{"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":"23.151.168.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/23.151.168.0-23.151.168.255/","statistics_now":{"registry":"ARIN","status":"reserved"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"a173d55de7f347e9","registry":"ARIN","report_date":"2023-10-27","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"23.151.168.0/24","start":"23.151.168.0","end":"23.151.168.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:11:15+00:00","page":"https://rirtracker.com/ip/23.151.168.0-23.151.168.255/#e-a173d55de7f347e9","report_page":"https://rirtracker.com/arin/reports/2023-10-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/23.151.168.0-23.151.168.255.json","observed":"23.151.168.0/24 allocated on 2023-10-27, reserved on 2023-10-28","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_days":60,"estimated_hold_end":"2023-12-26","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2023-04-24) on 2023-10-26 and reserved on 2023-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2023-12-26. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231028.gz","retrieved_at":"2026-10-12T23:29:21+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 23.151.168.0/24 allocated on 2023-10-27, reserved on 2023-10-28"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231026.gz","retrieved_at":"2026-10-12T23:29:16+00:00","summary":"ARIN delegated statistics 2023-10-26 (produced 2023-10-26T13:00:34+00:00), before the report: allocated (dated 2023-04-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231028.gz","retrieved_at":"2026-10-12T23:29:21+00:00","summary":"ARIN delegated statistics 2023-10-28 (produced 2023-10-28T13:00:33+00:00), after the report: reserved"}]},{"event_id":"04a5cf6958f846f1","registry":"ARIN","report_date":"2023-04-24","source":"arin_issued","raw_action":"ADD","raw_line":"Add 23.151.168.0-23.151.168.255","resource_type":"ipv4","resource":"23.151.168.0/24","start":"23.151.168.0","end":"23.151.168.255","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":"2026-10-13T23:53:41+00:00","page":"https://rirtracker.com/ip/23.151.168.0-23.151.168.255/#e-04a5cf6958f846f1","report_page":"https://rirtracker.com/arin/reports/2023-04-24/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/23.151.168.0-23.151.168.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2023-04-23 and allocated (dated 2023-04-24) on 2023-04-25. 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/2023-April/005246.html","retrieved_at":"2026-10-12T18:42:08+00:00","summary":"ARIN-Issued report for 2023-04-24: \"Add 23.151.168.0-23.151.168.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230423.gz","retrieved_at":"2026-10-12T23:19:31+00:00","summary":"ARIN delegated statistics 2023-04-23 (produced 2023-04-23T13:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230425.gz","retrieved_at":"2026-10-12T23:19:36+00:00","summary":"ARIN delegated statistics 2023-04-25 (produced 2023-04-25T13:00:11+00:00), after the report: allocated (dated 2023-04-24)"}]}],"classification_history":{"a173d55de7f347e9":[{"raw_change_id":456296,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:04:02+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2023-04-24) on 2023-10-26 and reserved on 2023-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2023-12-26. This does not confirm availability."},{"raw_change_id":456296,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:22:11+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2023-04-24) on 2023-10-26 and reserved on 2023-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2023-12-26. This does not confirm availability."},{"raw_change_id":456296,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:06:13+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2023-04-24) on 2023-10-26 and reserved on 2023-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2023-12-26. This does not confirm availability."},{"raw_change_id":456296,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:11:15+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2023-04-24) on 2023-10-26 and reserved on 2023-10-28. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2023-12-26. This does not confirm availability."}],"04a5cf6958f846f1":[{"raw_change_id":181328,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:58:57+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2023-04-23 and allocated (dated 2023-04-24) on 2023-04-25. The tracker saw this range released from hold on 2013-03-26 (23.128.0.0-23.191.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":181328,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:26+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2023-04-23 and allocated (dated 2023-04-24) on 2023-04-25. The tracker saw this range released from hold on 2013-03-26 (23.128.0.0-23.191.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":181328,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:16+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2023-04-23 and allocated (dated 2023-04-24) on 2023-04-25. The tracker saw this range released from hold on 2013-03-26 (23.128.0.0-23.191.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":181328,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:41+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2023-04-23 and allocated (dated 2023-04-24) on 2023-04-25. 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":"reserved"}}