{"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":"155.45.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/155.45.0.0-155.45.255.255/","statistics_now":{"registry":"RIPE NCC","status":"assigned (dated 2010-10-14)"},"current_holder":{"rir":"RIPE NCC","org":null,"how":"The RIPE NCC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"f9b4a3c03f89cf37","registry":"RIPE NCC","report_date":"2010-10-15","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"155.45.0.0/16","start":"155.45.0.0","end":"155.45.255.255","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":"2026-10-13T23:54:50+00:00","page":"https://rirtracker.com/ip/155.45.0.0-155.45.255.255/#e-f9b4a3c03f89cf37","report_page":"https://rirtracker.com/ripe/reports/2010-10-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/155.45.0.0-155.45.255.255.json","observed":"155.45.0.0/16 not listed on 2010-10-14, assigned on 2010-10-15","explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2010-10-14 and assigned (dated 2010-10-14) on 2010-10-16. 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/2010/delegated-ripencc-extended-20101015.bz2","retrieved_at":"2026-10-12T18:45:53+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 155.45.0.0/16 not listed on 2010-10-14, assigned on 2010-10-15"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20101014.bz2","retrieved_at":"2026-10-12T18:45:51+00:00","summary":"RIPE NCC delegated statistics 2010-10-14, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20101016.bz2","retrieved_at":"2026-10-12T18:45:56+00:00","summary":"RIPE NCC delegated statistics 2010-10-16, after the change: assigned (dated 2010-10-14)"}]},{"event_id":"d59eb10633f91bda","registry":"ARIN","report_date":"2010-10-13","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"155.45.0.0/16","start":"155.45.0.0","end":"155.45.255.255","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":"2026-10-13T23:56:03+00:00","page":"https://rirtracker.com/ip/155.45.0.0-155.45.255.255/#e-d59eb10633f91bda","report_page":"https://rirtracker.com/arin/reports/2010-10-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/155.45.0.0-155.45.255.255.json","observed":"155.45.0.0/16 assigned on 2010-10-13, not listed on 2010-10-14","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":"2010-12-12","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 1995-03-28) on 2010-10-12 and not issued on 2010-10-14. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-12-12. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101014.gz","retrieved_at":"2026-10-12T19:11:30+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 155.45.0.0/16 assigned on 2010-10-13, not listed on 2010-10-14"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101012.gz","retrieved_at":"2026-10-12T19:11:25+00:00","summary":"ARIN delegated statistics 2010-10-12, before the report: assigned (dated 1995-03-28)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101014.gz","retrieved_at":"2026-10-12T19:11:30+00:00","summary":"ARIN delegated statistics 2010-10-14, after the report: not issued"}]}],"classification_history":{"f9b4a3c03f89cf37":[{"raw_change_id":200888,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:09:47+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2010-10-14 and assigned (dated 2010-10-14) on 2010-10-16. 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":200888,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:19+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2010-10-14 and assigned (dated 2010-10-14) on 2010-10-16. 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":200888,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:14+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2010-10-14 and assigned (dated 2010-10-14) on 2010-10-16. 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":200888,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:50+00:00","current":1,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it not listed on 2010-10-14 and assigned (dated 2010-10-14) on 2010-10-16. 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."}],"d59eb10633f91bda":[{"raw_change_id":222043,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:17:25+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 1995-03-28) on 2010-10-12 and not issued on 2010-10-14. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-12-12. This does not confirm availability."},{"raw_change_id":222043,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:09:21+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 1995-03-28) on 2010-10-12 and not issued on 2010-10-14. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-12-12. This does not confirm availability."},{"raw_change_id":222043,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:52:23+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 1995-03-28) on 2010-10-12 and not issued on 2010-10-14. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-12-12. This does not confirm availability."},{"raw_change_id":222043,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:03+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 1995-03-28) on 2010-10-12 and not issued on 2010-10-14. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-12-12. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}