{"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":"210.56.144.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/210.56.144.0-210.56.151.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 2025-08-08), assigned (dated 2025-08-07), assigned (dated 2025-08-08)"},"current_holder":{"rir":"APNIC","org":null,"how":"APNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"462373dae9b8a2f4","registry":"APNIC","report_date":"2020-08-05","source":"statistics","raw_action":"RELEASED","raw_line":null,"resource_type":"ipv4","resource":"210.56.144.0/21","start":"210.56.144.0","end":"210.56.151.255","classification":"HOLD_RELEASED","classification_label":"Released from hold (APNIC lists it as 'available')","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"APNIC's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:10:57+00:00","page":"https://rirtracker.com/ip/210.56.144.0-210.56.151.255/#e-462373dae9b8a2f4","report_page":"https://rirtracker.com/apnic/reports/2020-08-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/210.56.144.0-210.56.151.255.json","observed":"210.56.144.0/21 reserved on 2020-08-05, available on 2020-08-06","explanation":"APNIC's statistics show it reserved on 2020-08-05 and available on 2020-08-06. APNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-08-02, 369 days earlier. That is APNIC's own label: whether and when it is reissued is not confirmed.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200806.gz","retrieved_at":"2026-10-12T23:24:59+00:00","summary":"Found by comparing APNIC's daily statistics: 210.56.144.0/21 reserved on 2020-08-05, available on 2020-08-06"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200805.gz","retrieved_at":"2026-10-12T23:24:55+00:00","summary":"APNIC delegated statistics 2020-08-05, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200806.gz","retrieved_at":"2026-10-12T23:24:59+00:00","summary":"APNIC delegated statistics 2020-08-06, after the change: available"}]},{"event_id":"7d20788ae32bd1d3","registry":"APNIC","report_date":"2019-08-02","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"210.56.144.0/21","start":"210.56.144.0","end":"210.56.151.255","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":"2026-10-14T00:09:07+00:00","page":"https://rirtracker.com/ip/210.56.144.0-210.56.151.255/#e-7d20788ae32bd1d3","report_page":"https://rirtracker.com/apnic/reports/2019-08-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/210.56.144.0-210.56.151.255.json","observed":"210.56.144.0/21 allocated on 2019-08-02, reserved on 2019-08-03","hold":{"hold_rule_source_url":"https://www.apnic.net/manage-ip/manage-resources/address-status","hold_rule_months":12,"estimated_hold_end":"2020-08-02","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 2010-03-23) on 2019-08-02 and reserved on 2019-08-03. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2020-08-02. 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/2019/delegated-apnic-extended-20190803.gz","retrieved_at":"2026-10-12T22:58:06+00:00","summary":"Found by comparing APNIC's daily statistics: 210.56.144.0/21 allocated on 2019-08-02, reserved on 2019-08-03"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190802.gz","retrieved_at":"2026-10-12T22:58:03+00:00","summary":"APNIC delegated statistics 2019-08-02, before the change: allocated (dated 2010-03-23)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190803.gz","retrieved_at":"2026-10-12T22:58:06+00:00","summary":"APNIC delegated statistics 2019-08-03, after the change: reserved"}]},{"event_id":"41fba651fea89073","registry":"APNIC","report_date":"2012-04-30","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"210.56.144.0/21","start":"210.56.144.0","end":"210.56.151.255","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":"2026-10-13T23:58:09+00:00","page":"https://rirtracker.com/ip/210.56.144.0-210.56.151.255/#e-41fba651fea89073","report_page":"https://rirtracker.com/apnic/reports/2012-04-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/210.56.144.0-210.56.151.255.json","observed":"210.56.144.0/21 reserved on 2012-04-30, allocated on 2012-05-01","explanation":"No transfer record matches. APNIC's statistics show it reserved on 2012-04-30 and allocated (dated 2010-03-23) on 2012-05-01. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2012/delegated-apnic-extended-20120501.gz","retrieved_at":"2026-10-12T19:59:18+00:00","summary":"Found by comparing APNIC's daily statistics: 210.56.144.0/21 reserved on 2012-04-30, allocated on 2012-05-01"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2012/delegated-apnic-extended-20120430.gz","retrieved_at":"2026-10-12T19:59:14+00:00","summary":"APNIC delegated statistics 2012-04-30, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2012/delegated-apnic-extended-20120501.gz","retrieved_at":"2026-10-12T19:59:18+00:00","summary":"APNIC delegated statistics 2012-05-01, after the change: allocated (dated 2010-03-23)"}]},{"event_id":"718fc00122033aba","registry":"APNIC","report_date":"2009-10-12","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"210.56.144.0/21","start":"210.56.144.0","end":"210.56.151.255","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":"2026-10-13T23:55:53+00:00","page":"https://rirtracker.com/ip/210.56.144.0-210.56.151.255/#e-718fc00122033aba","report_page":"https://rirtracker.com/apnic/reports/2009-10-12/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/210.56.144.0-210.56.151.255.json","observed":"210.56.144.0/21 allocated on 2009-10-12, not listed on 2009-10-13","explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2006-07-06) on 2009-10-12 and not listed on 2009-10-13. 