{"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":"159.21.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/159.21.0.0-159.21.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 1992-02-27)"},"current_holder":{"rir":"ARIN","org":"STANTEC CONSULTING SERVICES INC.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":20601,"date":"2020-05-04T16:52:00Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"MWH Global, Inc.","recipient_org":"STANTEC CONSULTING SERVICES INC.","range":"159.21.0.0/16","log":"ARIN"}],"events":[{"event_id":"af3665474d97e1e0","registry":"ARIN","report_date":"2020-05-04","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"159.21.0.0/16","start":"159.21.0.0","end":"159.21.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"MWH Global, Inc.","recipient_organization":"STANTEC CONSULTING SERVICES INC.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:49+00:00","page":"https://rirtracker.com/ip/159.21.0.0-159.21.255.255/#e-af3665474d97e1e0","report_page":"https://rirtracker.com/arin/reports/2020-05-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/159.21.0.0-159.21.255.255.json","observed":"Merger/acquisition: MWH Global, Inc. (ARIN) to STANTEC CONSULTING SERVICES INC. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from MWH Global, Inc. (ARIN) to STANTEC CONSULTING SERVICES INC. (ARIN) on 2020-05-04 16:52 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 2020-05-04 16:52 UTC, MWH Global, Inc. (ARIN) to STANTEC CONSULTING SERVICES INC. (ARIN); resources moved: 159.21.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200503.gz","retrieved_at":"2026-10-12T22:23:22+00:00","summary":"ARIN delegated statistics 2020-05-03 (produced 2020-05-03T14:00:13+00:00), before the report: assigned (dated 1992-02-27)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200505.gz","retrieved_at":"2026-10-12T22:23:28+00:00","summary":"ARIN delegated statistics 2020-05-05 (produced 2020-05-05T14:00:13+00:00), after the report: assigned (dated 1992-02-27)"}]}],"classification_history":{"af3665474d97e1e0":[{"raw_change_id":560414,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:49+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from MWH Global, Inc. (ARIN) to STANTEC CONSULTING SERVICES INC. (ARIN) on 2020-05-04 16:52 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 1992-02-27)"}}