{"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":"AS55521","resource_type":"asn","page":"https://rirtracker.com/asn/55521/","statistics_now":{"registry":"APNIC","status":"allocated (dated 2010-05-17)"},"current_holder":{"rir":"APNIC","org":null,"how":"APNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"27bc51f430aff6d7","registry":"APNIC","report_date":"2010-05-17","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS55521","start":55521,"end":55521,"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":"2026-10-13T23:56:26+00:00","page":"https://rirtracker.com/asn/55521/#e-27bc51f430aff6d7","report_page":"https://rirtracker.com/apnic/reports/2010-05-17/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/55521.json","observed":"AS55521 not listed on 2010-05-17, allocated on 2010-05-18","explanation":"No transfer record matches. APNIC's statistics show it not listed on 2010-05-17 and allocated (dated 2010-05-17) on 2010-05-18. It wasn't in APNIC's statistics before, so it wasn't APNIC'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.apnic.net/stats/apnic/2010/delegated-apnic-extended-20100518.gz","retrieved_at":"2026-10-12T19:18:40+00:00","summary":"Found by comparing APNIC's daily statistics: AS55521 not listed on 2010-05-17, allocated on 2010-05-18"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20100517.gz","retrieved_at":"2026-10-12T19:18:37+00:00","summary":"APNIC delegated statistics 2010-05-17, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20100518.gz","retrieved_at":"2026-10-12T19:18:40+00:00","summary":"APNIC delegated statistics 2010-05-18, after the change: allocated (dated 2010-05-17)"}]}],"classification_history":{"27bc51f430aff6d7":[{"raw_change_id":228385,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:19:44+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2010-05-17 and allocated (dated 2010-05-17) on 2010-05-18. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":228385,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:09:41+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2010-05-17 and allocated (dated 2010-05-17) on 2010-05-18. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":228385,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:52:45+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2010-05-17 and allocated (dated 2010-05-17) on 2010-05-18. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":228385,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:26+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2010-05-17 and allocated (dated 2010-05-17) on 2010-05-18. It wasn't in APNIC's statistics before, so it wasn't APNIC's unissued inventory; it may have come from another registry in a transfer not yet in the log."}]},"arin_statistics_now":{"status":"not listed"}}