{"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":"199.66.8.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/199.66.8.0-199.66.15.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-03-07), allocated (dated 2018-04-30)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":13026,"date":"2018-04-30T15:30:31Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"MF Global Holdings USA Inc","recipient_org":"Tesla, Inc.","range":"199.66.8.0/22","log":"ARIN"},{"id":12531,"date":"2018-03-07T15:43:12Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"MF Global Holdings USA Inc","recipient_org":"Indianola Municipal Utilities","range":"199.66.12.0/22","log":"ARIN"}],"events":[{"event_id":"e8416b1eb00d51ea","registry":"ARIN","report_date":"2015-04-07","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"199.66.8.0/21","start":"199.66.8.0","end":"199.66.15.255","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":"2026-10-14T00:00:45+00:00","page":"https://rirtracker.com/ip/199.66.8.0-199.66.15.255/#e-e8416b1eb00d51ea","report_page":"https://rirtracker.com/arin/reports/2015-04-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.66.8.0-199.66.15.255.json","observed":"199.66.8.0/21 assigned on 2015-04-07, reserved on 2015-04-08","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":"2015-06-06","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 1993-11-24) on 2015-04-06 and reserved on 2015-04-08. 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 2015-06-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150408.gz","retrieved_at":"2026-10-12T20:50:51+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 199.66.8.0/21 assigned on 2015-04-07, reserved on 2015-04-08"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150406.gz","retrieved_at":"2026-10-12T20:50:46+00:00","summary":"ARIN delegated statistics 2015-04-06 (produced 2015-04-06T05:05:59+00:00), before the report: assigned (dated 1993-11-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150408.gz","retrieved_at":"2026-10-12T20:50:51+00:00","summary":"ARIN delegated statistics 2015-04-08 (produced 2015-04-08T05:03:56+00:00), after the report: reserved"}]},{"event_id":"54b8012374431944","registry":"ARIN","report_date":"2013-07-09","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"199.66.8.0/21","start":"199.66.8.0","end":"199.66.15.255","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":"2026-10-13T23:58:18+00:00","page":"https://rirtracker.com/ip/199.66.8.0-199.66.15.255/#e-54b8012374431944","report_page":"https://rirtracker.com/arin/reports/2013-07-09/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.66.8.0-199.66.15.255.json","observed":"199.66.8.0/21 assigned on 2013-07-09, reserved on 2013-07-10","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":"2013-09-07","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 1993-11-24) on 2013-07-08 and reserved on 2013-07-10. 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 2013-09-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130710.gz","retrieved_at":"2026-10-12T20:01:28+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 199.66.8.0/21 assigned on 2013-07-09, reserved on 2013-07-10"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130708.gz","retrieved_at":"2026-10-12T20:01:23+00:00","summary":"ARIN delegated statistics 2013-07-08 (produced 2013-07-08T05:06:27+00:00), before the report: assigned (dated 1993-11-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20130710.gz","retrieved_at":"2026-10-12T20:01:28+00:00","summary":"ARIN delegated statistics 2013-07-10 (produced 2013-07-10T05:06:38+00:00), after the report: reserved"}]}],"classification_history":{"e8416b1eb00d51ea":[{"raw_change_id":298826,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:55:29+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 1993-11-24) on 2015-04-06 and reserved on 2015-04-08. 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 2015-06-06. This does not confirm availability."},{"raw_change_id":298826,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:13:26+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 1993-11-24) on 2015-04-06 and reserved on 2015-04-08. 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 2015-06-06. This does not confirm availability."},{"raw_change_id":298826,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:56:49+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 1993-11-24) on 2015-04-06 and reserved on 2015-04-08. 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 2015-06-06. This does not confirm availability."},{"raw_change_id":298826,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:00:45+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 1993-11-24) on 2015-04-06 and reserved on 2015-04-08. 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 2015-06-06. This does not confirm availability."}],"54b8012374431944":[{"raw_change_id":260814,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:36:17+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 1993-11-24) on 2013-07-08 and reserved on 2013-07-10. 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 2013-09-07. This does not confirm availability."},{"raw_change_id":260814,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:19+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 1993-11-24) on 2013-07-08 and reserved on 2013-07-10. 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 2013-09-07. This does not confirm availability."},{"raw_change_id":260814,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:32+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 1993-11-24) on 2013-07-08 and reserved on 2013-07-10. 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 2013-09-07. This does not confirm availability."},{"raw_change_id":260814,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:18+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 1993-11-24) on 2013-07-08 and reserved on 2013-07-10. 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 2013-09-07. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2018-03-07), allocated (dated 2018-04-30)"}}