{"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":"164.163.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/164.163.0.0-164.163.255.255/","statistics_now":{"registry":"LACNIC","status":"allocated (64 records, dated 2017-07-05 to 2026-10-14), assigned (5 records, dated 2017-07-07 to 2017-08-04)"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":40975,"date":"2025-07-24T14:06:12Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"ARIN","source_org":"HLP MOBILE AND WORLDWIDE TRACKING LTDA","recipient_org":"3Com Net Router","range":"164.163.108.0/22","log":"ARIN"},{"id":133319,"date":"2025-07-24T11:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"ARIN","source_org":"HLP Mobile and Worldwide Tracking Ltda","recipient_org":"3Com Net Router LLC","range":"164.163.108.0/22","log":"LACNIC"},{"id":132685,"date":"2024-11-29T13:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"LINNK WEB SOLUCOES EM INTERNET LTDA - ME","recipient_org":"Arias Telecomunicações Ltda","range":"164.163.104.0/22","log":"LACNIC"},{"id":132462,"date":"2023-11-28T13:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"SOLON ARAUJO TELECOMUNICACOES EIRELI - ME","recipient_org":"DTEL TELECOM","range":"164.163.12.0/22","log":"LACNIC"},{"id":132175,"date":"2022-02-22T13:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"C.B. MACEDO PROVEDOR DE INTERNET","recipient_org":"LINK BRASIL TELECOMUNICACOES LTDA","range":"164.163.192.0/22","log":"LACNIC"}],"events":[{"event_id":"6ec38d4733ea13ba","registry":"LACNIC","report_date":"2017-04-05","source":"statistics","raw_action":"RELEASED","raw_line":null,"resource_type":"ipv4","resource":"164.163.0.0/16","start":"164.163.0.0","end":"164.163.255.255","classification":"HOLD_RELEASED","classification_label":"Released from hold (LACNIC lists it as 'available')","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"LACNIC's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:04:24+00:00","page":"https://rirtracker.com/ip/164.163.0.0-164.163.255.255/#e-6ec38d4733ea13ba","report_page":"https://rirtracker.com/lacnic/reports/2017-04-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/164.163.0.0-164.163.255.255.json","observed":"164.163.0.0/16 reserved on 2017-04-04, available on 2017-04-05","explanation":"LACNIC's statistics show it reserved on 2017-04-04 and available on 2017-04-05. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed.","evidence":[{"type":"statistics_diff","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2017/delegated-lacnic-extended-20170405","retrieved_at":"2026-10-12T21:47:13+00:00","summary":"Found by comparing LACNIC's daily statistics: 164.163.0.0/16 reserved on 2017-04-04, available on 2017-04-05"},{"type":"delegated_before","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2017/delegated-lacnic-extended-20170404","retrieved_at":"2026-10-12T21:47:08+00:00","summary":"LACNIC delegated statistics 2017-04-04, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2017/delegated-lacnic-extended-20170405","retrieved_at":"2026-10-12T21:47:13+00:00","summary":"LACNIC delegated statistics 2017-04-05, after the change: available"}]},{"event_id":"4dd3fc104b15b373","registry":"APNIC","report_date":"2010-12-21","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"164.163.0.0/16","start":"164.163.0.0","end":"164.163.255.255","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":"2026-10-13T23:56:53+00:00","page":"https://rirtracker.com/ip/164.163.0.0-164.163.255.255/#e-4dd3fc104b15b373","report_page":"https://rirtracker.com/apnic/reports/2010-12-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/164.163.0.0-164.163.255.255.json","observed":"164.163.0.0/16 allocated on 2010-12-21, not listed on 2010-12-22","explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2009-06-02) on 2010-12-21 and not listed on 2010-12-22. 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-20101222.gz","retrieved_at":"2026-10-12T19:30:01+00:00","summary":"Found by comparing APNIC's daily statistics: 164.163.0.0/16 allocated on 2010-12-21, not listed on 2010-12-22"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101221.gz","retrieved_at":"2026-10-12T19:29:57+00:00","summary":"APNIC delegated statistics 2010-12-21, before the change: allocated (dated 2009-06-02)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101222.gz","retrieved_at":"2026-10-12T19:30:01+00:00","summary":"APNIC delegated statistics 2010-12-22, after the change: not listed"}]}],"classification_history":{"6ec38d4733ea13ba":[{"raw_change_id":355641,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:21:59+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2017-04-04 and available on 2017-04-05. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":355641,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:16:32+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2017-04-04 and available on 2017-04-05. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":355641,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:00:08+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2017-04-04 and available on 2017-04-05. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":355641,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:04:24+00:00","current":1,"public_explanation":"LACNIC's statistics show it reserved on 2017-04-04 and available on 2017-04-05. LACNIC moved it from its reserved (held) records to the status it calls 'available'. That is LACNIC's own label: whether and when it is reissued is not confirmed."}],"4dd3fc104b15b373":[{"raw_change_id":236188,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:22:53+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 2009-06-02) on 2010-12-21 and not listed on 2010-12-22. 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":236188,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:10:05+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 2009-06-02) on 2010-12-21 and not listed on 2010-12-22. 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":236188,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:53:11+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 2009-06-02) on 2010-12-21 and not listed on 2010-12-22. 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":236188,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:53+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 2009-06-02) on 2010-12-21 and not listed on 2010-12-22. 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":"allocated (dated 2025-07-24) (only part of the range)"}}