{"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":"205.153.228.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/205.153.228.0-205.153.229.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2025-07-01)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"3aa69b790e0c7a97","registry":"ARIN","report_date":"2025-07-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add 205.153.228.0-205.153.229.255","resource_type":"ipv4","resource":"205.153.228.0/23","start":"205.153.228.0","end":"205.153.229.255","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":"2026-10-13T23:54:31+00:00","page":"https://rirtracker.com/ip/205.153.228.0-205.153.229.255/#e-3aa69b790e0c7a97","report_page":"https://rirtracker.com/arin/reports/2025-07-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/205.153.228.0-205.153.229.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-06-30 and allocated (dated 2025-07-01) on 2025-07-02. The tracker saw this range removed from registration on 2021-07-05 (205.153.228.0/23), 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-July/006044.html","retrieved_at":"2026-10-12T18:43:05+00:00","summary":"ARIN-Issued report for 2025-07-01: \"Add 205.153.228.0-205.153.229.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250630.gz","retrieved_at":"2026-10-13T00:02:34+00:00","summary":"ARIN delegated statistics 2025-06-30 (produced 2025-06-30T13:01:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250702.gz","retrieved_at":"2026-10-13T00:02:39+00:00","summary":"ARIN delegated statistics 2025-07-02 (produced 2025-07-02T13:01:11+00:00), after the report: allocated (dated 2025-07-01)"}]},{"event_id":"e9d1931e43a47d0d","registry":"ARIN","report_date":"2021-07-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"205.153.228.0/23","start":"205.153.228.0","end":"205.153.229.255","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":"2026-10-14T00:08:18+00:00","page":"https://rirtracker.com/ip/205.153.228.0-205.153.229.255/#e-e9d1931e43a47d0d","report_page":"https://rirtracker.com/arin/reports/2021-07-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/205.153.228.0-205.153.229.255.json","observed":"205.153.228.0/23 assigned on 2021-07-05, reserved on 2021-07-06","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":"2021-09-03","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 1995-06-29) on 2021-07-04 and reserved on 2021-07-06. 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 2021-09-03. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210706.gz","retrieved_at":"2026-10-12T22:45:23+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 205.153.228.0/23 assigned on 2021-07-05, reserved on 2021-07-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210704.gz","retrieved_at":"2026-10-12T22:45:18+00:00","summary":"ARIN delegated statistics 2021-07-04 (produced 2021-07-04T14:00:13+00:00), before the report: assigned (dated 1995-06-29)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210706.gz","retrieved_at":"2026-10-12T22:45:23+00:00","summary":"ARIN delegated statistics 2021-07-06 (produced 2021-07-06T14:00:14+00:00), after the report: reserved"}]}],"classification_history":{"3aa69b790e0c7a97":[{"raw_change_id":194827,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:07:05+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-06-30 and allocated (dated 2025-07-01) on 2025-07-02. The tracker saw this range removed from registration on 2021-07-05 (205.153.228.0/23), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":194827,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:03+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-06-30 and allocated (dated 2025-07-01) on 2025-07-02. The tracker saw this range removed from registration on 2021-07-05 (205.153.228.0/23), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":194827,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:57+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-06-30 and allocated (dated 2025-07-01) on 2025-07-02. The tracker saw this range removed from registration on 2021-07-05 (205.153.228.0/23), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":194827,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:31+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2025-06-30 and allocated (dated 2025-07-01) on 2025-07-02. The tracker saw this range removed from registration on 2021-07-05 (205.153.228.0/23), so it appears to have been issued again from ARIN's pool."}],"e9d1931e43a47d0d":[{"raw_change_id":414166,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:46:10+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 1995-06-29) on 2021-07-04 and reserved on 2021-07-06. 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 2021-09-03. This does not confirm availability."},{"raw_change_id":414166,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:19:44+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 1995-06-29) on 2021-07-04 and reserved on 2021-07-06. 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 2021-09-03. This does not confirm availability."},{"raw_change_id":414166,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:03:36+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 1995-06-29) on 2021-07-04 and reserved on 2021-07-06. 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 2021-09-03. This does not confirm availability."},{"raw_change_id":414166,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:08:18+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 1995-06-29) on 2021-07-04 and reserved on 2021-07-06. 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 2021-09-03. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2025-07-01)"}}