{"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":"216.145.208.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/216.145.208.0-216.145.223.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-08-19)"},"current_holder":{"rir":"ARIN","org":"Mimecast North America Inc","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18660,"date":"2019-08-19T20:28:37Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Adknowledge, Inc.","recipient_org":"Mimecast North America Inc","range":"216.145.208.0/20","log":"ARIN"}],"events":[{"event_id":"93dfaa2459549df7","registry":"ARIN","report_date":"2019-08-19","source":"arin_issued","raw_action":"ADD","raw_line":"Add 216.145.208.0-216.145.223.255","resource_type":"ipv4","resource":"216.145.208.0/20","start":"216.145.208.0","end":"216.145.223.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Adknowledge, Inc.","recipient_organization":"Mimecast North America Inc","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:34+00:00","page":"https://rirtracker.com/ip/216.145.208.0-216.145.223.255/#e-93dfaa2459549df7","report_page":"https://rirtracker.com/arin/reports/2019-08-19/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.145.208.0-216.145.223.255.json","explanation":"ARIN's transfer log records a transfer from Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN) on 2019-08-19 20:28 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-August/003904.html","retrieved_at":"2026-10-12T18:40:35+00:00","summary":"ARIN-Issued report for 2019-08-19: \"Add 216.145.208.0-216.145.223.255\""},{"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 2019-08-19 20:28 UTC, Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN); resources moved: 216.145.208.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190818.gz","retrieved_at":"2026-10-12T22:09:50+00:00","summary":"ARIN delegated statistics 2019-08-18 (produced 2019-08-18T14:00:13+00:00), before the report: allocated (dated 2006-04-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190820.gz","retrieved_at":"2026-10-12T22:09:55+00:00","summary":"ARIN delegated statistics 2019-08-20 (produced 2019-08-20T14:00:13+00:00), after the report: assigned (dated 2019-08-19)"}]}],"classification_history":{"93dfaa2459549df7":[{"raw_change_id":160903,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:45:14+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN) on 2019-08-19 20:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160903,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN) on 2019-08-19 20:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160903,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:19+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN) on 2019-08-19 20:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":160903,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:34+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Adknowledge, Inc. (ARIN) to Mimecast North America Inc (ARIN) on 2019-08-19 20:28 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 2019-08-19)"}}