{"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":"141.231.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/141.231.0.0-141.231.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2022-07-08)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":89780,"date":"2022-09-27T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"ARIN","source_org":"Mizuho International PLC","recipient_org":null,"range":"141.231.0.0/16","log":"RIPE NCC"},{"id":29277,"date":"2022-09-27T11:31:21Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"ARIN","source_org":"Mizuho International PLC","recipient_org":"Amazon.com, Inc.","range":"141.231.0.0/16","log":"ARIN"}],"events":[{"event_id":"f151f2c9f96457b1","registry":"ARIN","report_date":"2022-09-27","source":"arin_issued","raw_action":"ADD","raw_line":"Add 141.231.0.0-141.231.255.255","resource_type":"ipv4","resource":"141.231.0.0/16","start":"141.231.0.0","end":"141.231.255.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into ARIN","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"ARIN","source_organization":"Mizuho International PLC","recipient_organization":"Amazon.com, Inc.","inventory_effect":"Transferred into ARIN administration; not a new issuance","inventory_effect_code":"TRANSFER_IN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:29+00:00","page":"https://rirtracker.com/ip/141.231.0.0-141.231.255.255/#e-f151f2c9f96457b1","report_page":"https://rirtracker.com/arin/reports/2022-09-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/141.231.0.0-141.231.255.255.json","same_transfer_as":"492b43d336d829c4","explanation":"ARIN's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN) on 2022-09-27 11:31 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2022-September/005037.html","retrieved_at":"2026-10-12T18:41:53+00:00","summary":"ARIN-Issued report for 2022-09-27: \"Add 141.231.0.0-141.231.255.255\""},{"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 2022-09-27 11:31 UTC, Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN); resources moved: 141.231.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220926.gz","retrieved_at":"2026-10-12T23:08:26+00:00","summary":"ARIN delegated statistics 2022-09-26 (produced 2022-09-26T13:00:09+00:00), before the report: not listed"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220928.gz","retrieved_at":"2026-10-12T23:08:31+00:00","summary":"ARIN delegated statistics 2022-09-28 (produced 2022-09-28T13:00:10+00:00), after the report: allocated (dated 2022-09-27)"}]},{"event_id":"492b43d336d829c4","registry":"RIPE NCC","report_date":"2022-09-27","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"141.231.0.0/16","start":"141.231.0.0","end":"141.231.255.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of the RIPE NCC","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"ARIN","source_organization":"Mizuho International PLC","recipient_organization":null,"inventory_effect":"Transferred out of RIPE NCC administration; not offered to RIPE NCC applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:13+00:00","page":"https://rirtracker.com/ip/141.231.0.0-141.231.255.255/#e-492b43d336d829c4","report_page":"https://rirtracker.com/ripe/reports/2022-09-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/141.231.0.0-141.231.255.255.json","observed":"Transfer: Mizuho International PLC (RIPE NCC) to (no name) (ARIN)","same_transfer_as":"f151f2c9f96457b1","explanation":"The RIPE NCC's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to an unnamed organization (ARIN) on 2022-09-27 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants.","evidence":[{"type":"transfer","url":"https://ftp.ripe.net/pub/stats/ripencc/transfers/transfers_latest.json","retrieved_at":"2026-10-13T21:49:37+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2022-09-27 19:00 UTC, Mizuho International PLC (RIPE NCC) to (no name) (ARIN); resources moved: 141.231.0.0/16"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2022/delegated-ripencc-extended-20220926.bz2","retrieved_at":"2026-10-12T23:44:54+00:00","summary":"RIPE NCC delegated statistics 2022-09-26 (produced 2022-09-26T21:59:59+00:00), before the change: assigned (dated 1993-09-01)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2022/delegated-ripencc-extended-20220927.bz2","retrieved_at":"2026-10-12T23:45:17+00:00","summary":"RIPE NCC delegated statistics 2022-09-27 (produced 2022-09-27T21:59:59+00:00), after the change: not listed"}]}],"classification_history":{"f151f2c9f96457b1":[{"raw_change_id":178197,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:56:56+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN) on 2022-09-27 11:31 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":178197,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:17+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN) on 2022-09-27 11:31 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":178197,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:06+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN) on 2022-09-27 11:31 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":178197,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:29+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to Amazon.com, Inc. (ARIN) on 2022-09-27 11:31 UTC: it came to ARIN from the RIPE NCC. It was already issued by another registry, so this is not a new issuance."}],"492b43d336d829c4":[{"raw_change_id":90130,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:58:31+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to an unnamed organization (ARIN) on 2022-09-27 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants."},{"raw_change_id":90130,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:04:01+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to an unnamed organization (ARIN) on 2022-09-27 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants."},{"raw_change_id":90130,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:46:26+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to an unnamed organization (ARIN) on 2022-09-27 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants."},{"raw_change_id":90130,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:13+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a transfer from Mizuho International PLC (RIPE NCC) to an unnamed organization (ARIN) on 2022-09-27 19:00 UTC: it left the RIPE NCC for ARIN. It is not a new allocation and is not offered to RIPE NCC applicants."}]},"arin_statistics_now":{"status":"allocated (dated 2022-07-08)"}}