{"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":"193.138.152.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/193.138.152.0-193.138.155.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 2010-11-12)"},"current_holder":{"rir":"RIPE NCC","org":"ISP Alliance a.s.","how":"The RIPE NCC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":99483,"date":"2023-11-07T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Ladislav Rudolf","recipient_org":"ISP Alliance a.s.","range":"193.138.152.0/22","log":"RIPE NCC"}],"events":[{"event_id":"8c9da171f354b126","registry":"RIPE NCC","report_date":"2023-11-07","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"193.138.152.0/22","start":"193.138.152.0","end":"193.138.155.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-RIPE NCC transfer","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_organization":"Ladislav Rudolf","recipient_organization":"ISP Alliance a.s.","inventory_effect":"No effect on RIPE NCC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:44+00:00","page":"https://rirtracker.com/ip/193.138.152.0-193.138.155.255/#e-8c9da171f354b126","report_page":"https://rirtracker.com/ripe/reports/2023-11-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/193.138.152.0-193.138.155.255.json","observed":"Transfer: Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC)","explanation":"The RIPE NCC's transfer log records a transfer from Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC) on 2023-11-07 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC.","evidence":[{"type":"transfer","url":"https://ftp.ripe.net/pub/stats/ripencc/transfers/transfers_latest.json","retrieved_at":"2026-10-13T21:49:37+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2023-11-07 19:00 UTC, Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC); resources moved: 193.138.152.0/22"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2023/delegated-ripencc-extended-20231106.bz2","retrieved_at":"2026-10-13T00:15:44+00:00","summary":"RIPE NCC delegated statistics 2023-11-06 (produced 2023-11-06T22:59:59+00:00), before the change: assigned (dated 2010-11-12)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2023/delegated-ripencc-extended-20231107.bz2","retrieved_at":"2026-10-13T00:16:07+00:00","summary":"RIPE NCC delegated statistics 2023-11-07 (produced 2023-11-07T22:59:59+00:00), after the change: assigned (dated 2010-11-12)"}]},{"event_id":"6c51f930cdb8aac2","registry":"RIPE NCC","report_date":"2010-11-13","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"193.138.152.0/22","start":"193.138.152.0","end":"193.138.155.255","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 RIPE NCC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:56+00:00","page":"https://rirtracker.com/ip/193.138.152.0-193.138.155.255/#e-6c51f930cdb8aac2","report_page":"https://rirtracker.com/ripe/reports/2010-11-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/193.138.152.0-193.138.155.255.json","observed":"193.138.152.0/22 available on 2010-11-12, assigned on 2010-11-13","explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2010-11-12 and assigned (dated 2010-11-12) on 2010-11-13. The tracker saw this range removed from registration on 2010-05-04 (193.138.152.0/22), so it appears to have been issued again from the RIPE NCC's pool.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20101113.bz2","retrieved_at":"2026-10-12T18:47:24+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 193.138.152.0/22 available on 2010-11-12, assigned on 2010-11-13"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20101112.bz2","retrieved_at":"2026-10-12T18:47:22+00:00","summary":"RIPE NCC delegated statistics 2010-11-12, before the change: available"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20101113.bz2","retrieved_at":"2026-10-12T18:47:24+00:00","summary":"RIPE NCC delegated statistics 2010-11-13, after the change: assigned (dated 2010-11-12)"}]},{"event_id":"97bf0fddfe2b4f9b","registry":"RIPE NCC","report_date":"2010-05-04","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"193.138.152.0/22","start":"193.138.152.0","end":"193.138.155.255","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":"2026-10-13T23:50:53+00:00","page":"https://rirtracker.com/ip/193.138.152.0-193.138.155.255/#e-97bf0fddfe2b4f9b","report_page":"https://rirtracker.com/ripe/reports/2010-05-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/193.138.152.0-193.138.155.255.json","observed":"193.138.152.0/22 assigned on 2010-05-03, available on 2010-05-04","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 2004-11-18) on 2010-05-03 and available on 2010-05-04. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100504.bz2","retrieved_at":"2026-10-12T18:36:41+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 193.138.152.0/22 assigned on 2010-05-03, available on 2010-05-04"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100503.bz2","retrieved_at":"2026-10-12T18:36:39+00:00","summary":"RIPE NCC delegated statistics 2010-05-03, before the change: assigned (dated 2004-11-18)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100504.bz2","retrieved_at":"2026-10-12T18:36:41+00:00","summary":"RIPE NCC delegated statistics 2010-05-04, after the change: available"}]}],"classification_history":{"8c9da171f354b126":[{"raw_change_id":100008,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:02:40+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC) on 2023-11-07 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":100008,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:04:26+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC) on 2023-11-07 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":100008,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:46:54+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC) on 2023-11-07 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":100008,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:44+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a transfer from Ladislav Rudolf (RIPE NCC) to ISP Alliance a.s. (RIPE NCC) on 2023-11-07 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."}],"6c51f930cdb8aac2":[{"raw_change_id":202642,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:10:12+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2010-11-12 and assigned (dated 2010-11-12) on 2010-11-13. The tracker saw this range removed from registration on 2010-05-04 (193.138.152.0/22), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":202642,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:23+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2010-11-12 and assigned (dated 2010-11-12) on 2010-11-13. The tracker saw this range removed from registration on 2010-05-04 (193.138.152.0/22), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":202642,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:20+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2010-11-12 and assigned (dated 2010-11-12) on 2010-11-13. The tracker saw this range removed from registration on 2010-05-04 (193.138.152.0/22), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":202642,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:56+00:00","current":1,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2010-11-12 and assigned (dated 2010-11-12) on 2010-11-13. The tracker saw this range removed from registration on 2010-05-04 (193.138.152.0/22), so it appears to have been issued again from the RIPE NCC's pool."}],"97bf0fddfe2b4f9b":[{"raw_change_id":123343,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:13:51+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 2004-11-18) on 2010-05-03 and available on 2010-05-04. 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 2010-10-31. This does not confirm availability."},{"raw_change_id":123343,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:19+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 2004-11-18) on 2010-05-03 and available on 2010-05-04. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":123343,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:53+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 2004-11-18) on 2010-05-03 and available on 2010-05-04. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":123343,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:53+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 2004-11-18) on 2010-05-03 and available on 2010-05-04. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}