{"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":"131.100.28.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/131.100.28.0-131.100.31.255/","statistics_now":{"registry":"LACNIC","status":"allocated (dated 2024-06-04)"},"current_holder":{"rir":"LACNIC","org":null,"how":"LACNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"af17744448aa4de7","registry":"LACNIC","report_date":"2024-06-04","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"131.100.28.0/22","start":"131.100.28.0","end":"131.100.31.255","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 LACNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:59+00:00","page":"https://rirtracker.com/ip/131.100.28.0-131.100.31.255/#e-af17744448aa4de7","report_page":"https://rirtracker.com/lacnic/reports/2024-06-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.100.28.0-131.100.31.255.json","observed":"131.100.28.0/22 reserved on 2024-06-03, allocated on 2024-06-04","explanation":"No transfer record matches. LACNIC's statistics show it reserved on 2024-06-03 and allocated (dated 2024-06-04) on 2024-06-04. The tracker saw this range removed from registration on 2023-11-06 (131.100.28.0/22), so it appears to have been issued again from LACNIC's pool.","evidence":[{"type":"statistics_diff","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2024/delegated-lacnic-extended-20240604","retrieved_at":"2026-10-13T01:37:48+00:00","summary":"Found by comparing LACNIC's daily statistics: 131.100.28.0/22 reserved on 2024-06-03, allocated on 2024-06-04"},{"type":"delegated_before","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2024/delegated-lacnic-extended-20240603","retrieved_at":"2026-10-13T01:37:36+00:00","summary":"LACNIC delegated statistics 2024-06-03, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2024/delegated-lacnic-extended-20240604","retrieved_at":"2026-10-13T01:37:48+00:00","summary":"LACNIC delegated statistics 2024-06-04, after the change: allocated (dated 2024-06-04)"}]},{"event_id":"9c5714ac722d979b","registry":"LACNIC","report_date":"2023-11-06","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"131.100.28.0/22","start":"131.100.28.0","end":"131.100.31.255","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":"2026-10-14T00:17:38+00:00","page":"https://rirtracker.com/ip/131.100.28.0-131.100.31.255/#e-9c5714ac722d979b","report_page":"https://rirtracker.com/lacnic/reports/2023-11-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.100.28.0-131.100.31.255.json","observed":"131.100.28.0/22 allocated on 2023-11-05, reserved on 2023-11-06","hold":{"hold_rule_source_url":"https://www.lacnic.net/1077/1/lacnic","hold_rule_months":6,"estimated_hold_end":"2024-05-06","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-08-08) on 2023-11-05 and reserved on 2023-11-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the estimated hold end is 2024-05-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2023/delegated-lacnic-extended-20231106","retrieved_at":"2026-10-13T01:19:08+00:00","summary":"Found by comparing LACNIC's daily statistics: 131.100.28.0/22 allocated on 2023-11-05, reserved on 2023-11-06"},{"type":"delegated_before","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2023/delegated-lacnic-extended-20231105","retrieved_at":"2026-10-13T01:19:04+00:00","summary":"LACNIC delegated statistics 2023-11-05, before the change: allocated (dated 2014-08-08)"},{"type":"delegated_after","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2023/delegated-lacnic-extended-20231106","retrieved_at":"2026-10-13T01:19:08+00:00","summary":"LACNIC delegated statistics 2023-11-06, after the change: reserved"}]},{"event_id":"44b2c7ba616ae84e","registry":"LACNIC","report_date":"2014-08-08","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"131.100.28.0/22","start":"131.100.28.0","end":"131.100.31.255","classification":"APPARENT_NEW_ISSUANCE","classification_label":"Apparent new issuance","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from LACNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:59:20+00:00","page":"https://rirtracker.com/ip/131.100.28.0-131.100.31.255/#e-44b2c7ba616ae84e","report_page":"https://rirtracker.com/lacnic/reports/2014-08-08/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/131.100.28.0-131.100.31.255.json","observed":"131.100.28.0/22 available on 2014-08-07, allocated on 2014-08-08","explanation":"No transfer record matches. LACNIC's statistics show it available on 2014-08-07 and allocated (dated 2014-08-08) on 2014-08-08. It moved from LACNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by LACNIC.","evidence":[{"type":"statistics_diff","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2014/delegated-lacnic-extended-20140808","retrieved_at":"2026-10-12T20:17:42+00:00","summary":"Found by comparing LACNIC's daily statistics: 