{"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":"74.123.176.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/74.123.176.0-74.123.179.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2010-03-24)"},"current_holder":{"rir":"ARIN","org":"Microsoft Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":36918,"date":"2024-10-15T12:32:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"NUANCE COMMUNICATIONS, INC","recipient_org":"Microsoft Corporation","range":"74.123.176.0/22","log":"ARIN"},{"id":24693,"date":"2021-05-20T18:30:29Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Varolii Corporation","recipient_org":"NUANCE COMMUNICATIONS, INC","range":"74.123.176.0/22","log":"ARIN"}],"events":[{"event_id":"bb4846395c7e735f","registry":"ARIN","report_date":"2024-10-15","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"74.123.176.0/22","start":"74.123.176.0","end":"74.123.179.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"NUANCE COMMUNICATIONS, INC","recipient_organization":"Microsoft Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","page":"https://rirtracker.com/ip/74.123.176.0-74.123.179.255/#e-bb4846395c7e735f","report_page":"https://rirtracker.com/arin/reports/2024-10-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/74.123.176.0-74.123.179.255.json","observed":"Merger/acquisition: NUANCE COMMUNICATIONS, INC (ARIN) to Microsoft Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from NUANCE COMMUNICATIONS, INC (ARIN) to Microsoft Corporation (ARIN) on 2024-10-15 12:32 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 2024-10-15 12:32 UTC, NUANCE COMMUNICATIONS, INC (ARIN) to Microsoft Corporation (ARIN); resources moved: 74.123.176.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241014.gz","retrieved_at":"2026-10-12T23:48:11+00:00","summary":"ARIN delegated statistics 2024-10-14 (produced 2024-10-14T13:01:00+00:00), before the report: allocated (dated 2010-03-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241016.gz","retrieved_at":"2026-10-12T23:48:15+00:00","summary":"ARIN delegated statistics 2024-10-16 (produced 2024-10-16T13:00:55+00:00), after the report: allocated (dated 2010-03-24)"}]},{"event_id":"cbc345a1fee7593b","registry":"ARIN","report_date":"2021-05-20","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"74.123.176.0/22","start":"74.123.176.0","end":"74.123.179.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Varolii Corporation","recipient_organization":"NUANCE COMMUNICATIONS, INC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:56+00:00","page":"https://rirtracker.com/ip/74.123.176.0-74.123.179.255/#e-cbc345a1fee7593b","report_page":"https://rirtracker.com/arin/reports/2021-05-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/74.123.176.0-74.123.179.255.json","observed":"Merger/acquisition: Varolii Corporation (ARIN) to NUANCE COMMUNICATIONS, INC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Varolii Corporation (ARIN) to NUANCE COMMUNICATIONS, INC (ARIN) on 2021-05-20 18:30 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 2021-05-20 18:30 UTC, Varolii Corporation (ARIN) to NUANCE COMMUNICATIONS, INC (ARIN); resources moved: 74.123.176.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210519.gz","retrieved_at":"2026-10-12T22:42:55+00:00","summary":"ARIN delegated statistics 2021-05-19 (produced 2021-05-19T14:00:13+00:00), before the report: assigned (dated 2010-03-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210521.gz","retrieved_at":"2026-10-12T22:43:08+00:00","summary":"ARIN delegated statistics 2021-05-21 (produced 2021-05-21T14:00:14+00:00), after the report: allocated (dated 2010-03-24)"}]},{"event_id":"9f2ac6ad20ec74c5","registry":"ARIN","report_date":"2010-03-24","source":"arin_issued","raw_action":"ADD","raw_line":"Add 74.123.176.0-74.123.179.255","resource_type":"ipv4","resource":"74.123.176.0/22","start":"74.123.176.0","end":"74.123.179.255","classification":"APPARENT_NEW_ISSUANCE","classification_label":"Apparent new issuance","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:48+00:00","page":"https://rirtracker.com/ip/74.123.176.0-74.123.179.255/#e-9f2ac6ad20ec74c5","report_page":"https://rirtracker.com/arin/reports/2010-03-24/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/74.123.176.0-74.123.179.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-03-23 and assigned (dated 2010-03-24) on 2010-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-March/000463.html","retrieved_at":"2026-10-12T18:36:36+00:00","summary":"ARIN-Issued report for 2010-03-24: \"Add 74.123.176.0-74.123.179.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100323.gz","retrieved_at":"2026-10-12T19:02:57+00:00","summary":"ARIN delegated statistics 2010-03-23, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100325.gz","retrieved_at":"2026-10-12T19:03:02+00:00","summary":"ARIN delegated statistics 2010-03-25, after the report: assigned (dated 2010-03-24)"}]}],"classification_history":{"bb4846395c7e735f":[{"raw_change_id":571833,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from NUANCE COMMUNICATIONS, INC (ARIN) to Microsoft Corporation (ARIN) on 2024-10-15 12:32 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."}],"cbc345a1fee7593b":[{"raw_change_id":563311,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:56+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Varolii Corporation (ARIN) to NUANCE COMMUNICATIONS, INC (ARIN) on 2021-05-20 18:30 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."}],"9f2ac6ad20ec74c5":[{"raw_change_id":121069,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:11:57+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-03-23 and assigned (dated 2010-03-24) on 2010-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2009-01-14 (74.96.0.0-74.124.159.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121069,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:16+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-03-23 and assigned (dated 2010-03-24) on 2010-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2009-01-14 (74.96.0.0-74.124.159.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121069,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:49+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-03-23 and assigned (dated 2010-03-24) on 2010-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2009-01-14 (74.96.0.0-74.124.159.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121069,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:48+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-03-23 and assigned (dated 2010-03-24) on 2010-03-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2010-03-24)"}}