{"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":"AS128","resource_type":"asn","page":"https://rirtracker.com/asn/128/","statistics_now":{"registry":"ARIN","status":"assigned (dated 1987-09-23)"},"current_holder":{"rir":"ARIN","org":"Booz Allen Hamilton Inc.","handle":"BAH-2-Z","how":"RDAP, looked up 2026-11-07 18:21 UTC"},"rdap_snapshots":[{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-11-07T18:21:40+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-31T18:25:52+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-28T18:20:28+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-22T19:21:12+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-15T18:23:51+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-12T18:18:26+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"},{"resource_type":"asn","start_key":"00000000000000000000000000000080","end_key":"00000000000000000000000000000080","captured_at":"2026-10-09T20:17:35+00:00","reason":"watch","authoritative_rir":"ARIN","handle":"AS128","name":"ADS-AS","status":"active","org_handle":"BAH-2-Z","org_name":"Booz Allen Hamilton Inc.","registration_date":"1987-09-23T00:00:00-04:00","last_changed_date":"2024-04-10T09:20:14-04:00","rdap_url":"https://rdap.arin.net/registry/autnum/128"}],"transfers":[{"id":3896,"date":"2024-04-10T13:20:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Advanced Decision Systems","recipient_org":"Booz Allen Hamilton Inc.","range":"AS128","log":"ARIN"}],"events":[{"event_id":"a9a2cdeb141a3da9","registry":"ARIN","report_date":"2024-04-10","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS128","start":128,"end":128,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Advanced Decision Systems","recipient_organization":"Booz Allen Hamilton Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:14+00:00","page":"https://rirtracker.com/asn/128/#e-a9a2cdeb141a3da9","report_page":"https://rirtracker.com/arin/reports/2024-04-10/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/128.json","observed":"Merger/acquisition: Advanced Decision Systems (ARIN) to Booz Allen Hamilton Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Advanced Decision Systems (ARIN) to Booz Allen Hamilton Inc. (ARIN) on 2024-04-10 13:20 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 2024-04-10 13:20 UTC, Advanced Decision Systems (ARIN) to Booz Allen Hamilton Inc. (ARIN); resources moved: AS128"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240409.gz","retrieved_at":"2026-10-12T23:38:11+00:00","summary":"ARIN delegated statistics 2024-04-09 (produced 2024-04-09T13:00:46+00:00), before the report: assigned (dated 1987-09-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240411.gz","retrieved_at":"2026-10-12T23:38:16+00:00","summary":"ARIN delegated statistics 2024-04-11 (produced 2024-04-11T13:00:50+00:00), after the report: assigned (dated 1987-09-23)"}]}],"classification_history":{"a9a2cdeb141a3da9":[{"raw_change_id":570646,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:14+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Advanced Decision Systems (ARIN) to Booz Allen Hamilton Inc. (ARIN) on 2024-04-10 13:20 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":"assigned (dated 1987-09-23)"}}