{"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":"AS18155","resource_type":"asn","page":"https://rirtracker.com/asn/18155/","statistics_now":{"registry":"APNIC","status":"allocated (dated 2021-09-21)"},"current_holder":{"rir":"APNIC","org":null,"how":"APNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"8105c4d761a33d4d","registry":"APNIC","report_date":"2021-09-21","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS18155","start":18155,"end":18155,"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 APNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:12:52+00:00","page":"https://rirtracker.com/asn/18155/#e-8105c4d761a33d4d","report_page":"https://rirtracker.com/apnic/reports/2021-09-21/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/18155.json","observed":"AS18155 available on 2021-09-21, allocated on 2021-09-22","explanation":"No transfer record matches. APNIC's statistics show it available on 2021-09-21 and allocated (dated 2021-09-21) on 2021-09-22. The tracker saw this range removed from registration on 2020-09-14 (AS18155), so it appears to have been issued again from APNIC's pool.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2021/delegated-apnic-extended-20210922.gz","retrieved_at":"2026-10-12T23:54:04+00:00","summary":"Found by comparing APNIC's daily statistics: AS18155 available on 2021-09-21, allocated on 2021-09-22"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2021/delegated-apnic-extended-20210921.gz","retrieved_at":"2026-10-12T23:54:00+00:00","summary":"APNIC delegated statistics 2021-09-21, before the change: available"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2021/delegated-apnic-extended-20210922.gz","retrieved_at":"2026-10-12T23:54:04+00:00","summary":"APNIC delegated statistics 2021-09-22, after the change: allocated (dated 2021-09-21)"}]},{"event_id":"79d4c9c82b67bccf","registry":"APNIC","report_date":"2020-09-14","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"asn","resource":"AS18155","start":18155,"end":18155,"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":"2026-10-14T00:11:10+00:00","page":"https://rirtracker.com/asn/18155/#e-79d4c9c82b67bccf","report_page":"https://rirtracker.com/apnic/reports/2020-09-14/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/18155.json","observed":"AS18155 allocated on 2020-09-14, available on 2020-09-15","hold":{"hold_rule_source_url":"https://www.apnic.net/manage-ip/manage-resources/address-status","hold_rule_months":12,"estimated_hold_end":"2021-09-14","availability_statement":"Possible reissue candidate after this date; not confirmed available","hold_rule_observed":true},"explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2017-03-22) on 2020-09-14 and available on 2020-09-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned ASNs a year after the removal or later since 2014, so the tracker estimates the hold ends on 2021-09-14. That is what APNIC has done, not a rule it states. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200915.gz","retrieved_at":"2026-10-12T23:27:34+00:00","summary":"Found by comparing APNIC's daily statistics: AS18155 allocated on 2020-09-14, available on 2020-09-15"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200914.gz","retrieved_at":"2026-10-12T23:27:31+00:00","summary":"APNIC delegated statistics 2020-09-14, before the change: allocated (dated 2017-03-22)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200915.gz","retrieved_at":"2026-10-12T23:27:34+00:00","summary":"APNIC delegated statistics 2020-09-15, after the change: available"}]},{"event_id":"ef5d7d6e4c036051","registry":"APNIC","report_date":"2017-03-22","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS18155","start":18155,"end":18155,"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 APNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:14+00:00","page":"https://rirtracker.com/asn/18155/#e-ef5d7d6e4c036051","report_page":"https://rirtracker.com/apnic/reports/2017-03-22/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/18155.json","observed":"AS18155 available on 2017-03-22, allocated on 2017-03-23","explanation":"No transfer record matches. APNIC's statistics show it available on 2017-03-22 and allocated (dated 2017-03-22) on 2017-03-23. The tracker saw this range removed from registration on 2010-11-11 (AS18155), so it appears to have been issued again from APNIC's pool.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2017/delegated-apnic-extended-20170323.gz","retrieved_at":"2026-10-12T21:59:42+00:00","summary":"Found by comparing APNIC's daily statistics: AS18155 available on 2017-03-22, allocated on 2017-03-23"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2017/delegated-apnic-extended-20170322.gz","retrieved_at":"2026-10-12T21:59:38+00:00","summary":"APNIC delegated statistics 2017-03-22, before the change: available"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2017/delegated-apnic-extended-20170323.gz","retrieved_at":"2026-10-12T21:59:42+00:00","summary":"APNIC delegated statistics 2017-03-23, after the change: allocated (dated 2017-03-22)"}]},{"event_id":"ff7e7bbef2a58475","registry":"APNIC","report_date":"2010-11-11","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"asn","resource":"AS18155","start":18155,"end":18155,"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":"2026-10-13T23:56:50+00:00","page":"https://rirtracker.com/asn/18155/#e-ff7e7bbef2a58475","report_page":"https://rirtracker.com/apnic/reports/2010-11-11/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/18155.json","observed":"AS18155 allocated on 2010-11-11, not listed on 2010-11-12","explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-09-03) on 2010-11-11 and not listed on 2010-11-12. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, and its statistics show a steady one (a year) only for removals from 2014-07-01 on; this one came earlier, so the tracker gives no estimate. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101112.gz","retrieved_at":"2026-10-12T19:27:51+00:00","summary":"Found by comparing APNIC's daily statistics: AS18155 allocated on 2010-11-11, not listed on 2010-11-12"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101111.gz","retrieved_at":"2026-10-12T19:27:48+00:00","summary":"APNIC delegated statistics 2010-11-11, before the change: allocated (dated 2009-09-03)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101112.gz","retrieved_at":"2026-10-12T19:27:51+00:00","summary":"APNIC delegated statistics 2010-11-12, after the change: not listed"}]},{"event_id":"aa2f61d66ac71edc","registry":"APNIC","report_date":"2009-09-03","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"asn","resource":"AS18155","start":18155,"end":18155,"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":"2026-10-13T23:55:47+00:00","page":"https://rirtracker.com/asn/18155/#e-aa2f61d66ac71edc","report_page":"https://rirtracker.com/apnic/reports/2009-09-03/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/18155.json","observed":"AS18155 not listed on 2009-09-03, allocated on 2009-09-04","explanation":"No transfer record matches. APNIC's statistics show it not listed on 2009-09-03 and allocated (dated 2009-09-03) on 2009-09-04. 