{"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":"173.0.160.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/173.0.160.0-173.0.175.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2017-03-28)"},"current_holder":{"rir":"ARIN","org":"Sohonet Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":9118,"date":"2017-03-28T14:06:52Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Dynamic Concepts, Inc.","recipient_org":"Sohonet Inc.","range":"173.0.160.0/20","log":"ARIN"}],"events":[{"event_id":"4178c6c4ec474c26","registry":"ARIN","report_date":"2017-03-28","source":"arin_issued","raw_action":"ADD","raw_line":"Add 173.0.160.0-173.0.175.255","resource_type":"ipv4","resource":"173.0.160.0/20","start":"173.0.160.0","end":"173.0.175.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Dynamic Concepts, Inc.","recipient_organization":"Sohonet Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:45+00:00","page":"https://rirtracker.com/ip/173.0.160.0-173.0.175.255/#e-4178c6c4ec474c26","report_page":"https://rirtracker.com/arin/reports/2017-03-28/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.160.0-173.0.175.255.json","explanation":"ARIN's transfer log records a transfer from Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN) on 2017-03-28 14:06 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/2017-March/003029.html","retrieved_at":"2026-10-12T18:39:34+00:00","summary":"ARIN-Issued report for 2017-03-28: \"Add 173.0.160.0-173.0.175.255\""},{"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 2017-03-28 14:06 UTC, Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN); resources moved: 173.0.160.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170327.gz","retrieved_at":"2026-10-12T21:25:40+00:00","summary":"ARIN delegated statistics 2017-03-27 (produced 2017-03-27T05:09:17+00:00), before the report: allocated (dated 2010-06-25)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170329.gz","retrieved_at":"2026-10-12T21:25:45+00:00","summary":"ARIN delegated statistics 2017-03-29 (produced 2017-03-29T05:09:56+00:00), after the report: allocated (dated 2017-03-28)"}]},{"event_id":"3eac8697fef8dcfc","registry":"ARIN","report_date":"2010-06-25","source":"arin_issued","raw_action":"ADD","raw_line":"Add 173.0.160.0-173.0.175.255","resource_type":"ipv4","resource":"173.0.160.0/20","start":"173.0.160.0","end":"173.0.175.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","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":"2026-10-13T23:50:49+00:00","page":"https://rirtracker.com/ip/173.0.160.0-173.0.175.255/#e-3eac8697fef8dcfc","report_page":"https://rirtracker.com/arin/reports/2010-06-25/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.160.0-173.0.175.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-24 and allocated (dated 2010-06-25) on 2010-06-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-June/000556.html","retrieved_at":"2026-10-12T18:36:43+00:00","summary":"ARIN-Issued report for 2010-06-25: \"Add 173.0.160.0-173.0.175.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100624.gz","retrieved_at":"2026-10-12T19:06:53+00:00","summary":"ARIN delegated statistics 2010-06-24, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100626.gz","retrieved_at":"2026-10-12T19:06:57+00:00","summary":"ARIN delegated statistics 2010-06-26, after the report: allocated (dated 2010-06-25)"}]}],"classification_history":{"4178c6c4ec474c26":[{"raw_change_id":148561,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:37:42+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN) on 2017-03-28 14:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148561,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:59+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN) on 2017-03-28 14:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148561,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:38+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN) on 2017-03-28 14:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148561,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:45+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Dynamic Concepts, Inc. (ARIN) to Sohonet Inc. (ARIN) on 2017-03-28 14:06 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"3eac8697fef8dcfc":[{"raw_change_id":121485,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:19+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-24 and allocated (dated 2010-06-25) on 2010-06-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121485,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:17+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-24 and allocated (dated 2010-06-25) on 2010-06-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121485,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:50+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-24 and allocated (dated 2010-06-25) on 2010-06-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121485,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-24 and allocated (dated 2010-06-25) on 2010-06-26. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2017-03-28)"}}