{"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":"164.138.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/164.138.0.0-164.138.255.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 2012-03-16), allocated (dated 2012-03-19), allocated (dated 2012-03-20), allocated (dated 2018-07-02), allocated (dated 2025-07-09), allocated (dated 2025-07-10), allocated (dated 2025-07-11), reserved"},"current_holder":{"rir":null,"org":null,"how":null},"rdap_snapshots":[],"transfers":[{"id":120006,"date":"2026-04-13T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Boundless Networks Limited","recipient_org":"Quickline Communications Limited","range":"164.138.80.0/21","log":"RIPE NCC"},{"id":110176,"date":"2024-12-20T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"ProstoDNS Ltd.","recipient_org":"Nameto Oy","range":"164.138.0.0/20","log":"RIPE NCC"},{"id":99615,"date":"2023-11-13T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Sleek Networks Ltd","recipient_org":"Rackspace Ltd.","range":"164.138.224.0/21","log":"RIPE NCC"},{"id":91404,"date":"2022-12-06T19:00:00Z","type":"MERGER_ACQUISITION","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"netgo Aachen GmbH","recipient_org":"netgo tax GmbH","range":"164.138.192.0/21","log":"RIPE NCC"},{"id":86997,"date":"2022-05-06T19:00:00Z","type":"MERGER_ACQUISITION","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"DESARROLLO Y SISTEMAS INFORMATICOS CANARIAS SL","recipient_org":"DESARROLLO Y SISTEMAS INFORMATICOS CANARIAS SL","range":"164.138.200.0/21","log":"RIPE NCC"},{"id":86638,"date":"2022-04-20T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Scibile Network SA","recipient_org":"HCL Technologies B.V.","range":"164.138.64.0/20","log":"RIPE NCC"},{"id":79645,"date":"2021-07-20T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Limited Liability Company \"LUCKY PLAY\"","recipient_org":"Classwire Limited","range":"164.138.96.0/22","log":"RIPE NCC"},{"id":73439,"date":"2020-11-11T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"FLOW Commerce Ltd","recipient_org":"OOO \"Network of data-centers \"Selectel\"","range":"164.138.100.0/22","log":"RIPE NCC"},{"id":52057,"date":"2016-11-09T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Aksoran LLP","recipient_org":"Kcell JSC","range":"164.138.40.0/21","log":"RIPE NCC"},{"id":46587,"date":"2014-10-27T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"NETSERV CONSULT SRL","recipient_org":"Mobile Communication Company of Iran PLC","range":"164.138.128.0/18","log":"RIPE NCC"}],"events":[{"event_id":"1b711028274a5ca0","registry":"RIPE NCC","report_date":"2012-03-15","source":"statistics","raw_action":"RELEASED","raw_line":null,"resource_type":"ipv4","resource":"164.138.0.0/16","start":"164.138.0.0","end":"164.138.255.255","classification":"HOLD_RELEASED","classification_label":"Released from hold (the RIPE NCC lists it as 'available')","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"The RIPE NCC's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:09+00:00","page":"https://rirtracker.com/ip/164.138.0.0-164.138.255.255/#e-1b711028274a5ca0","report_page":"https://rirtracker.com/ripe/reports/2012-03-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/164.138.0.0-164.138.255.255.json","observed":"164.138.0.0/16 reserved on 2012-03-14, available on 2012-03-15","explanation":"The RIPE NCC's statistics show it reserved on 2012-03-14 and available on 2012-03-15. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2010-08-07, 586 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2012-03-16: Added 164.138.0.0/20; 2012-03-16: Added 164.138.16.0/21; 2012-03-16: Added 164.138.24.0/21), so the before-and-after statistics may include it.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2012/delegated-ripencc-extended-20120315.bz2","retrieved_at":"2026-10-12T19:13:06+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 164.138.0.0/16 reserved on 2012-03-14, available on 2012-03-15"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2012/delegated-ripencc-extended-20120314.bz2","retrieved_at":"2026-10-12T19:13:03+00:00","summary":"RIPE NCC delegated statistics 2012-03-14 (produced 2012-03-14T22:59:59+00:00), before the change: reserved"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2012/delegated-ripencc-extended-20120315.bz2","retrieved_at":"2026-10-12T19:13:06+00:00","summary":"RIPE NCC delegated statistics 2012-03-15 (produced 2012-03-15T22:59:59+00:00), after the change: available"}]},{"event_id":"5bcb7a11f8675a1e","registry":"RIPE NCC","report_date":"2010-08-07","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"164.138.0.0/16","start":"164.138.0.0","end":"164.138.255.255","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":"2026-10-13T23:54:12+00:00","page":"https://rirtracker.com/ip/164.138.0.0-164.138.255.255/#e-5bcb7a11f8675a1e","report_page":"https://rirtracker.com/ripe/reports/2010-08-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/164.138.0.0-164.138.255.255.json","observed":"164.138.0.0/16 