{"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":"151.173.0.0/17","resource_type":"ipv4","page":"https://rirtracker.com/ip/151.173.0.0-151.173.127.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 1991-09-05)"},"current_holder":{"rir":"RIPE NCC","org":"Saudi Telecom Company JSC","how":"The RIPE NCC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":55796,"date":"2017-12-12T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":null,"recipient_org":"Saudi Telecom Company JSC","range":"151.173.0.0/17","log":"RIPE NCC"},{"id":11623,"date":"2017-12-12T16:17:32Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_org":"Arnold & Porter Kaye Scholer LLP","recipient_org":"Saudi Telecom Company JSC","range":"151.173.0.0/17","log":"ARIN"},{"id":9524,"date":"2017-05-19T14:29:48Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Arnold & Porter","recipient_org":"Arnold & Porter Kaye Scholer LLP","range":"151.173.0.0/16","log":"ARIN"}],"events":[{"event_id":"b7339579890767a9","registry":"ARIN","report_date":"2017-12-12","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"151.173.0.0/17","start":"151.173.0.0","end":"151.173.127.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"RIPE NCC","source_organization":"Arnold & Porter Kaye Scholer LLP","recipient_organization":"Saudi Telecom Company JSC","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":"2026-10-14T00:03:45+00:00","page":"https://rirtracker.com/ip/151.173.0.0-151.173.127.255/#e-b7339579890767a9","report_page":"https://rirtracker.com/arin/reports/2017-12-12/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/151.173.0.0-151.173.127.255.json","observed":"151.173.0.0/17 assigned on 2017-12-12, not listed on 2017-12-13","same_transfer_as":"098654e3304ccbe8","explanation":"ARIN's transfer log records a transfer from Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 16:17 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/2017/delegated-arin-extended-20171213.gz","retrieved_at":"2026-10-12T21:38:40+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 151.173.0.0/17 assigned on 2017-12-12, not listed on 2017-12-13"},{"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 2017-12-12 16:17 UTC, Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC); resources moved: 151.173.0.0/17"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171211.gz","retrieved_at":"2026-10-12T21:38:35+00:00","summary":"ARIN delegated statistics 2017-12-11 (produced 2017-12-11T06:07:58+00:00), before the report: assigned (dated 1991-09-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20171213.gz","retrieved_at":"2026-10-12T21:38:40+00:00","summary":"ARIN delegated statistics 2017-12-13 (produced 2017-12-13T06:09:18+00:00), after the report: not listed"}]},{"event_id":"098654e3304ccbe8","registry":"RIPE NCC","report_date":"2017-12-12","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"151.173.0.0/17","start":"151.173.0.0","end":"151.173.127.255","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":"Saudi Telecom Company JSC","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":"2026-10-13T23:47:26+00:00","page":"https://rirtracker.com/ip/151.173.0.0-151.173.127.255/#e-098654e3304ccbe8","report_page":"https://rirtracker.com/ripe/reports/2017-12-12/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/151.173.0.0-151.173.127.255.json","observed":"Transfer: (no name) (ARIN) to Saudi Telecom Company JSC (RIPE NCC)","same_transfer_as":"b7339579890767a9","explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 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 2017-12-12 19:00 UTC, (no name) (ARIN) to Saudi Telecom Company JSC (RIPE NCC); resources moved: 151.173.0.0/17"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2017/delegated-ripencc-extended-20171211.bz2","retrieved_at":"2026-10-12T21:34:09+00:00","summary":"RIPE NCC delegated statistics 2017-12-11 (produced 2017-12-11T22:59:59+00:00), before the change: not listed"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2017/delegated-ripencc-extended-20171212.bz2","retrieved_at":"2026-10-12T21:34:27+00:00","summary":"RIPE NCC delegated statistics 2017-12-12 (produced 2017-12-12T22:59:59+00:00), after the change: allocated (dated 1991-09-05)"}]}],"classification_history":{"b7339579890767a9":[{"raw_change_id":345496,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T05:17:29+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 16:17 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":345496,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:16:00+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 16:17 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":345496,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:59:34+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 16:17 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":345496,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:03:45+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Arnold & Porter Kaye Scholer LLP (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 16:17 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."}],"098654e3304ccbe8":[{"raw_change_id":55008,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:43:47+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 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":55008,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:02:33+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 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":55008,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:47+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 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":55008,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:47:26+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a transfer from an unnamed organization (ARIN) to Saudi Telecom Company JSC (RIPE NCC) on 2017-12-12 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."}]},"arin_statistics_now":{"status":"not listed"}}