{"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":"199.16.36.0 - 199.16.63.255","resource_type":"ipv4","page":"https://rirtracker.com/ip/199.16.36.0-199.16.63.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2011-10-10), allocated (dated 2011-10-11)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":30101,"date":"2023-01-13T18:50:06Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"NetGain","recipient_org":"Aunalytics, Inc","range":"199.16.36.0/22","log":"ARIN"},{"id":22245,"date":"2020-12-09T22:43:48Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Quonix Networks Inc.","recipient_org":"Data102","range":"199.16.48.0/21","log":"ARIN"}],"events":[{"event_id":"6e178a03143cb7d1","registry":"ARIN","report_date":"2011-10-10","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 199.16.36.0-199.16.63.255","resource_type":"ipv4","resource":"199.16.36.0 - 199.16.63.255","start":"199.16.36.0","end":"199.16.63.255","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":"2026-10-13T23:50:56+00:00","page":"https://rirtracker.com/ip/199.16.36.0-199.16.63.255/#e-6e178a03143cb7d1","report_page":"https://rirtracker.com/arin/reports/2011-10-10/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.16.36.0-199.16.63.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2011-10-09 and allocated (dated 2011-10-10), not issued on 2011-10-11. (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. Another change to this range was reported the day before or after (2011-10-11: Add 199.16.60.0-199.16.63.255), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2011-October/001033.html","retrieved_at":"2026-10-12T18:37:16+00:00","summary":"ARIN-Issued report for 2011-10-10: \"Remove 199.16.36.0-199.16.63.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20111009.gz","retrieved_at":"2026-10-12T19:26:13+00:00","summary":"ARIN delegated statistics 2011-10-09, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2011/delegated-arin-20111011.gz","retrieved_at":"2026-10-12T19:26:17+00:00","summary":"ARIN delegated statistics 2011-10-11, after the report: allocated (dated 2011-10-10), not issued"}]}],"classification_history":{"6e178a03143cb7d1":[{"raw_change_id":124677,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:15:14+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2011-10-09 and allocated (dated 2011-10-10), not issued on 2011-10-11. (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. Another change to this range was reported the day before or after (2011-10-11: Add 199.16.60.0-199.16.63.255), so the before-and-after statistics may include it."},{"raw_change_id":124677,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:22+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2011-10-09 and allocated (dated 2011-10-10), not issued on 2011-10-11. (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. Another change to this range was reported the day before or after (2011-10-11: Add 199.16.60.0-199.16.63.255), so the before-and-after statistics may include it."},{"raw_change_id":124677,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:56+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2011-10-09 and allocated (dated 2011-10-10), not issued on 2011-10-11. (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. Another change to this range was reported the day before or after (2011-10-11: Add 199.16.60.0-199.16.63.255), so the before-and-after statistics may include it."},{"raw_change_id":124677,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:56+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2011-10-09 and allocated (dated 2011-10-10), not issued on 2011-10-11. (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. Another change to this range was reported the day before or after (2011-10-11: Add 199.16.60.0-199.16.63.255), so the before-and-after statistics may include it."}]},"arin_statistics_now":{"status":"allocated (dated 2011-10-10), allocated (dated 2011-10-11)"}}