{"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":"170.72.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/170.72.0.0-170.72.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-07-27)"},"current_holder":{"rir":"ARIN","org":"Cisco Webex LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":21154,"date":"2020-07-27T18:36:39Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Vivint Wireless, Inc.","recipient_org":"Cisco Webex LLC","range":"170.72.0.0/16","log":"ARIN"},{"id":5656,"date":"2015-03-11T19:53:18Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Dominion Nuclear Connecticut","recipient_org":"Vivint Wireless","range":"170.72.0.0/16","log":"ARIN"}],"events":[{"event_id":"f03690d96ed47d90","registry":"ARIN","report_date":"2020-07-27","source":"arin_issued","raw_action":"ADD","raw_line":"Add 170.72.0.0-170.72.255.255","resource_type":"ipv4","resource":"170.72.0.0/16","start":"170.72.0.0","end":"170.72.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Vivint Wireless, Inc.","recipient_organization":"Cisco Webex LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:54+00:00","page":"https://rirtracker.com/ip/170.72.0.0-170.72.255.255/#e-f03690d96ed47d90","report_page":"https://rirtracker.com/arin/reports/2020-07-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/170.72.0.0-170.72.255.255.json","explanation":"ARIN's transfer log records a transfer from Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN) on 2020-07-27 18:36 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/2020-July/004245.html","retrieved_at":"2026-10-12T18:40:58+00:00","summary":"ARIN-Issued report for 2020-07-27: \"Add 170.72.0.0-170.72.255.255\""},{"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 2020-07-27 18:36 UTC, Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN); resources moved: 170.72.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200726.gz","retrieved_at":"2026-10-12T22:27:42+00:00","summary":"ARIN delegated statistics 2020-07-26 (produced 2020-07-26T14:00:13+00:00), before the report: allocated (dated 2015-03-11)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200728.gz","retrieved_at":"2026-10-12T22:27:46+00:00","summary":"ARIN delegated statistics 2020-07-28 (produced 2020-07-28T14:00:12+00:00), after the report: allocated (dated 2020-07-27)"}]},{"event_id":"113dc5675edb9b2a","registry":"ARIN","report_date":"2015-03-11","source":"arin_issued","raw_action":"ADD","raw_line":"Add 170.72.0.0-170.72.255.255","resource_type":"ipv4","resource":"170.72.0.0/16","start":"170.72.0.0","end":"170.72.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Dominion Nuclear Connecticut","recipient_organization":"Vivint Wireless","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:20+00:00","page":"https://rirtracker.com/ip/170.72.0.0-170.72.255.255/#e-113dc5675edb9b2a","report_page":"https://rirtracker.com/arin/reports/2015-03-11/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/170.72.0.0-170.72.255.255.json","explanation":"ARIN's transfer log records a transfer from Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN) on 2015-03-11 19:53 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/2015-March/002282.html","retrieved_at":"2026-10-12T18:38:43+00:00","summary":"ARIN-Issued report for 2015-03-11: \"Add 170.72.0.0-170.72.255.255\""},{"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 2015-03-11 19:53 UTC, Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN); resources moved: 170.72.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150310.gz","retrieved_at":"2026-10-12T20:49:26+00:00","summary":"ARIN delegated statistics 2015-03-10 (produced 2015-03-10T05:05:06+00:00), before the report: assigned (dated 1994-08-12)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150312.gz","retrieved_at":"2026-10-12T20:49:31+00:00","summary":"ARIN delegated statistics 2015-03-12 (produced 2015-03-12T05:05:17+00:00), after the report: allocated (dated 2015-03-11)"}]}],"classification_history":{"f03690d96ed47d90":[{"raw_change_id":166714,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:49:08+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN) on 2020-07-27 18:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166714,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:51+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN) on 2020-07-27 18:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166714,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN) on 2020-07-27 18:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":166714,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:54+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Vivint Wireless, Inc. (ARIN) to Cisco Webex LLC (ARIN) on 2020-07-27 18:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"113dc5675edb9b2a":[{"raw_change_id":136312,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:29:42+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN) on 2015-03-11 19:53 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":136312,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:40+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN) on 2015-03-11 19:53 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":136312,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:17+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN) on 2015-03-11 19:53 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":136312,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:20+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Dominion Nuclear Connecticut (ARIN) to Vivint Wireless (ARIN) on 2015-03-11 19:53 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2020-07-27)"}}