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/2009/delegated-apnic-extended-20090904.gz","retrieved_at":"2026-10-12T19:05:35+00:00","summary":"Found by comparing APNIC's daily statistics: AS18155 not listed on 2009-09-03, allocated on 2009-09-04"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2009/delegated-apnic-extended-20090903.gz","retrieved_at":"2026-10-12T19:05:32+00:00","summary":"APNIC delegated statistics 2009-09-03, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2009/delegated-apnic-extended-20090904.gz","retrieved_at":"2026-10-12T19:05:35+00:00","summary":"APNIC delegated statistics 2009-09-04, after the change: allocated (dated 2009-09-03)"}]}],"classification_history":{"8105c4d761a33d4d":[{"raw_change_id":475347,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:11:59+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2021-09-21 and allocated (dated 2021-09-21) on 2021-09-22. The tracker saw this range removed from registration on 2020-09-14 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":475347,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:23:26+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2021-09-21 and allocated (dated 2021-09-21) on 2021-09-22. The tracker saw this range removed from registration on 2020-09-14 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":475347,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:07:33+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2021-09-21 and allocated (dated 2021-09-21) on 2021-09-22. The tracker saw this range removed from registration on 2020-09-14 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":475347,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:12:52+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2021-09-21 and allocated (dated 2021-09-21) on 2021-09-22. The tracker saw this range removed from registration on 2020-09-14 (AS18155), so it appears to have been issued again from APNIC's pool."}],"79d4c9c82b67bccf":[{"raw_change_id":455156,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:03:33+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2017-03-22) on 2020-09-14 and available on 2020-09-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":455156,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:22:07+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2017-03-22) on 2020-09-14 and available on 2020-09-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":455156,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:06:08+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2017-03-22) on 2020-09-14 and available on 2020-09-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":455156,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:11:10+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2017-03-22) on 2020-09-14 and available on 2020-09-15. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned ASNs a year after the removal or later since 2014, so the tracker estimates the hold ends on 2021-09-14. That is what APNIC has done, not a rule it states. This does not confirm availability."}],"ef5d7d6e4c036051":[{"raw_change_id":368573,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:27:57+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2017-03-22 and allocated (dated 2017-03-22) on 2017-03-23. The tracker saw this range removed from registration on 2010-11-11 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":368573,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:13+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2017-03-22 and allocated (dated 2017-03-22) on 2017-03-23. The tracker saw this range removed from registration on 2010-11-11 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":368573,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:00:52+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2017-03-22 and allocated (dated 2017-03-22) on 2017-03-23. The tracker saw this range removed from registration on 2010-11-11 (AS18155), so it appears to have been issued again from APNIC's pool."},{"raw_change_id":368573,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:14+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2017-03-22 and allocated (dated 2017-03-22) on 2017-03-23. The tracker saw this range removed from registration on 2010-11-11 (AS18155), so it appears to have been issued again from APNIC's pool."}],"ff7e7bbef2a58475":[{"raw_change_id":235179,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:22:29+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-09-03) on 2010-11-11 and not listed on 2010-11-12. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":235179,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:10:02+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-09-03) on 2010-11-11 and not listed on 2010-11-12. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":235179,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:53:07+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-09-03) on 2010-11-11 and not listed on 2010-11-12. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned ASNs before reissuing them, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":235179,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:50+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-09-03) on 2010-11-11 and not listed on 2010-11-12. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, and its statistics show a steady one (a year) only for removals from 2014-07-01 on; this one came earlier, so the tracker gives no estimate. This does not confirm availability."}],"aa2f61d66ac71edc":[{"raw_change_id":217648,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:15:39+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2009-09-03 and allocated (dated 2009-09-03) on 2009-09-04. 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":217648,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:09:08+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2009-09-03 and allocated (dated 2009-09-03) on 2009-09-04. 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":217648,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:52:08+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2009-09-03 and allocated (dated 2009-09-03) on 2009-09-04. 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":217648,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:47+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it not listed on 2009-09-03 and allocated (dated 2009-09-03) on 2009-09-04. 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"}}