{"classifier_version":"1.0.0","generated":"2026-10-09T21:19:22+00:00","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by the American Registry for Internet Numbers (ARIN), the Number Resource Organization (NRO), or any 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":"137.83.10.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/137.83.10.0-137.83.10.255/","arin_statistics_now":{"file_date":"2026-10-09","status":"allocated (dated 2026-10-01)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's statistics for 2026-10-09"},"rdap_snapshots":[],"transfers":[{"id":19909,"date":"2020-01-29T16:18:38Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Northeast Technology Solutions, LLC","recipient_org":"Wholestone Farms","range":"137.83.10.0/24"},{"id":16521,"date":"2018-12-05T13:45:14Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"OMNOVA Solutions Inc","recipient_org":"Northeast Technology Solutions, LLC","range":"137.83.0.0/16"}],"events":[{"event_id":"4922d9a8391a18b2","report_date":"2026-10-01","source":"arin_issued","raw_action":"ADD","raw_line":"Add 137.83.10.0-137.83.10.255","resource_type":"ipv4","resource":"137.83.10.0/24","start":"137.83.10.0","end":"137.83.10.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:25+00:00","page":"https://rirtracker.com/ip/137.83.10.0-137.83.10.255/#e-4922d9a8391a18b2","evidence_url":"https://rirtracker.com/api/v1/events/4922d9a8391a18b2.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-09-30 and allocated (dated 2026-10-01) on 2026-10-02. The tracker saw this range removed from registration on 2026-05-11 (137.83.10.0/24), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-October/006505.html","retrieved_at":"2026-10-09T18:54:11+00:00","summary":"ARIN-Issued report for 2026-10-01: \"Add 137.83.10.0-137.83.10.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260930","retrieved_at":"2026-10-09T19:08:27+00:00","summary":"ARIN delegated statistics 2026-09-30 (produced 2026-09-30T13:00:21+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261002","retrieved_at":"2026-10-09T19:08:33+00:00","summary":"ARIN delegated statistics 2026-10-02 (produced 2026-10-02T13:00:22+00:00), after the report: allocated (dated 2026-10-01)"}]},{"event_id":"6e7b5c58cc5a770c","report_date":"2026-10-01","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 137.83.10.0-137.83.10.255","resource_type":"ipv4","resource":"137.83.10.0/24","start":"137.83.10.0","end":"137.83.10.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","page":"https://rirtracker.com/ip/137.83.10.0-137.83.10.255/#e-6e7b5c58cc5a770c","evidence_url":"https://rirtracker.com/api/v1/events/6e7b5c58cc5a770c.json","explanation":"ARIN's statistics show it reserved on 2026-09-30 and allocated (dated 2026-10-01) on 2026-10-02. ARIN removed its own pool record for this range as part of issuing it: the same report adds 137.83.10.0-137.83.10.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2026-October/006505.html","retrieved_at":"2026-10-09T18:54:11+00:00","summary":"ARIN-Issued report for 2026-10-01: \"Remove 137.83.10.0-137.83.10.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260930","retrieved_at":"2026-10-09T19:08:27+00:00","summary":"ARIN delegated statistics 2026-09-30 (produced 2026-09-30T13:00:21+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20261002","retrieved_at":"2026-10-09T19:08:33+00:00","summary":"ARIN delegated statistics 2026-10-02 (produced 2026-10-02T13:00:22+00:00), after the report: allocated (dated 2026-10-01)"}]},{"event_id":"ea205373161eec79","report_date":"2026-05-11","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"137.83.10.0/24","start":"137.83.10.0","end":"137.83.10.255","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":"1.0.0","classified_at":"2026-10-09T19:28:29+00:00","page":"https://rirtracker.com/ip/137.83.10.0-137.83.10.255/#e-ea205373161eec79","evidence_url":"https://rirtracker.com/api/v1/events/ea205373161eec79.json","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":"2026-07-10","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 allocated (dated 2020-01-29) on 2026-05-10 and reserved on 2026-05-12. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-07-10. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260512","retrieved_at":"2026-10-09T19:01:14+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 137.83.10.0/24 allocated on 2026-05-11, reserved on 2026-05-12"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260510","retrieved_at":"2026-10-09T19:01:08+00:00","summary":"ARIN delegated statistics 2026-05-10 (produced 2026-05-10T13:00:39+00:00), before the report: allocated (dated 2020-01-29)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260512","retrieved_at":"2026-10-09T19:01:14+00:00","summary":"ARIN delegated statistics 2026-05-12 (produced 2026-05-12T13:00:41+00:00), after the report: reserved"}]}],"classification_history":{"4922d9a8391a18b2":[{"raw_change_id":4859,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:25+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2026-09-30 and allocated (dated 2026-10-01) on 2026-10-02. The tracker saw this range removed from registration on 2026-05-11 (137.83.10.0/24), so it appears to have been issued again from ARIN's pool."}],"6e7b5c58cc5a770c":[{"raw_change_id":4761,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:24+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2026-09-30 and allocated (dated 2026-10-01) on 2026-10-02. ARIN removed its own pool record for this range as part of issuing it: the same report adds 137.83.10.0-137.83.10.255. The issuance is explained on that line."}],"ea205373161eec79":[{"raw_change_id":6591,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.0.0","classified_at":"2026-10-09T19:28:29+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 allocated (dated 2020-01-29) on 2026-05-10 and reserved on 2026-05-12. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 for 60 days before reissuing them, so the earliest estimated hold expiration is 2026-07-10. This does not confirm availability."}]}}