[{"event_id":"23e86a821f02cc4f","report_date":"2026-09-30","source":"arin_issued","raw_action":"ADD","raw_line":"Add 207.53.250.0-207.53.250.255","resource_type":"ipv4","resource":"207.53.250.0/24","start":"207.53.250.0","end":"207.53.250.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"R & S VENTURES, LLC","recipient_organization":"Klaviyo, Inc","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","page":"https://rirtracker.com/ip/207.53.250.0-207.53.250.255/#e-23e86a821f02cc4f","evidence_url":"https://rirtracker.com/api/v1/events/23e86a821f02cc4f.json","piece_of":{"resource":"207.53.250.0/23","page":"https://rirtracker.com/ip/207.53.250.0-207.53.251.255/"},"explanation":"ARIN's transfer log records a transfer from R & S VENTURES, LLC (ARIN) to Klaviyo, Inc (ARIN) on 2026-09-30 11:52 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/2026-September/006504.html","retrieved_at":"2026-10-09T18:54:09+00:00","summary":"ARIN-Issued report for 2026-09-30: \"Add 207.53.250.0-207.53.250.255\""},{"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 2026-09-30 11:52 UTC, R & S VENTURES, LLC (ARIN) to Klaviyo, Inc (ARIN); resources moved: 207.53.250.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260929","retrieved_at":"2026-10-09T19:08:23+00:00","summary":"ARIN delegated statistics 2026-09-29 (produced 2026-09-29T13:00:20+00:00), before the report: allocated (dated 2019-02-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261001","retrieved_at":"2026-10-09T19:08:30+00:00","summary":"ARIN delegated statistics 2026-10-01 (produced 2026-10-01T13:00:21+00:00), after the report: allocated (dated 2026-09-30)"}]}],"classification_history":{"23e86a821f02cc4f":[{"raw_change_id":4756,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from R & S VENTURES, LLC (ARIN) to Klaviyo, Inc (ARIN) on 2026-09-30 11:52 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]}}