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/2009/delegated-apnic-extended-20091013.gz","retrieved_at":"2026-10-12T19:07:35+00:00","summary":"Found by comparing APNIC's daily statistics: 210.56.144.0/21 allocated on 2009-10-12, not listed on 2009-10-13"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2009/delegated-apnic-extended-20091012.gz","retrieved_at":"2026-10-12T19:07:32+00:00","summary":"APNIC delegated statistics 2009-10-12, before the change: allocated (dated 2006-07-06)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2009/delegated-apnic-extended-20091013.gz","retrieved_at":"2026-10-12T19:07:35+00:00","summary":"APNIC delegated statistics 2009-10-13, after the change: not listed"}]}],"classification_history":{"462373dae9b8a2f4":[{"raw_change_id":452223,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:02:15+00:00","current":0,"public_explanation":"APNIC's statistics show it reserved on 2020-08-05 and available on 2020-08-06. APNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-08-02, 369 days earlier. That is APNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":452223,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:21:56+00:00","current":0,"public_explanation":"APNIC's statistics show it reserved on 2020-08-05 and available on 2020-08-06. APNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-08-02, 369 days earlier. That is APNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":452223,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:05:57+00:00","current":0,"public_explanation":"APNIC's statistics show it reserved on 2020-08-05 and available on 2020-08-06. APNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-08-02, 369 days earlier. That is APNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":452223,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:10:57+00:00","current":1,"public_explanation":"APNIC's statistics show it reserved on 2020-08-05 and available on 2020-08-06. APNIC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2019-08-02, 369 days earlier. That is APNIC's own label: whether and when it is reissued is not confirmed."}],"7d20788ae32bd1d3":[{"raw_change_id":425620,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:50:24+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 2010-03-23) on 2019-08-02 and reserved on 2019-08-03. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":425620,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:20:25+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 2010-03-23) on 2019-08-02 and reserved on 2019-08-03. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":425620,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:04:19+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 2010-03-23) on 2019-08-02 and reserved on 2019-08-03. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":425620,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:07+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 2010-03-23) on 2019-08-02 and reserved on 2019-08-03. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2020-08-02. That is what APNIC has done, not a rule it states. This does not confirm availability."}],"41fba651fea89073":[{"raw_change_id":258613,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:35:08+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2012-04-30 and allocated (dated 2010-03-23) on 2012-05-01. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance."},{"raw_change_id":258613,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:12+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2012-04-30 and allocated (dated 2010-03-23) on 2012-05-01. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance."},{"raw_change_id":258613,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:24+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2012-04-30 and allocated (dated 2010-03-23) on 2012-05-01. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance."},{"raw_change_id":258613,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:09+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2012-04-30 and allocated (dated 2010-03-23) on 2012-05-01. The new registration isn't dated near that day, so the tracker can't tell whether this is a new issuance."}],"718fc00122033aba":[{"raw_change_id":219290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:16:22+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 2006-07-06) on 2009-10-12 and not listed on 2009-10-13. 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 IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":219290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:09:13+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 2006-07-06) on 2009-10-12 and not listed on 2009-10-13. 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 IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":219290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:52:14+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 2006-07-06) on 2009-10-12 and not listed on 2009-10-13. 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 IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":219290,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:53+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 2006-07-06) on 2009-10-12 and not listed on 2009-10-13. 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."}]},"arin_statistics_now":{"status":"not listed"}}