{"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":"128.81.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/128.81.0.0-128.81.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-07-21)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":21092,"date":"2020-07-21T11:44:37Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"WFA Group LLC","recipient_org":"Amazon.com, Inc.","range":"128.81.0.0/16","log":"ARIN"},{"id":19730,"date":"2020-01-09T21:36:31Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Symbolics, Inc.","recipient_org":"WFA Group LLC","range":"128.81.0.0/16","log":"ARIN"}],"events":[{"event_id":"f96d91e94161ecac","registry":"ARIN","report_date":"2020-07-21","source":"arin_issued","raw_action":"ADD","raw_line":"Add 128.81.0.0-128.81.255.255","resource_type":"ipv4","resource":"128.81.0.0/16","start":"128.81.0.0","end":"128.81.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"WFA Group LLC","recipient_organization":"Amazon.com, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:54+00:00","page":"https://rirtracker.com/ip/128.81.0.0-128.81.255.255/#e-f96d91e94161ecac","report_page":"https://rirtracker.com/arin/reports/2020-07-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/128.81.0.0-128.81.255.255.json","explanation":"ARIN's transfer log records a transfer from WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2020-07-21 11:44 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/2020-July/004239.html","retrieved_at":"2026-10-12T18:40:58+00:00","summary":"ARIN-Issued report for 2020-07-21: \"Add 128.81.0.0-128.81.255.255\""},{"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 2020-07-21 11:44 UTC, WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN); resources moved: 128.81.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200720.gz","retrieved_at":"2026-10-12T22:27:28+00:00","summary":"ARIN delegated statistics 2020-07-20 (produced 2020-07-20T14:00:12+00:00), before the report: assigned (dated 1985-12-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200722.gz","retrieved_at":"2026-10-12T22:27:32+00:00","summary":"ARIN delegated statistics 2020-07-22 (produced 2020-07-22T14:00:13+00:00), after the report: allocated (dated 2020-07-21)"}]},{"event_id":"d52153ac78c948db","registry":"ARIN","report_date":"2020-01-09","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"128.81.0.0/16","start":"128.81.0.0","end":"128.81.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Symbolics, Inc.","recipient_organization":"WFA Group LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:48+00:00","page":"https://rirtracker.com/ip/128.81.0.0-128.81.255.255/#e-d52153ac78c948db","report_page":"https://rirtracker.com/arin/reports/2020-01-09/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/128.81.0.0-128.81.255.255.json","observed":"Merger/acquisition: Symbolics, Inc. (ARIN) to WFA Group LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Symbolics, Inc. (ARIN) to WFA Group LLC (ARIN) on 2020-01-09 21:36 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 2020-01-09 21:36 UTC, Symbolics, Inc. (ARIN) to WFA Group LLC (ARIN); resources moved: 128.81.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200108.gz","retrieved_at":"2026-10-12T22:17:17+00:00","summary":"ARIN delegated statistics 2020-01-08 (produced 2020-01-08T15:00:09+00:00), before the report: assigned (dated 1985-12-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200110.gz","retrieved_at":"2026-10-12T22:17:23+00:00","summary":"ARIN delegated statistics 2020-01-10 (produced 2020-01-10T15:00:09+00:00), after the report: assigned (dated 1985-12-06)"}]}],"classification_history":{"f96d91e94161ecac":[{"raw_change_id":166629,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:49:05+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2020-07-21 11:44 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166629,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:51+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2020-07-21 11:44 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166629,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2020-07-21 11:44 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166629,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:54+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from WFA Group LLC (ARIN) to Amazon.com, Inc. (ARIN) on 2020-07-21 11:44 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"d52153ac78c948db":[{"raw_change_id":559860,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:48+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Symbolics, Inc. (ARIN) to WFA Group LLC (ARIN) on 2020-01-09 21:36 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 2020-07-21)"}}