{"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":"159.135.224.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/159.135.224.0-159.135.239.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2015-10-21)"},"current_holder":{"rir":"ARIN","org":"Mailgun Technologies Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":19164,"date":"2019-10-25T15:08:18Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Rackspace Hosting","recipient_org":"Mailgun Technologies Inc.","range":"159.135.224.0/20","log":"ARIN"},{"id":6071,"date":"2015-10-21T15:00:33Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"SM Financial Services Corporation","recipient_org":"Rackspace Hosting","range":"159.135.0.0/16","log":"ARIN"}],"events":[{"event_id":"d49d83900fc3346e","registry":"ARIN","report_date":"2019-10-25","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"159.135.224.0/20","start":"159.135.224.0","end":"159.135.239.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Rackspace Hosting","recipient_organization":"Mailgun Technologies Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:47+00:00","page":"https://rirtracker.com/ip/159.135.224.0-159.135.239.255/#e-d49d83900fc3346e","report_page":"https://rirtracker.com/arin/reports/2019-10-25/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/159.135.224.0-159.135.239.255.json","observed":"Merger/acquisition: Rackspace Hosting (ARIN) to Mailgun Technologies Inc. (ARIN)","piece_of":{"resource":"159.135.0.0/16","page":"https://rirtracker.com/ip/159.135.0.0-159.135.255.255/"},"explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Rackspace Hosting (ARIN) to Mailgun Technologies Inc. (ARIN) on 2019-10-25 15:08 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 2019-10-25 15:08 UTC, Rackspace Hosting (ARIN) to Mailgun Technologies Inc. (ARIN); resources moved: 159.135.224.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191024.gz","retrieved_at":"2026-10-12T22:13:11+00:00","summary":"ARIN delegated statistics 2019-10-24 (produced 2019-10-24T14:00:14+00:00), before the report: allocated (dated 2015-10-21)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20191026.gz","retrieved_at":"2026-10-12T22:13:26+00:00","summary":"ARIN delegated statistics 2019-10-26 (produced 2019-10-26T14:00:14+00:00), after the report: assigned (dated 2015-10-21)"}]}],"classification_history":{"d49d83900fc3346e":[{"raw_change_id":559516,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:47+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Rackspace Hosting (ARIN) to Mailgun Technologies Inc. (ARIN) on 2019-10-25 15:08 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 2015-10-21)"}}