{"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":"161.129.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/161.129.0.0-161.129.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (53 records, dated 2018-03-28 to 2024-09-09)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":43093,"date":"2026-03-06T20:23:01Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Westelcom Internet, Inc.","recipient_org":"Slic Network Solutions, Inc","range":"161.129.188.0/24","log":"ARIN"},{"id":37325,"date":"2024-11-21T15:38:46Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Full Throttle Networks Inc.","recipient_org":"Xplornet Communications Inc.","range":"161.129.30.0/24","log":"ARIN"},{"id":36691,"date":"2024-09-09T13:09:04Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"QuadraNet Enterprises LLC","recipient_org":"Interserver, Inc","range":"161.129.64.0/21","log":"ARIN"},{"id":34905,"date":"2024-03-21T20:10:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Dynamic Signal, Inc.","recipient_org":"Firstup, Inc.","range":"161.129.72.0/24","log":"ARIN"},{"id":34356,"date":"2024-02-06T17:48:55Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Nexril","recipient_org":"PureVoltage Hosting Inc.","range":"161.129.152.0/22","log":"ARIN"},{"id":32654,"date":"2023-08-08T15:27:06Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Fastnet Communications","recipient_org":"FlexNetworks","range":"161.129.245.0/24","log":"ARIN"},{"id":28557,"date":"2022-07-13T15:24:53Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Digicloud Solutions Corporation","recipient_org":"Iland Internet Solutions Corporation","range":"161.129.80.0/20","log":"ARIN"},{"id":27858,"date":"2022-04-21T19:10:34Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Radia Telecom Inc","recipient_org":"SCI REMC","range":"161.129.192.0/20","log":"ARIN"},{"id":26037,"date":"2021-11-12T20:05:18Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"OCULUS SOLUTIONS LLC","recipient_org":"OCULUS NETWORKS INC","range":"161.129.160.0/20","log":"ARIN"},{"id":25182,"date":"2021-07-22T18:15:42Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Radia Telecom Inc","recipient_org":"Datto, Inc","range":"161.129.208.0/20","log":"ARIN"},{"id":24796,"date":"2021-06-02T05:07:32Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"CINTEK","recipient_org":"TELUS Communications Inc.","range":"161.129.144.0/21","log":"ARIN"},{"id":22671,"date":"2021-01-25T22:32:59Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"9421092 Canada Inc.","recipient_org":"OCULUS SOLUTIONS LLC","range":"161.129.160.0/20","log":"ARIN"},{"id":20727,"date":"2020-05-14T21:53:44Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"FAL Networks","recipient_org":"Westman Communications Group","range":"161.129.128.0/21","log":"ARIN"},{"id":20301,"date":"2020-03-25T12:03:41Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Monument & Cathedral Holdings, Inc.","recipient_org":"14 W Administrative Services LLC","range":"161.129.24.0/22","log":"ARIN"},{"id":19303,"date":"2019-11-12T13:04:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"10VPN Hosting","recipient_org":"Free Range Cloud Hosting Inc.","range":"161.129.60.0/24","log":"ARIN"},{"id":18588,"date":"2019-08-08T19:00:42Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"FluxWeb LLC","recipient_org":"Fastnet Communications","range":"161.129.245.0/24","log":"ARIN"},{"id":14331,"date":"2018-08-30T14:45:44Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"QuadraNet, Inc","recipient_org":"QuadraNet Enterprises LLC","range":"161.129.64.0/21","log":"ARIN"},{"id":14084,"date":"2018-08-07T11:37:20Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"BuffaloColo, LLC","recipient_org":"QuadraNet, Inc","range":"161.129.64.0/21","log":"ARIN"}],"events":[{"event_id":"f706655c507fcef0","registry":"ARIN","report_date":"2017-04-11","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"161.129.0.0/16","start":"161.129.0.0","end":"161.129.255.255","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":"2026-10-14T00:02:54+00:00","page":"https://rirtracker.com/ip/161.129.0.0-161.129.255.255/#e-f706655c507fcef0","report_page":"https://rirtracker.com/arin/reports/2017-04-11/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/161.129.0.0-161.129.255.255.json","observed":"161.129.0.0/16 assigned on 2017-04-11, reserved on 2017-04-12","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":"2017-06-10","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 1992-08-05) on 2017-04-10 and reserved on 2017-04-12. 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 2017-06-10. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170412.gz","retrieved_at":"2026-10-12T21:26:26+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 161.129.0.0/16 assigned on 2017-04-11, reserved on 2017-04-12"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170410.gz","retrieved_at":"2026-10-12T21:26:21+00:00","summary":"ARIN delegated statistics 2017-04-10 (produced 2017-04-10T05:09:04+00:00), before the report: assigned (dated 1992-08-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170412.gz","retrieved_at":"2026-10-12T21:26:26+00:00","summary":"ARIN delegated statistics 2017-04-12 (produced 2017-04-12T05:10:43+00:00), after the report: reserved"}]}],"classification_history":{"f706655c507fcef0":[{"raw_change_id":332098,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:10:32+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 1992-08-05) on 2017-04-10 and reserved on 2017-04-12. 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 2017-06-10. This does not confirm availability."},{"raw_change_id":332098,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:15:17+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 1992-08-05) on 2017-04-10 and reserved on 2017-04-12. 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 2017-06-10. This does not confirm availability."},{"raw_change_id":332098,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:58:47+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 1992-08-05) on 2017-04-10 and reserved on 2017-04-12. 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 2017-06-10. This does not confirm availability."},{"raw_change_id":332098,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:54+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 1992-08-05) on 2017-04-10 and reserved on 2017-04-12. 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 2017-06-10. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (53 records, dated 2018-03-28 to 2024-09-09)"}}