{"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":"171.75.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/171.75.0.0-171.75.255.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 1994-02-25)"},"current_holder":{"rir":"RIPE NCC","org":"LUMEN TECHNOLOGIES UK LIMITED","how":"The RIPE NCC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":101786,"date":"2024-01-29T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Lumen Technologies UK Limited","range":"171.75.0.0/16","log":"RIPE NCC"},{"id":34235,"date":"2024-01-29T14:48:40Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"Level 3 Parent, LLC","recipient_org":"LUMEN TECHNOLOGIES UK LIMITED","range":"171.75.0.0/16","log":"ARIN"},{"id":12161,"date":"2018-02-20T17:35:49Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Level 3 Communications, Inc.","recipient_org":"Level 3 Parent, LLC","range":"171.75.0.0/16","log":"ARIN"}],"events":[{"event_id":"94e1580edf8c7ebe","registry":"ARIN","report_date":"2024-01-29","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"171.75.0.0/16","start":"171.75.0.0","end":"171.75.255.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_organization":"Level 3 Parent, LLC","recipient_organization":"LUMEN TECHNOLOGIES UK LIMITED","inventory_effect":"Transferred out of ARIN administration; not offered to ARIN applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:11:37+00:00","page":"https://rirtracker.com/ip/171.75.0.0-171.75.255.255/#e-94e1580edf8c7ebe","report_page":"https://rirtracker.com/arin/reports/2024-01-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/171.75.0.0-171.75.255.255.json","observed":"171.75.0.0/16 allocated on 2024-01-29, not listed on 2024-01-30","same_transfer_as":"8e6fde309eca4023","explanation":"ARIN's transfer log records a transfer from Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC) on 2024-01-29 14:48 UTC: it left ARIN for the RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240130.gz","retrieved_at":"2026-10-12T23:34:25+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 171.75.0.0/16 allocated on 2024-01-29, not listed on 2024-01-30"},{"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 2024-01-29 14:48 UTC, Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC); resources moved: 171.75.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240128.gz","retrieved_at":"2026-10-12T23:34:20+00:00","summary":"ARIN delegated statistics 2024-01-28 (produced 2024-01-28T14:00:44+00:00), before the report: allocated (dated 1994-02-25)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240130.gz","retrieved_at":"2026-10-12T23:34:25+00:00","summary":"ARIN delegated statistics 2024-01-30 (produced 2024-01-30T14:00:44+00:00), after the report: not listed"}]},{"event_id":"8e6fde309eca4023","registry":"RIPE NCC","report_date":"2024-01-29","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"171.75.0.0/16","start":"171.75.0.0","end":"171.75.255.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into the RIPE NCC","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_organization":null,"recipient_organization":"Lumen Technologies UK Limited","inventory_effect":"Transferred into RIPE NCC administration; not a new issuance","inventory_effect_code":"TRANSFER_IN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:52+00:00","page":"https://rirtracker.com/ip/171.75.0.0-171.75.255.255/#e-8e6fde309eca4023","report_page":"https://rirtracker.com/ripe/reports/2024-01-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/171.75.0.0-171.75.255.255.json","observed":"Transfer: (no name) (ARIN) to Lumen Technologies UK Limited (RIPE NCC)","same_transfer_as":"94e1580edf8c7ebe","explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Lumen Technologies UK Limited (RIPE NCC) on 2024-01-29 19:00 UTC: it came to the RIPE NCC from ARIN. It was already issued by another registry, so this is not a new issuance.","evidence":[{"type":"transfer","url":"https://ftp.ripe.net/pub/stats/ripencc/transfers/transfers_latest.json","retrieved_at":"2026-10-13T21:49:37+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2024-01-29 19:00 UTC, (no name) (ARIN) to Lumen Technologies UK Limited (RIPE NCC); resources moved: 171.75.0.0/16"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240128.bz2","retrieved_at":"2026-10-13T00:22:07+00:00","summary":"RIPE NCC delegated statistics 2024-01-28 (produced 2024-01-28T22:59:59+00:00), before the change: not listed"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240129.bz2","retrieved_at":"2026-10-13T00:22:10+00:00","summary":"RIPE NCC delegated statistics 2024-01-29 (produced 2024-01-29T22:59:59+00:00), after the change: allocated (dated 1994-02-25)"}]},{"event_id":"ef3ba09cf7b0a860","registry":"ARIN","report_date":"2018-02-20","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"171.75.0.0/16","start":"171.75.0.0","end":"171.75.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Level 3 Communications, Inc.","recipient_organization":"Level 3 Parent, LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:33+00:00","page":"https://rirtracker.com/ip/171.75.0.0-171.75.255.255/#e-ef3ba09cf7b0a860","report_page":"https://rirtracker.com/arin/reports/2018-02-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/171.75.0.0-171.75.255.255.json","observed":"Merger/acquisition: Level 3 Communications, Inc. (ARIN) to Level 3 Parent, LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Level 3 Communications, Inc. (ARIN) to Level 3 Parent, LLC (ARIN) on 2018-02-20 17:35 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 2018-02-20 17:35 UTC, Level 3 Communications, Inc. (ARIN) to Level 3 Parent, LLC (ARIN); resources moved: 171.75.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180219.gz","retrieved_at":"2026-10-12T21:42:07+00:00","summary":"ARIN delegated statistics 2018-02-19 (produced 2018-02-19T06:10:25+00:00), before the report: allocated (dated 1994-02-25)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180221.gz","retrieved_at":"2026-10-12T21:42:11+00:00","summary":"ARIN delegated statistics 2018-02-21 (produced 2018-02-21T06:09:03+00:00), after the report: allocated (dated 1994-02-25)"}]}],"classification_history":{"94e1580edf8c7ebe":[{"raw_change_id":461031,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T06:06:07+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC) on 2024-01-29 14:48 UTC: it left ARIN for the RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":461031,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:22:28+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC) on 2024-01-29 14:48 UTC: it left ARIN for the RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":461031,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T15:06:31+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC) on 2024-01-29 14:48 UTC: it left ARIN for the RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":461031,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:11:37+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Level 3 Parent, LLC (ARIN) to LUMEN TECHNOLOGIES UK LIMITED (RIPE NCC) on 2024-01-29 14:48 UTC: it left ARIN for the RIPE NCC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."}],"8e6fde309eca4023":[{"raw_change_id":102338,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:03:42+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Lumen Technologies UK Limited (RIPE NCC) on 2024-01-29 19:00 UTC: it came to the RIPE NCC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":102338,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:04:32+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Lumen Technologies UK Limited (RIPE NCC) on 2024-01-29 19:00 UTC: it came to the RIPE NCC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":102338,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:00+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Lumen Technologies UK Limited (RIPE NCC) on 2024-01-29 19:00 UTC: it came to the RIPE NCC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":102338,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:52+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Lumen Technologies UK Limited (RIPE NCC) on 2024-01-29 19:00 UTC: it came to the RIPE NCC from ARIN. It was already issued by another registry, so this is not a new issuance."}],"ef3ba09cf7b0a860":[{"raw_change_id":553790,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:33+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Level 3 Communications, Inc. (ARIN) to Level 3 Parent, LLC (ARIN) on 2018-02-20 17:35 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."}]},"arin_statistics_now":{"status":"not listed"}}