{"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":"40.253.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/40.253.0.0-40.253.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2023-09-29)"},"current_holder":{"rir":"ARIN","org":"Microsoft Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":33136,"date":"2023-09-29T16:38:16Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Eli Lilly and Company","recipient_org":"Microsoft Corporation","range":"40.253.0.0/16","log":"ARIN"}],"events":[{"event_id":"c64c65474077ecaa","registry":"ARIN","report_date":"2023-09-29","source":"arin_issued","raw_action":"ADD","raw_line":"Add 40.253.0.0-40.253.255.255","resource_type":"ipv4","resource":"40.253.0.0/16","start":"40.253.0.0","end":"40.253.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Eli Lilly and Company","recipient_organization":"Microsoft Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:51+00:00","page":"https://rirtracker.com/ip/40.253.0.0-40.253.255.255/#e-c64c65474077ecaa","report_page":"https://rirtracker.com/arin/reports/2023-09-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/40.253.0.0-40.253.255.255.json","piece_of":{"resource":"40.0.0.0/8","page":"https://rirtracker.com/ip/40.0.0.0-40.255.255.255/"},"explanation":"ARIN's transfer log records a transfer from Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN) on 2023-09-29 16:38 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/2023-September/005404.html","retrieved_at":"2026-10-12T18:42:19+00:00","summary":"ARIN-Issued report for 2023-09-29: \"Add 40.253.0.0-40.253.255.255\""},{"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 2023-09-29 16:38 UTC, Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN); resources moved: 40.253.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230928.gz","retrieved_at":"2026-10-12T23:27:48+00:00","summary":"ARIN delegated statistics 2023-09-28 (produced 2023-09-28T13:00:12+00:00), before the report: allocated (dated 1991-04-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230930.gz","retrieved_at":"2026-10-12T23:27:53+00:00","summary":"ARIN delegated statistics 2023-09-30 (produced 2023-09-30T13:00:15+00:00), after the report: allocated (dated 2023-09-29)"}]}],"classification_history":{"c64c65474077ecaa":[{"raw_change_id":183620,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:06+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN) on 2023-09-29 16:38 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":183620,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:33+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN) on 2023-09-29 16:38 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":183620,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:24+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN) on 2023-09-29 16:38 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":183620,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:51+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Eli Lilly and Company (ARIN) to Microsoft Corporation (ARIN) on 2023-09-29 16:38 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 2023-09-29)"}}