assigned on 2010-08-06, available on 2010-08-07","explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 2001-09-12) on 2010-08-06 and available on 2010-08-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100807.bz2","retrieved_at":"2026-10-12T18:42:16+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 164.138.0.0/16 assigned on 2010-08-06, available on 2010-08-07"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100806.bz2","retrieved_at":"2026-10-12T18:42:13+00:00","summary":"RIPE NCC delegated statistics 2010-08-06, before the change: assigned (dated 2001-09-12)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2010/delegated-ripencc-extended-20100807.bz2","retrieved_at":"2026-10-12T18:42:16+00:00","summary":"RIPE NCC delegated statistics 2010-08-07, after the change: available"}]}],"classification_history":{"1b711028274a5ca0":[{"raw_change_id":223546,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:17:59+00:00","current":0,"public_explanation":"The RIPE NCC's statistics show it reserved on 2012-03-14 and available on 2012-03-15. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2010-08-07, 586 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2012-03-16: Added 164.138.0.0/20; 2012-03-16: Added 164.138.16.0/21; 2012-03-16: Added 164.138.24.0/21), so the before-and-after statistics may include it."},{"raw_change_id":223546,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:09:26+00:00","current":0,"public_explanation":"The RIPE NCC's statistics show it reserved on 2012-03-14 and available on 2012-03-15. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2010-08-07, 586 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2012-03-16: Added 164.138.0.0/20; 2012-03-16: Added 164.138.16.0/21; 2012-03-16: Added 164.138.24.0/21), so the before-and-after statistics may include it."},{"raw_change_id":223546,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:52:28+00:00","current":0,"public_explanation":"The RIPE NCC's statistics show it reserved on 2012-03-14 and available on 2012-03-15. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2010-08-07, 586 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2012-03-16: Added 164.138.0.0/20; 2012-03-16: Added 164.138.16.0/21; 2012-03-16: Added 164.138.24.0/21), so the before-and-after statistics may include it."},{"raw_change_id":223546,"classification_code":"HOLD_RELEASED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:09+00:00","current":1,"public_explanation":"The RIPE NCC's statistics show it reserved on 2012-03-14 and available on 2012-03-15. The RIPE NCC moved it from its reserved (held) records to the status it calls 'available'. The tracker saw it removed from registration on 2010-08-07, 586 days earlier. That is the RIPE NCC's own label: whether and when it is reissued is not confirmed. Another change to this range was reported the day before or after (2012-03-16: Added 164.138.0.0/20; 2012-03-16: Added 164.138.16.0/21; 2012-03-16: Added 164.138.24.0/21), so the before-and-after statistics may include it."}],"5bcb7a11f8675a1e":[{"raw_change_id":189421,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:03:25+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 2001-09-12) on 2010-08-06 and available on 2010-08-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC holds returned, revoked and reclaimed IPv4 space for 180 days (six months), or longer while still routed, before reissuing it, so the earliest estimated hold expiration is 2011-02-03. This does not confirm availability."},{"raw_change_id":189421,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:49+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 2001-09-12) on 2010-08-06 and available on 2010-08-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":189421,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:41+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 2001-09-12) on 2010-08-06 and available on 2010-08-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":189421,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:12+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing the RIPE NCC's daily statistics. The RIPE NCC's statistics show it assigned (dated 2001-09-12) on 2010-08-06 and available on 2010-08-07. Public sources do not distinguish a voluntary return, revocation, or reclamation. The RIPE NCC's current hold for IPv4 space applies to removals from 2014-03-26 on, and this one came earlier, so the tracker gives no estimate. This does not confirm availability."}]},"arin_statistics_now":{"status":"not listed"}}