{"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":"194.4.171.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/194.4.171.0-194.4.171.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 2018-09-18)"},"current_holder":{"rir":"RIPE NCC","org":null,"how":"The RIPE NCC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"19ba1e2bec796882","registry":"RIPE NCC","report_date":"2015-06-22","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"194.4.171.0/24","start":"194.4.171.0","end":"194.4.171.255","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":"2026-10-13T23:59:46+00:00","page":"https://rirtracker.com/ip/194.4.171.0-194.4.171.255/#e-19ba1e2bec796882","report_page":"https://rirtracker.com/ripe/reports/2015-06-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/194.4.171.0-194.4.171.255.json","observed":"194.4.171.0/24 assigned on 2015-06-21, reserved on 2015-06-22","hold":{"hold_rule_source_url":"https://www.ripe.net/manage-ips-and-asns/resource-management/quarantine-for-returned-internet-number-resources","hold_rule_days":180,"estimated_hold_end":"2015-12-19","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1994-01-14) on 2015-06-21 and reserved on 2015-06-22. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the estimated hold end is 2015-12-19. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2015/delegated-ripencc-extended-20150622.bz2","retrieved_at":"2026-10-12T20:35:16+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 194.4.171.0/24 assigned on 2015-06-21, reserved on 2015-06-22"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2015/delegated-ripencc-extended-20150621.bz2","retrieved_at":"2026-10-12T20:35:13+00:00","summary":"RIPE NCC delegated statistics 2015-06-21 (produced 2015-06-21T21:59:59+00:00), before the change: assigned (dated 1994-01-14)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2015/delegated-ripencc-extended-20150622.bz2","retrieved_at":"2026-10-12T20:35:16+00:00","summary":"RIPE NCC delegated statistics 2015-06-22 (produced 2015-06-22T21:59:59+00:00), after the change: reserved"}]}],"classification_history":{"19ba1e2bec796882":[{"raw_change_id":284729,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:49:01+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1994-01-14) on 2015-06-21 and reserved on 2015-06-22. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the earliest estimated hold expiration is 2015-12-19. This does not confirm availability."},{"raw_change_id":284729,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:36+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1994-01-14) on 2015-06-21 and reserved on 2015-06-22. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the earliest estimated hold expiration is 2015-12-19. This does not confirm availability."},{"raw_change_id":284729,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:55:55+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1994-01-14) on 2015-06-21 and reserved on 2015-06-22. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the earliest estimated hold expiration is 2015-12-19. This does not confirm availability."},{"raw_change_id":284729,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:59:46+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 1994-01-14) on 2015-06-21 and reserved on 2015-06-22. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the estimated hold end is 2015-12-19. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}