{"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":"168.151.27.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/168.151.27.0-168.151.27.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-10-06)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"ae38021de7ccd740","registry":"ARIN","report_date":"2025-10-06","source":"arin_issued","raw_action":"ADD","raw_line":"Add 168.151.27.0-168.151.27.255","resource_type":"ipv4","resource":"168.151.27.0/24","start":"168.151.27.0","end":"168.151.27.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","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":"2026-10-13T23:54:36+00:00","page":"https://rirtracker.com/ip/168.151.27.0-168.151.27.255/#e-ae38021de7ccd740","report_page":"https://rirtracker.com/arin/reports/2025-10-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/168.151.27.0-168.151.27.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. The tracker saw this range removed from registration on 2016-11-08 (168.151.27.0/24), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2025-October/006141.html","retrieved_at":"2026-10-12T18:43:11+00:00","summary":"ARIN-Issued report for 2025-10-06: \"Add 168.151.27.0-168.151.27.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251005.gz","retrieved_at":"2026-10-13T00:08:04+00:00","summary":"ARIN delegated statistics 2025-10-05 (produced 2025-10-05T13:00:49+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251007.gz","retrieved_at":"2026-10-13T00:08:09+00:00","summary":"ARIN delegated statistics 2025-10-07 (produced 2025-10-07T13:00:46+00:00), after the report: allocated (dated 2025-10-06)"}]},{"event_id":"72db271ed0e914d8","registry":"ARIN","report_date":"2025-10-06","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 168.151.27.0-168.151.27.255","resource_type":"ipv4","resource":"168.151.27.0/24","start":"168.151.27.0","end":"168.151.27.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:35+00:00","page":"https://rirtracker.com/ip/168.151.27.0-168.151.27.255/#e-72db271ed0e914d8","report_page":"https://rirtracker.com/arin/reports/2025-10-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/168.151.27.0-168.151.27.255.json","explanation":"ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 168.151.27.0-168.151.27.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2025-October/006141.html","retrieved_at":"2026-10-12T18:43:11+00:00","summary":"ARIN-Issued report for 2025-10-06: \"Remove 168.151.27.0-168.151.27.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251005.gz","retrieved_at":"2026-10-13T00:08:04+00:00","summary":"ARIN delegated statistics 2025-10-05 (produced 2025-10-05T13:00:49+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251007.gz","retrieved_at":"2026-10-13T00:08:09+00:00","summary":"ARIN delegated statistics 2025-10-07 (produced 2025-10-07T13:00:46+00:00), after the report: allocated (dated 2025-10-06)"}]},{"event_id":"e285d99559a19163","registry":"ARIN","report_date":"2016-11-08","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"168.151.27.0/24","start":"168.151.27.0","end":"168.151.27.255","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":"2026-10-14T00:02:29+00:00","page":"https://rirtracker.com/ip/168.151.27.0-168.151.27.255/#e-e285d99559a19163","report_page":"https://rirtracker.com/arin/reports/2016-11-08/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/168.151.27.0-168.151.27.255.json","observed":"168.151.27.0/24 assigned on 2016-11-08, reserved on 2016-11-09","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":"2017-01-07","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 assigned (dated 1994-04-04) on 2016-11-07 and reserved on 2016-11-09. 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 2017-01-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161109.gz","retrieved_at":"2026-10-12T21:19:04+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 168.151.27.0/24 assigned on 2016-11-08, reserved on 2016-11-09"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161107.gz","retrieved_at":"2026-10-12T21:18:58+00:00","summary":"ARIN delegated statistics 2016-11-07 (produced 2016-11-07T06:08:47+00:00), before the report: assigned (dated 1994-04-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161109.gz","retrieved_at":"2026-10-12T21:19:04+00:00","summary":"ARIN delegated statistics 2016-11-09 (produced 2016-11-09T06:09:28+00:00), after the report: reserved"}]},{"event_id":"998677e764af0b3e","registry":"ARIN","report_date":"2013-10-07","source":"arin_issued","raw_action":"ADD","raw_line":"Add 168.151.27.0-168.151.27.255","resource_type":"ipv4","resource":"168.151.27.0/24","start":"168.151.27.0","end":"168.151.27.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:08+00:00","page":"https://rirtracker.com/ip/168.151.27.0-168.151.27.255/#e-998677e764af0b3e","report_page":"https://rirtracker.com/arin/reports/2013-10-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/168.151.27.0-168.151.27.255.json","explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1994-04-04) on 2013-10-06 and assigned (dated 2013-10-07) on 2013-10-08. The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change).","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2013-October/001762.html","retrieved_at":"2026-10-12T18:38:07+00:00","summary":"ARIN-Issued report for 2013-10-07: \"Add 168.151.27.0-168.151.27.