{"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":"53.0.0.0/8","resource_type":"ipv4","page":"https://rirtracker.com/ip/53.0.0.0-53.255.255.255/","statistics_now":{"registry":"RIPE NCC","status":"assigned (dated 1992-03-17)"},"current_holder":{"rir":"RIPE NCC","org":null,"how":"The RIPE NCC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"7f5f71bdba7fb284","registry":"ARIN","report_date":"2014-10-14","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"53.0.0.0/8","start":"53.0.0.0","end":"53.255.255.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"OBSERVED_ONLY","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":"2026-10-14T00:00:08+00:00","page":"https://rirtracker.com/ip/53.0.0.0-53.255.255.255/#e-7f5f71bdba7fb284","report_page":"https://rirtracker.com/arin/reports/2014-10-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/53.0.0.0-53.255.255.255.json","observed":"53.0.0.0/8 assigned on 2014-10-14, not listed on 2014-10-15","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":"2014-12-13","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 1992-03-17) on 2014-10-13 and not listed on 2014-10-15. Being gone from ARIN's statistics entirely can also mean it moved to another registry. 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 2014-12-13. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141015.gz","retrieved_at":"2026-10-12T20:42:29+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 53.0.0.0/8 assigned on 2014-10-14, not listed on 2014-10-15"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141013.gz","retrieved_at":"2026-10-12T20:42:24+00:00","summary":"ARIN delegated statistics 2014-10-13 (produced 2014-10-13T05:03:47+00:00), before the report: assigned (dated 1992-03-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2014/delegated-arin-extended-20141015.gz","retrieved_at":"2026-10-12T20:42:29+00:00","summary":"ARIN delegated statistics 2014-10-15 (produced 2014-10-15T05:03:54+00:00), after the report: not listed"}]},{"event_id":"746cfeb6bda097c6","registry":"RIPE NCC","report_date":"2014-10-14","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"53.0.0.0/8","start":"53.0.0.0","end":"53.255.255.255","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":"2026-10-13T23:58:46+00:00","page":"https://rirtracker.com/ip/53.0.0.0-53.255.255.255/#e-746cfeb6bda097c6","report_page":"https://rirtracker.com/ripe/reports/2014-10-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/53.0.0.0-53.255.255.255.json","observed":"53.0.0.0/8 not listed on 2014-10-13, assigned on 2014-10-14","explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2014-10-13 and assigned (dated 1992-03-17) on 2014-10-14. It wasn't in the RIPE NCC's statistics before, so it wasn't the RIPE NCC's unissued inventory; it may have come from another registry in a transfer not yet in the log.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2014/delegated-ripencc-extended-20141014.bz2","retrieved_at":"2026-10-12T20:09:26+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 53.0.0.0/8 not listed on 2014-10-13, assigned on 2014-10-14"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2014/delegated-ripencc-extended-20141013.bz2","retrieved_at":"2026-10-12T20:09:23+00:00","summary":"RIPE NCC delegated statistics 2014-10-13 (produced 2014-10-13T21:59:59+00:00), before the change: not listed"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2014/delegated-ripencc-extended-20141014.bz2","retrieved_at":"2026-10-12T20:09:26+00:00","summary":"RIPE NCC delegated statistics 2014-10-14 (produced 2014-10-14T21:59:59+00:00), after the change: assigned (dated 1992-03-17)"}]}],"classification_history":{"7f5f71bdba7fb284":[{"raw_change_id":290425,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:51:50+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 1992-03-17) on 2014-10-13 and not listed on 2014-10-15. Being gone from ARIN's statistics entirely can also mean it moved to another registry. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290425,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:55+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 1992-03-17) on 2014-10-13 and not listed on 2014-10-15. Being gone from ARIN's statistics entirely can also mean it moved to another registry. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290425,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:15+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 1992-03-17) on 2014-10-13 and not listed on 2014-10-15. Being gone from ARIN's statistics entirely can also mean it moved to another registry. 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 2014-12-13. This does not confirm availability."},{"raw_change_id":290425,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:08+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 1992-03-17) on 2014-10-13 and not listed on 2014-10-15. Being gone from ARIN's statistics entirely can also mean it moved to another registry. 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 2014-12-13. This does not confirm availability."}],"746cfeb6bda097c6":[{"raw_change_id":268633,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:40:12+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2014-10-13 and assigned (dated 1992-03-17) on 2014-10-14. It wasn't in the RIPE NCC's statistics before, so it wasn't the RIPE NCC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":268633,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:44+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2014-10-13 and assigned (dated 1992-03-17) on 2014-10-14. It wasn't in the RIPE NCC's statistics before, so it wasn't the RIPE NCC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":268633,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:59+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2014-10-13 and assigned (dated 1992-03-17) on 2014-10-14. It wasn't in the RIPE NCC's statistics before, so it wasn't the RIPE NCC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":268633,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:46+00:00","current":1,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2014-10-13 and assigned (dated 1992-03-17) on 2014-10-14. It wasn't in the RIPE NCC's statistics before, so it wasn't the RIPE NCC's unissued inventory; it may have come from another registry in a transfer not yet in the log."}]},"arin_statistics_now":{"status":"not listed"}}