{"classifier_version":"1.0.0","generated":"2026-10-09T21:19:22+00:00","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by the American Registry for Internet Numbers (ARIN), the Number Resource Organization (NRO), or any 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":"155.103.248.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/155.103.248.0-155.103.248.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"reserved"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"2e15b3f9ed5d7434","report_date":"2026-09-07","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"155.103.248.0/24","start":"155.103.248.0","end":"155.103.248.255","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":"1.0.0","classified_at":"2026-10-09T19:28:31+00:00","page":"https://rirtracker.com/ip/155.103.248.0-155.103.248.255/#e-2e15b3f9ed5d7434","evidence_url":"https://rirtracker.com/api/v1/events/2e15b3f9ed5d7434.json","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":"2026-11-06","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 2026-04-02) on 2026-09-06 and reserved on 2026-09-08. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-11-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260908","retrieved_at":"2026-10-09T19:07:19+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 155.103.248.0/24 allocated on 2026-09-07, reserved on 2026-09-08"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260906","retrieved_at":"2026-10-09T19:24:24+00:00","summary":"ARIN delegated statistics 2026-09-06 (produced 2026-09-06T13:00:20+00:00), before the report: allocated (dated 2026-04-02)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260908","retrieved_at":"2026-10-09T19:07:19+00:00","summary":"ARIN delegated statistics 2026-09-08 (produced 2026-09-08T13:00:21+00:00), after the report: reserved"}]},{"event_id":"c49f9363b296abb0","report_date":"2026-04-02","source":"arin_issued","raw_action":"ADD","raw_line":"Add 155.103.248.0-155.103.248.255","resource_type":"ipv4","resource":"155.103.248.0/24","start":"155.103.248.0","end":"155.103.248.255","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":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","page":"https://rirtracker.com/ip/155.103.248.0-155.103.248.255/#e-c49f9363b296abb0","evidence_url":"https://rirtracker.com/api/v1/events/c49f9363b296abb0.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-04-01 and allocated (dated 2026-04-02) on 2026-04-03. The tracker saw this range released from hold on 2026-01-13 (155.103.0.0-155.103.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-April/006320.html","retrieved_at":"2026-10-09T18:53:59+00:00","summary":"ARIN-Issued report for 2026-04-02: \"Add 155.103.248.0-155.103.248.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260401","retrieved_at":"2026-10-09T18:59:10+00:00","summary":"ARIN delegated statistics 2026-04-01 (produced 2026-04-01T13:00:38+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260403","retrieved_at":"2026-10-09T18:59:17+00:00","summary":"ARIN delegated statistics 2026-04-03 (produced 2026-04-03T13:00:39+00:00), after the report: allocated (dated 2026-04-02)"}]},{"event_id":"a2dfa6076c4ed900","report_date":"2026-04-02","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 155.103.248.0-155.103.248.255","resource_type":"ipv4","resource":"155.103.248.0/24","start":"155.103.248.0","end":"155.103.248.255","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":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","page":"https://rirtracker.com/ip/155.103.248.0-155.103.248.255/#e-a2dfa6076c4ed900","evidence_url":"https://rirtracker.com/api/v1/events/a2dfa6076c4ed900.json","explanation":"ARIN's statistics show it reserved on 2026-04-01 and allocated (dated 2026-04-02) on 2026-04-03. ARIN removed its own pool record for this range as part of issuing it: the same report adds 155.103.248.0-155.103.248.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-April/006320.html","retrieved_at":"2026-10-09T18:53:59+00:00","summary":"ARIN-Issued report for 2026-04-02: \"Remove 155.103.248.0-155.103.248.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260401","retrieved_at":"2026-10-09T18:59:10+00:00","summary":"ARIN delegated statistics 2026-04-01 (produced 2026-04-01T13:00:38+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260403","retrieved_at":"2026-10-09T18:59:17+00:00","summary":"ARIN delegated statistics 2026-04-03 (produced 2026-04-03T13:00:39+00:00), after the report: allocated (dated 2026-04-02)"}]}],"classification_history":{"2e15b3f9ed5d7434":[{"raw_change_id":7569,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:31+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 2026-04-02) on 2026-09-06 and reserved on 2026-09-08. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-11-06. This does not confirm availability."}],"c49f9363b296abb0":[{"raw_change_id":1517,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-04-01 and allocated (dated 2026-04-02) on 2026-04-03. The tracker saw this range released from hold on 2026-01-13 (155.103.0.0-155.103.255.255), so it appears to have been issued again from ARIN's pool."}],"a2dfa6076c4ed900":[{"raw_change_id":1448,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:19+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2026-04-01 and allocated (dated 2026-04-02) on 2026-04-03. ARIN removed its own pool record for this range as part of issuing it: the same report adds 155.103.248.0-155.103.248.255. The issuance is explained on that line."}]}}