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20131006.gz","retrieved_at":"2026-10-12T20:05:44+00:00","summary":"ARIN delegated statistics 2013-10-06 (produced 2013-10-06T05:08:13+00:00), before the report: assigned (dated 1994-04-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20131008.gz","retrieved_at":"2026-10-12T20:05:49+00:00","summary":"ARIN delegated statistics 2013-10-08 (produced 2013-10-08T05:03:56+00:00), after the report: assigned (dated 2013-10-07)"}]}],"classification_history":{"ae38021de7ccd740":[{"raw_change_id":196407,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:08:03+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. The tracker saw this range removed from registration on 2016-11-08 (168.151.27.0/24), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":196407,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:07+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. The tracker saw this range removed from registration on 2016-11-08 (168.151.27.0/24), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":196407,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:01+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. The tracker saw this range removed from registration on 2016-11-08 (168.151.27.0/24), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":196407,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:36+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. The tracker saw this range removed from registration on 2016-11-08 (168.151.27.0/24), so it appears to have been issued again from ARIN's pool."}],"72db271ed0e914d8":[{"raw_change_id":196314,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:07:59+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 168.151.27.0-168.151.27.255. The issuance is explained on that line."},{"raw_change_id":196314,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:06+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 168.151.27.0-168.151.27.255. The issuance is explained on that line."},{"raw_change_id":196314,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:01+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 168.151.27.0-168.151.27.255. The issuance is explained on that line."},{"raw_change_id":196314,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:35+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2025-10-05 and allocated (dated 2025-10-06) on 2025-10-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds 168.151.27.0-168.151.27.255. The issuance is explained on that line."}],"e285d99559a19163":[{"raw_change_id":325532,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:07:22+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 assigned (dated 1994-04-04) on 2016-11-07 and reserved on 2016-11-09. 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 2017-01-07. This does not confirm availability."},{"raw_change_id":325532,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:55+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 assigned (dated 1994-04-04) on 2016-11-07 and reserved on 2016-11-09. 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 2017-01-07. This does not confirm availability."},{"raw_change_id":325532,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:58:24+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 assigned (dated 1994-04-04) on 2016-11-07 and reserved on 2016-11-09. 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 2017-01-07. This does not confirm availability."},{"raw_change_id":325532,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:29+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 assigned (dated 1994-04-04) on 2016-11-07 and reserved on 2016-11-09. 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 2017-01-07. This does not confirm availability."}],"998677e764af0b3e":[{"raw_change_id":130375,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:22:23+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1994-04-04) on 2013-10-06 and assigned (dated 2013-10-07) on 2013-10-08. The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":130375,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:31+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1994-04-04) on 2013-10-06 and assigned (dated 2013-10-07) on 2013-10-08. The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":130375,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:06+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1994-04-04) on 2013-10-06 and assigned (dated 2013-10-07) on 2013-10-08. The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."},{"raw_change_id":130375,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:08+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it assigned (dated 1994-04-04) on 2013-10-06 and assigned (dated 2013-10-07) on 2013-10-08. The registration was replaced with one for a different holder record, and public sources don't say why (a transfer not yet logged, a return and reissue, or an organization record change)."}]},"arin_statistics_now":{"status":"allocated (dated 2025-10-06)"}}