{"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":"173.255.16.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/173.255.16.0-173.255.31.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2010-07-08)"},"current_holder":{"rir":"ARIN","org":"Bell Canada","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":44945,"date":"2026-07-30T13:58:21Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"NorthernTel Limited Partnership","recipient_org":"Bell Canada","range":"173.255.16.0/20","log":"ARIN"},{"id":12743,"date":"2018-03-29T17:22:49Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"ONTel, Inc.  ","recipient_org":"Northern Telephone Ltd.","range":"173.255.16.0/20","log":"ARIN"}],"events":[{"event_id":"66d8337316b3e0aa","registry":"ARIN","report_date":"2026-07-30","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"173.255.16.0/20","start":"173.255.16.0","end":"173.255.31.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"NorthernTel Limited Partnership","recipient_organization":"Bell Canada","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:29+00:00","page":"https://rirtracker.com/ip/173.255.16.0-173.255.31.255/#e-66d8337316b3e0aa","report_page":"https://rirtracker.com/arin/reports/2026-07-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.255.16.0-173.255.31.255.json","observed":"Merger/acquisition: NorthernTel Limited Partnership (ARIN) to Bell Canada (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from NorthernTel Limited Partnership (ARIN) to Bell Canada (ARIN) on 2026-07-30 13:58 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 2026-07-30 13:58 UTC, NorthernTel Limited Partnership (ARIN) to Bell Canada (ARIN); resources moved: 173.255.16.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260729","retrieved_at":"2026-10-09T19:05:16+00:00","summary":"ARIN delegated statistics 2026-07-29 (produced 2026-07-29T13:00:20+00:00), before the report: allocated (dated 2010-07-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260731","retrieved_at":"2026-10-09T19:05:22+00:00","summary":"ARIN delegated statistics 2026-07-31 (produced 2026-07-31T13:00:21+00:00), after the report: allocated (dated 2010-07-08)"}]},{"event_id":"410a80f7a9be9e21","registry":"ARIN","report_date":"2018-03-29","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"173.255.16.0/20","start":"173.255.16.0","end":"173.255.31.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"ONTel, Inc.  ","recipient_organization":"Northern Telephone Ltd.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:34+00:00","page":"https://rirtracker.com/ip/173.255.16.0-173.255.31.255/#e-410a80f7a9be9e21","report_page":"https://rirtracker.com/arin/reports/2018-03-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.255.16.0-173.255.31.255.json","observed":"Merger/acquisition: ONTel, Inc.   (ARIN) to Northern Telephone Ltd. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from ONTel, Inc.   (ARIN) to Northern Telephone Ltd. (ARIN) on 2018-03-29 17:22 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 2018-03-29 17:22 UTC, ONTel, Inc.   (ARIN) to Northern Telephone Ltd. (ARIN); resources moved: 173.255.16.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180328.gz","retrieved_at":"2026-10-12T21:43:48+00:00","summary":"ARIN delegated statistics 2018-03-28 (produced 2018-03-28T05:11:27+00:00), before the report: allocated (dated 2010-07-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180330.gz","retrieved_at":"2026-10-12T21:44:00+00:00","summary":"ARIN delegated statistics 2018-03-30 (produced 2018-03-30T05:12:17+00:00), after the report: allocated (dated 2010-07-08)"}]},{"event_id":"d6cc21fbe9c6ef16","registry":"ARIN","report_date":"2010-07-08","source":"arin_issued","raw_action":"ADD","raw_line":"Add 173.255.16.0-173.255.31.255","resource_type":"ipv4","resource":"173.255.16.0/20","start":"173.255.16.0","end":"173.255.31.255","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":"2026-10-13T23:50:49+00:00","page":"https://rirtracker.com/ip/173.255.16.0-173.255.31.255/#e-d6cc21fbe9c6ef16","report_page":"https://rirtracker.com/arin/reports/2010-07-08/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.255.16.0-173.255.31.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-07-07 and allocated (dated 2010-07-08) on 2010-07-09. (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-July/000570.html","retrieved_at":"2026-10-12T18:36:45+00:00","summary":"ARIN-Issued report for 2010-07-08: \"Add 173.255.16.0-173.255.31.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100707.gz","retrieved_at":"2026-10-12T19:07:26+00:00","summary":"ARIN delegated statistics 2010-07-07, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100709.gz","retrieved_at":"2026-10-12T19:07:30+00:00","summary":"ARIN delegated statistics 2010-07-09, after the report: allocated (dated 2010-07-08)"}]}],"classification_history":{"66d8337316b3e0aa":[{"raw_change_id":576769,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:29+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from NorthernTel Limited Partnership (ARIN) to Bell Canada (ARIN) on 2026-07-30 13:58 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."}],"410a80f7a9be9e21":[{"raw_change_id":554323,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:34+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from ONTel, Inc.   (ARIN) to Northern Telephone Ltd. (ARIN) on 2018-03-29 17:22 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."}],"d6cc21fbe9c6ef16":[{"raw_change_id":121537,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:21+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-07-07 and allocated (dated 2010-07-08) on 2010-07-09. (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."},{"raw_change_id":121537,"classification_code":"APPARENT_NEW_ISSUANCE","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 2010-07-07 and allocated (dated 2010-07-08) on 2010-07-09. (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."},{"raw_change_id":121537,"classification_code":"APPARENT_NEW_ISSUANCE","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 2010-07-07 and allocated (dated 2010-07-08) on 2010-07-09. (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."},{"raw_change_id":121537,"classification_code":"APPARENT_NEW_ISSUANCE","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 2010-07-07 and allocated (dated 2010-07-08) on 2010-07-09. (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 2010-07-08)"}}