{"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":"170.231.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/170.231.0.0-170.231.255.255/","statistics_now":{"registry":"LACNIC","status":"allocated (65 records, dated 2016-06-15 to 2023-08-18), assigned (1 record, dated 2016-06-20)"},"current_holder":{"rir":"LACNIC","org":null,"how":"LACNIC's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":132493,"date":"2024-01-16T13:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"JEFERSON DE JESUS SANTOS AMORIM","recipient_org":"PROVNET SERVIÇOS DE TELECOMUNICAÇÕES LTDA.","range":"170.231.144.0/22","log":"LACNIC"},{"id":132387,"date":"2023-06-30T11:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"NS LINK PROVEDOR DE ACESSO A INTERNET","recipient_org":"ZAAPNET TELECOMUNICACOES LTDA","range":"170.231.149.0/24","log":"LACNIC"},{"id":132385,"date":"2023-06-30T11:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"NS LINK PROVEDOR DE ACESSO A INTERNET","recipient_org":"ZAAPNET TELECOMUNICACOES LTDA","range":"170.231.150.0/24","log":"LACNIC"},{"id":132386,"date":"2023-06-30T11:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"NS LINK PROVEDOR DE ACESSO A INTERNET","recipient_org":"ZAAPNET TELECOMUNICACOES LTDA","range":"170.231.151.0/24","log":"LACNIC"},{"id":131983,"date":"2019-12-26T13:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"LACNIC","recipient_rir":"LACNIC","source_org":"AIR TELECOM E.I.R.L.","recipient_org":"OPTICAL TECHNOLOGIES SAC","range":"170.231.168.0/22","log":"LACNIC"}],"events":[{"event_id":"5891d44a4cdad762","registry":"LACNIC","report_date":"2014-04-23","source":"statistics","raw_action":"RELEASED","raw_line":null,"resource_type":"ipv4","resource":"170.231.0.0/16","start":"170.231.0.0","end":"170.231.255.255","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":"2026-10-13T23:58:48+00:00","page":"https://rirtracker.com/ip/170.231.0.0-170.231.255.255/#e-5891d44a4cdad762","report_page":"https://rirtracker.com/lacnic/reports/2014-04-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/170.231.0.0-170.231.255.255.json","observed":"170.231.0.0/16 reserved on 2014-04-22, available on 2014-04-23","explanation":"LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. 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/2014/delegated-lacnic-extended-20140423","retrieved_at":"2026-10-12T20:09:33+00:00","summary":"Found by comparing LACNIC's daily statistics: 170.231.0.0/16 reserved on 2014-04-22, available on 2014-04-23"},{"type":"delegated_before","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2014/delegated-lacnic-extended-20140422","retrieved_at":"2026-10-12T20:09:28+00:00","summary":"LACNIC delegated statistics 2014-04-22, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2014/delegated-lacnic-extended-20140423","retrieved_at":"2026-10-12T20:09:33+00:00","summary":"LACNIC delegated statistics 2014-04-23, after the change: available"}]},{"event_id":"76de0b8c765ed9a4","registry":"ARIN","report_date":"2010-12-02","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 170.231.0.0-170.231.255.255","resource_type":"ipv4","resource":"170.231.0.0/16","start":"170.231.0.0","end":"170.231.255.255","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":"2026-10-13T23:50:50+00:00","page":"https://rirtracker.com/ip/170.231.0.0-170.231.255.255/#e-76de0b8c765ed9a4","report_page":"https://rirtracker.com/arin/reports/2010-12-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/170.231.0.0-170.231.255.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-December/000717.html","retrieved_at":"2026-10-12T18:36:55+00:00","summary":"ARIN-Issued report for 2010-12-02: \"Remove 170.231.0.0-170.231.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101201.gz","retrieved_at":"2026-10-12T19:13:27+00:00","summary":"ARIN delegated statistics 2010-12-01, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101203.gz","retrieved_at":"2026-10-12T19:13:34+00:00","summary":"ARIN delegated statistics 2010-12-03, after the report: not issued"}]},{"event_id":"82ea325165ca9f2d","registry":"ARIN","report_date":"2009-12-09","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"170.231.0.0/16","start":"170.231.0.0","end":"170.231.255.255","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":"2026-10-13T23:55:30+00:00","page":"https://rirtracker.com/ip/170.231.0.0-170.231.255.255/#e-82ea325165ca9f2d","report_page":"https://rirtracker.com/arin/reports/2009-12-09/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/170.231.0.0-170.231.255.255.json","observed":"170.231.0.0/16 assigned on 2009-12-09, not listed on 2009-12-10","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":"2010-02-07","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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20091210.gz","retrieved_at":"2026-10-12T18:58:45+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 170.231.0.0/16 assigned on 2009-12-09, not listed on 2009-12-10"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20091208.gz","retrieved_at":"2026-10-12T18:58:40+00:00","summary":"ARIN delegated statistics 2009-12-08, before the report: assigned (dated 1996-04-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20091210.gz","retrieved_at":"2026-10-12T18:58:45+00:00","summary":"ARIN delegated statistics 2009-12-10, after the report: not issued"}]}],"classification_history":{"5891d44a4cdad762":[{"raw_change_id":269339,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:40:35+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. 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":269339,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:46+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. 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":269339,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:55:01+00:00","current":0,"public_explanation":"LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. 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":269339,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:48+00:00","current":1,"public_explanation":"LACNIC's statistics show it reserved on 2014-04-22 and available on 2014-04-23. 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."}],"76de0b8c765ed9a4":[{"raw_change_id":122140,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:53+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":122140,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:17+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":122140,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:51+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":122140,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:50+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."}],"82ea325165ca9f2d":[{"raw_change_id":212774,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:13:30+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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability."},{"raw_change_id":212774,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:53+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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability."},{"raw_change_id":212774,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:52+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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability."},{"raw_change_id":212774,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:30+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 1996-04-17) on 2009-12-08 and not issued on 2009-12-10. (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 2010-02-07. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}