{"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":"216.243.240.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/216.243.240.0-216.243.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2010-12-03)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"e295a191ddec50a4","registry":"ARIN","report_date":"2010-12-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 216.243.240.0-216.243.255.255","resource_type":"ipv4","resource":"216.243.240.0/20","start":"216.243.240.0","end":"216.243.255.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"OBSERVED_ONLY","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":"1.4.0","classified_at":"2026-10-13T23:50:50+00:00","page":"https://rirtracker.com/ip/216.243.240.0-216.243.255.255/#e-e295a191ddec50a4","report_page":"https://rirtracker.com/arin/reports/2010-12-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.243.240.0-216.243.255.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-12-02 and allocated (dated 2010-12-03) on 2010-12-04. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (216.243.240.0-216.243.255.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2010-12-02: Remove 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-December/000718.html","retrieved_at":"2026-10-12T18:36:55+00:00","summary":"ARIN-Issued report for 2010-12-03: \"Add 216.243.240.0-216.243.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101202.gz","retrieved_at":"2026-10-12T19:13:29+00:00","summary":"ARIN delegated statistics 2010-12-02, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101204.gz","retrieved_at":"2026-10-12T19:13:37+00:00","summary":"ARIN delegated statistics 2010-12-04, after the report: allocated (dated 2010-12-03)"}]},{"event_id":"394654d626f77d04","registry":"ARIN","report_date":"2010-12-02","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 216.243.240.0-216.243.255.255","resource_type":"ipv4","resource":"216.243.240.0/20","start":"216.243.240.0","end":"216.243.255.255","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":"2026-10-13T23:50:50+00:00","page":"https://rirtracker.com/ip/216.243.240.0-216.243.255.255/#e-394654d626f77d04","report_page":"https://rirtracker.com/arin/reports/2010-12-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.243.240.0-216.243.255.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (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 (2010-12-03: Add 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-December/000717.html","retrieved_at":"2026-10-12T18:36:55+00:00","summary":"ARIN-Issued report for 2010-12-02: \"Remove 216.243.240.0-216.243.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101201.gz","retrieved_at":"2026-10-12T19:13:27+00:00","summary":"ARIN delegated statistics 2010-12-01, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20101203.gz","retrieved_at":"2026-10-12T19:13:34+00:00","summary":"ARIN delegated statistics 2010-12-03, after the report: not issued"}]},{"event_id":"0637325d960c2a0e","registry":"ARIN","report_date":"2010-01-06","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"216.243.240.0/20","start":"216.243.240.0","end":"216.243.255.255","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":"2026-10-13T23:55:32+00:00","page":"https://rirtracker.com/ip/216.243.240.0-216.243.255.255/#e-0637325d960c2a0e","report_page":"https://rirtracker.com/arin/reports/2010-01-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/216.243.240.0-216.243.255.255.json","observed":"216.243.240.0/20 assigned on 2010-01-06, not listed on 2010-01-07","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":"2010-03-07","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 2003-04-10) on 2010-01-05 and not issued on 2010-01-07. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100107.gz","retrieved_at":"2026-10-12T18:59:52+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 216.243.240.0/20 assigned on 2010-01-06, not listed on 2010-01-07"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100105.gz","retrieved_at":"2026-10-12T18:59:48+00:00","summary":"ARIN delegated statistics 2010-01-05, before the report: assigned (dated 2003-04-10)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100107.gz","retrieved_at":"2026-10-12T18:59:52+00:00","summary":"ARIN delegated statistics 2010-01-07, after the report: not issued"}]}],"classification_history":{"e295a191ddec50a4":[{"raw_change_id":122250,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:59+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-12-02 and allocated (dated 2010-12-03) on 2010-12-04. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (216.243.240.0-216.243.255.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2010-12-02: Remove 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122250,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:18+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-12-02 and allocated (dated 2010-12-03) on 2010-12-04. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (216.243.240.0-216.243.255.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2010-12-02: Remove 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122250,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:51+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-12-02 and allocated (dated 2010-12-03) on 2010-12-04. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (216.243.240.0-216.243.255.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2010-12-02: Remove 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122250,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:50+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-12-02 and allocated (dated 2010-12-03) on 2010-12-04. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-12-02 (216.243.240.0-216.243.255.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2010-12-02: Remove 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."}],"394654d626f77d04":[{"raw_change_id":122154,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:54+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (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 (2010-12-03: Add 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122154,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:17+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (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 (2010-12-03: Add 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122154,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:51+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (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 (2010-12-03: Add 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."},{"raw_change_id":122154,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:50+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-12-01 and not issued on 2010-12-03. (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 (2010-12-03: Add 216.243.240.0-216.243.255.255), so the before-and-after statistics may include it."}],"0637325d960c2a0e":[{"raw_change_id":213418,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:13:46+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 2003-04-10) on 2010-01-05 and not issued on 2010-01-07. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-07. This does not confirm availability."},{"raw_change_id":213418,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:55+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 2003-04-10) on 2010-01-05 and not issued on 2010-01-07. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-07. This does not confirm availability."},{"raw_change_id":213418,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:55+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 2003-04-10) on 2010-01-05 and not issued on 2010-01-07. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-07. This does not confirm availability."},{"raw_change_id":213418,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:32+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 2003-04-10) on 2010-01-05 and not issued on 2010-01-07. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2010-03-07. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2010-12-03)"}}