{"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":"66.6.48.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/66.6.48.0-66.6.63.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2023-12-20), allocated (dated 2023-12-21), allocated (dated 2023-12-27)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"889de235ed8e1c2b","registry":"ARIN","report_date":"2023-12-19","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 66.6.48.0-66.6.63.255","resource_type":"ipv4","resource":"66.6.48.0/20","start":"66.6.48.0","end":"66.6.63.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","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":"2026-10-13T23:53:54+00:00","page":"https://rirtracker.com/ip/66.6.48.0-66.6.63.255/#e-889de235ed8e1c2b","report_page":"https://rirtracker.com/arin/reports/2023-12-19/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.6.48.0-66.6.63.255.json","explanation":"ARIN's statistics show it reserved on 2023-12-18 and allocated (dated 2023-12-20), reserved on 2023-12-20. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2023-12-20: Remove 66.6.52.0-66.6.55.255; 2023-12-20: Remove 66.6.56.0-66.6.59.255; 2023-12-20: Add 66.6.52.0-66.6.55.255), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-December/005485.html","retrieved_at":"2026-10-12T18:42:25+00:00","summary":"ARIN-Issued report for 2023-12-19: \"Remove 66.6.48.0-66.6.63.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231218.gz","retrieved_at":"2026-10-12T23:32:10+00:00","summary":"ARIN delegated statistics 2023-12-18 (produced 2023-12-18T14:00:32+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20231220.gz","retrieved_at":"2026-10-12T23:32:15+00:00","summary":"ARIN delegated statistics 2023-12-20 (produced 2023-12-20T14:00:35+00:00), after the report: allocated (dated 2023-12-20), reserved"}]},{"event_id":"b649380f182981e6","registry":"ARIN","report_date":"2023-03-06","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"66.6.48.0/20","start":"66.6.48.0","end":"66.6.63.255","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":"2026-10-14T00:10:20+00:00","page":"https://rirtracker.com/ip/66.6.48.0-66.6.63.255/#e-b649380f182981e6","report_page":"https://rirtracker.com/arin/reports/2023-03-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.6.48.0-66.6.63.255.json","observed":"66.6.48.0/20 allocated on 2023-03-06, reserved on 2023-03-07","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":"2023-05-05","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 2004-02-24) on 2023-03-05 and reserved on 2023-03-07. 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 2023-05-05. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230307.gz","retrieved_at":"2026-10-12T23:16:56+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 66.6.48.0/20 allocated on 2023-03-06, reserved on 2023-03-07"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230305.gz","retrieved_at":"2026-10-12T23:16:52+00:00","summary":"ARIN delegated statistics 2023-03-05 (produced 2023-03-05T14:00:11+00:00), before the report: allocated (dated 2004-02-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230307.gz","retrieved_at":"2026-10-12T23:16:56+00:00","summary":"ARIN delegated statistics 2023-03-07 (produced 2023-03-07T14:00:11+00:00), after the report: reserved"}]},{"event_id":"65af760477d336bc","registry":"ARIN","report_date":"2013-10-23","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"66.6.48.0/20","start":"66.6.48.0","end":"66.6.63.255","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":"2026-10-13T23:58:33+00:00","page":"https://rirtracker.com/ip/66.6.48.0-66.6.63.255/#e-65af760477d336bc","report_page":"https://rirtracker.com/arin/reports/2013-10-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/66.6.48.0-66.6.63.255.json","observed":"66.6.48.0/20 assigned on 2013-10-23, reserved on 2013-10-24","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":"2013-12-22","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 2004-02-24) on 2013-10-22 and reserved on 2013-10-24. 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 2013-12-22. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20131024.gz","retrieved_at":"2026-10-12T20:06:33+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 66.6.48.0/20 assigned on 2013-10-23, reserved on 2013-10-24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20131022.gz","retrieved_at":"2026-10-12T20:06:28+00:00","summary":"ARIN delegated statistics 2013-10-22 (produced 2013-10-22T05:05:52+00:00), before the report: assigned (dated 2004-02-24)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-extended-20131024.gz","retrieved_at":"2026-10-12T20:06:33+00:00","summary":"ARIN delegated statistics 2013-10-24 (produced 2013-10-24T05:06:14+00:00), after the report: reserved"}]}],"classification_history":{"889de235ed8e1c2b":[{"raw_change_id":184608,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:00:39+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-12-18 and allocated (dated 2023-12-20), reserved on 2023-12-20. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2023-12-20: Remove 66.6.52.0-66.6.55.255; 2023-12-20: Add 66.6.52.0-66.6.55.255; 2023-12-20: Remove 66.6.56.0-66.6.59.255), so the before-and-after statistics may include it."},{"raw_change_id":184608,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:36+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-12-18 and allocated (dated 2023-12-20), reserved on 2023-12-20. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2023-12-20: Remove 66.6.52.0-66.6.55.255; 2023-12-20: Remove 66.6.56.0-66.6.59.255; 2023-12-20: Add 66.6.52.0-66.6.55.255), so the before-and-after statistics may include it."},{"raw_change_id":184608,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:27+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2023-12-18 and allocated (dated 2023-12-20), reserved on 2023-12-20. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2023-12-20: Remove 66.6.52.0-66.6.55.255; 2023-12-20: Remove 66.6.56.0-66.6.59.255; 2023-12-20: Add 66.6.52.0-66.6.55.255), so the before-and-after statistics may include it."},{"raw_change_id":184608,"classification_code":"POOL_RECORD_CHANGE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:54+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2023-12-18 and allocated (dated 2023-12-20), reserved on 2023-12-20. ARIN removed its own pool record for this range and the range is now registered, but the same report doesn't list it as added. Another change to this range was reported the day before or after (2023-12-20: Remove 66.6.52.0-66.6.55.255; 2023-12-20: Remove 66.6.56.0-66.6.59.255; 2023-12-20: Add 66.6.52.0-66.6.55.255), so the before-and-after statistics may include it."}],"b649380f182981e6":[{"raw_change_id":442284,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:57:19+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 allocated (dated 2004-02-24) on 2023-03-05 and reserved on 2023-03-07. 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 2023-05-05. This does not confirm availability."},{"raw_change_id":442284,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:21:26+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 allocated (dated 2004-02-24) on 2023-03-05 and reserved on 2023-03-07. 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 2023-05-05. This does not confirm availability."},{"raw_change_id":442284,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:05:24+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 allocated (dated 2004-02-24) on 2023-03-05 and reserved on 2023-03-07. 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 2023-05-05. This does not confirm availability."},{"raw_change_id":442284,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:10:20+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 2004-02-24) on 2023-03-05 and reserved on 2023-03-07. 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 2023-05-05. This does not confirm availability."}],"65af760477d336bc":[{"raw_change_id":264916,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:38:22+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 2004-02-24) on 2013-10-22 and reserved on 2013-10-24. 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 2013-12-22. This does not confirm availability."},{"raw_change_id":264916,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:11:32+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 2004-02-24) on 2013-10-22 and reserved on 2013-10-24. 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 2013-12-22. This does not confirm availability."},{"raw_change_id":264916,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:46+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 2004-02-24) on 2013-10-22 and reserved on 2013-10-24. 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 2013-12-22. This does not confirm availability."},{"raw_change_id":264916,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:58:33+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 2004-02-24) on 2013-10-22 and reserved on 2013-10-24. 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 2013-12-22. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2023-12-20), allocated (dated 2023-12-21), allocated (dated 2023-12-27)"}}