{"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":"198.133.199.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/198.133.199.0-198.133.199.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1993-04-28)"},"current_holder":{"rir":"ARIN","org":"Neustar Security Services","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":28187,"date":"2022-05-26T19:03:10Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"UltraDNS Corporation","recipient_org":"Neustar Security Services","range":"198.133.199.0/24","log":"ARIN"}],"events":[{"event_id":"c129d0e8381bc735","registry":"ARIN","report_date":"2022-05-26","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"198.133.199.0/24","start":"198.133.199.0","end":"198.133.199.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"UltraDNS Corporation","recipient_organization":"Neustar Security Services","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:02+00:00","page":"https://rirtracker.com/ip/198.133.199.0-198.133.199.255/#e-c129d0e8381bc735","report_page":"https://rirtracker.com/arin/reports/2022-05-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/198.133.199.0-198.133.199.255.json","observed":"Merger/acquisition: UltraDNS Corporation (ARIN) to Neustar Security Services (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from UltraDNS Corporation (ARIN) to Neustar Security Services (ARIN) on 2022-05-26 19:03 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.","evidence":[{"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: MERGER_ACQUISITION on 2022-05-26 19:03 UTC, UltraDNS Corporation (ARIN) to Neustar Security Services (ARIN); resources moved: 198.133.199.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220525.gz","retrieved_at":"2026-10-12T23:01:58+00:00","summary":"ARIN delegated statistics 2022-05-25 (produced 2022-05-25T13:00:13+00:00), before the report: allocated (dated 1993-04-28)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220527.gz","retrieved_at":"2026-10-12T23:02:02+00:00","summary":"ARIN delegated statistics 2022-05-27 (produced 2022-05-27T13:00:14+00:00), after the report: allocated (dated 1993-04-28)"}]}],"classification_history":{"c129d0e8381bc735":[{"raw_change_id":565777,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:02+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from UltraDNS Corporation (ARIN) to Neustar Security Services (ARIN) on 2022-05-26 19:03 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it."}]},"arin_statistics_now":{"status":"allocated (dated 1993-04-28)"}}