131.100.28.0/22 available on 2014-08-07, allocated on 2014-08-08"},{"type":"delegated_before","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2014/delegated-lacnic-extended-20140807","retrieved_at":"2026-10-12T20:17:38+00:00","summary":"LACNIC delegated statistics 2014-08-07, before the change: available"},{"type":"delegated_after","url":"https://ftp.lacnic.net/pub/stats/lacnic/archive/2014/delegated-lacnic-extended-20140808","retrieved_at":"2026-10-12T20:17:42+00:00","summary":"LACNIC delegated statistics 2014-08-08, after the change: allocated (dated 2014-08-08)"}]}],"classification_history":{"af17744448aa4de7":[{"raw_change_id":541525,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:44:45+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it reserved on 2024-06-03 and allocated (dated 2024-06-04) on 2024-06-04. The tracker saw this range removed from registration on 2023-11-06 (131.100.28.0/22), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":541525,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:27:32+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it reserved on 2024-06-03 and allocated (dated 2024-06-04) on 2024-06-04. The tracker saw this range removed from registration on 2023-11-06 (131.100.28.0/22), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":541525,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:11:58+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it reserved on 2024-06-03 and allocated (dated 2024-06-04) on 2024-06-04. The tracker saw this range removed from registration on 2023-11-06 (131.100.28.0/22), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":541525,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:59+00:00","current":1,"public_explanation":"No transfer record matches. LACNIC's statistics show it reserved on 2024-06-03 and allocated (dated 2024-06-04) on 2024-06-04. The tracker saw this range removed from registration on 2023-11-06 (131.100.28.0/22), so it appears to have been issued again from LACNIC's pool."}],"9c5714ac722d979b":[{"raw_change_id":535067,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:41:32+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-08-08) on 2023-11-05 and reserved on 2023-11-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2024-05-06. This does not confirm availability."},{"raw_change_id":535067,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:27:14+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-08-08) on 2023-11-05 and reserved on 2023-11-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2024-05-06. This does not confirm availability."},{"raw_change_id":535067,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:11:38+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-08-08) on 2023-11-05 and reserved on 2023-11-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2024-05-06. This does not confirm availability."},{"raw_change_id":535067,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:17:38+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing LACNIC's daily statistics. LACNIC's statistics show it allocated (dated 2014-08-08) on 2023-11-05 and reserved on 2023-11-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. LACNIC holds returned, revoked and reclaimed IPv4 space for 6 calendar months before reissuing it, so the estimated hold end is 2024-05-06. This does not confirm availability."}],"44b2c7ba616ae84e":[{"raw_change_id":277831,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:45:15+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it available on 2014-08-07 and allocated (dated 2014-08-08) on 2014-08-08. The tracker saw this range released from hold on 2014-04-23 (131.100.0.0/16), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":277831,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:12:14+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it available on 2014-08-07 and allocated (dated 2014-08-08) on 2014-08-08. The tracker saw this range released from hold on 2014-04-23 (131.100.0.0/16), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":277831,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:55:31+00:00","current":0,"public_explanation":"No transfer record matches. LACNIC's statistics show it available on 2014-08-07 and allocated (dated 2014-08-08) on 2014-08-08. The tracker saw this range released from hold on 2014-04-23 (131.100.0.0/16), so it appears to have been issued again from LACNIC's pool."},{"raw_change_id":277831,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:59:20+00:00","current":1,"public_explanation":"No transfer record matches. LACNIC's statistics show it available on 2014-08-07 and allocated (dated 2014-08-08) on 2014-08-08. It moved from LACNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by LACNIC."}]},"arin_statistics_now":{"status":"not listed"}}