{"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":"143.55.192.0/19","resource_type":"ipv4","page":"https://rirtracker.com/ip/143.55.192.0-143.55.223.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-06-17)"},"current_holder":{"rir":"ARIN","org":"Zayo Bandwidth","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":30745,"date":"2023-02-10T15:58:31Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Intelligent Fiber Network","recipient_org":"Zayo Bandwidth","range":"143.55.192.0/19","log":"ARIN"},{"id":20902,"date":"2020-06-18T01:28:42Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Fashion Institute of Technology","recipient_org":"Intelligent Fiber Network","range":"143.55.192.0/19","log":"ARIN"}],"events":[{"event_id":"22bf281529f63465","registry":"ARIN","report_date":"2023-02-10","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"143.55.192.0/19","start":"143.55.192.0","end":"143.55.223.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Intelligent Fiber Network","recipient_organization":"Zayo Bandwidth","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:07+00:00","page":"https://rirtracker.com/ip/143.55.192.0-143.55.223.255/#e-22bf281529f63465","report_page":"https://rirtracker.com/arin/reports/2023-02-10/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/143.55.192.0-143.55.223.255.json","observed":"Merger/acquisition: Intelligent Fiber Network (ARIN) to Zayo Bandwidth (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Intelligent Fiber Network (ARIN) to Zayo Bandwidth (ARIN) on 2023-02-10 15:58 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 2023-02-10 15:58 UTC, Intelligent Fiber Network (ARIN) to Zayo Bandwidth (ARIN); resources moved: 143.55.192.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230209.gz","retrieved_at":"2026-10-12T23:15:32+00:00","summary":"ARIN delegated statistics 2023-02-09 (produced 2023-02-09T14:00:10+00:00), before the report: allocated (dated 2020-06-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230211.gz","retrieved_at":"2026-10-12T23:15:48+00:00","summary":"ARIN delegated statistics 2023-02-11 (produced 2023-02-11T14:00:10+00:00), after the report: allocated (dated 2020-06-17)"}]},{"event_id":"8fc47b31afd69a23","registry":"ARIN","report_date":"2020-06-17","source":"arin_issued","raw_action":"ADD","raw_line":"Add 143.55.192.0-143.55.223.255","resource_type":"ipv4","resource":"143.55.192.0/19","start":"143.55.192.0","end":"143.55.223.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Fashion Institute of Technology","recipient_organization":"Intelligent Fiber Network","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:51+00:00","page":"https://rirtracker.com/ip/143.55.192.0-143.55.223.255/#e-8fc47b31afd69a23","report_page":"https://rirtracker.com/arin/reports/2020-06-17/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/143.55.192.0-143.55.223.255.json","explanation":"ARIN's transfer log records a transfer from Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN) on 2020-06-18 01:28 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-June/004205.html","retrieved_at":"2026-10-12T18:40:56+00:00","summary":"ARIN-Issued report for 2020-06-17: \"Add 143.55.192.0-143.55.223.255\""},{"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 2020-06-18 01:28 UTC, Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN); resources moved: 143.55.192.0/19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200616.gz","retrieved_at":"2026-10-12T22:25:47+00:00","summary":"ARIN delegated statistics 2020-06-16 (produced 2020-06-16T14:00:13+00:00), before the report: assigned (dated 1990-08-28)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200618.gz","retrieved_at":"2026-10-12T22:25:51+00:00","summary":"ARIN delegated statistics 2020-06-18 (produced 2020-06-18T14:00:14+00:00), after the report: allocated (dated 2020-06-17)"}]}],"classification_history":{"22bf281529f63465":[{"raw_change_id":567677,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:07+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Intelligent Fiber Network (ARIN) to Zayo Bandwidth (ARIN) on 2023-02-10 15:58 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."}],"8fc47b31afd69a23":[{"raw_change_id":165749,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:48:23+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN) on 2020-06-18 01:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":165749,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:49+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN) on 2020-06-18 01:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":165749,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:34+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN) on 2020-06-18 01:28 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":165749,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:51+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Fashion Institute of Technology (ARIN) to Intelligent Fiber Network (ARIN) on 2020-06-18 01:28 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 2020-06-17)"}}