{"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":"192.172.244.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/192.172.244.0-192.172.244.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-03-05)"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"be264a8e32b88d1b","registry":"ARIN","report_date":"2018-03-05","source":"arin_issued","raw_action":"ADD","raw_line":"Add 192.172.244.0-192.172.244.255","resource_type":"ipv4","resource":"192.172.244.0/24","start":"192.172.244.0","end":"192.172.244.255","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 ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:06+00:00","page":"https://rirtracker.com/ip/192.172.244.0-192.172.244.255/#e-be264a8e32b88d1b","report_page":"https://rirtracker.com/arin/reports/2018-03-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/192.172.244.0-192.172.244.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-March/003372.html","retrieved_at":"2026-10-12T18:39:59+00:00","summary":"ARIN-Issued report for 2018-03-05: \"Add 192.172.244.0-192.172.244.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180304.gz","retrieved_at":"2026-10-12T21:42:44+00:00","summary":"ARIN delegated statistics 2018-03-04 (produced 2018-03-04T06:11:33+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180306.gz","retrieved_at":"2026-10-12T21:42:48+00:00","summary":"ARIN delegated statistics 2018-03-06 (produced 2018-03-06T06:12:40+00:00), after the report: assigned (dated 2018-03-05)"}]},{"event_id":"2f00a6b18fc2948f","registry":"ARIN","report_date":"2018-03-05","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 192.172.244.0-192.172.244.255","resource_type":"ipv4","resource":"192.172.244.0/24","start":"192.172.244.0","end":"192.172.244.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:06+00:00","page":"https://rirtracker.com/ip/192.172.244.0-192.172.244.255/#e-2f00a6b18fc2948f","report_page":"https://rirtracker.com/arin/reports/2018-03-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/192.172.244.0-192.172.244.255.json","explanation":"ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.172.244.0-192.172.244.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-March/003372.html","retrieved_at":"2026-10-12T18:39:59+00:00","summary":"ARIN-Issued report for 2018-03-05: \"Remove 192.172.244.0-192.172.244.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180304.gz","retrieved_at":"2026-10-12T21:42:44+00:00","summary":"ARIN delegated statistics 2018-03-04 (produced 2018-03-04T06:11:33+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180306.gz","retrieved_at":"2026-10-12T21:42:48+00:00","summary":"ARIN delegated statistics 2018-03-06 (produced 2018-03-06T06:12:40+00:00), after the report: assigned (dated 2018-03-05)"}]},{"event_id":"71b6eabe61e4bc32","registry":"APNIC","report_date":"2010-12-21","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"192.172.244.0/24","start":"192.172.244.0","end":"192.172.244.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"OBSERVED_ONLY","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":"2026-10-13T23:56:53+00:00","page":"https://rirtracker.com/ip/192.172.244.0-192.172.244.255/#e-71b6eabe61e4bc32","report_page":"https://rirtracker.com/apnic/reports/2010-12-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/192.172.244.0-192.172.244.255.json","observed":"192.172.244.0/24 allocated on 2010-12-21, not listed on 2010-12-22","explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2007-10-26) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, and its statistics show a steady one (a year) only for removals from 2014-07-01 on; this one came earlier, so the tracker gives no estimate. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101222.gz","retrieved_at":"2026-10-12T19:30:01+00:00","summary":"Found by comparing APNIC's daily statistics: 192.172.244.0/24 allocated on 2010-12-21, not listed on 2010-12-22"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101221.gz","retrieved_at":"2026-10-12T19:29:57+00:00","summary":"APNIC delegated statistics 2010-12-21, before the change: allocated (dated 2007-10-26)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2010/delegated-apnic-extended-20101222.gz","retrieved_at":"2026-10-12T19:30:01+00:00","summary":"APNIC delegated statistics 2010-12-22, after the change: not listed"}]}],"classification_history":{"be264a8e32b88d1b":[{"raw_change_id":153545,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:38+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. The tracker saw this range released from hold on 2011-06-06 (69.57.208.0-216.250.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153545,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:14+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. The tracker saw this range released from hold on 2011-06-06 (69.57.208.0-216.250.127.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153545,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:55+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":153545,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:06+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}],"2f00a6b18fc2948f":[{"raw_change_id":153538,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:38+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.172.244.0-192.172.244.255. The issuance is explained on that line."},{"raw_change_id":153538,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:14+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.172.244.0-192.172.244.255. The issuance is explained on that line."},{"raw_change_id":153538,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:55+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.172.244.0-192.172.244.255. The issuance is explained on that line."},{"raw_change_id":153538,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:06+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2018-03-04 and assigned (dated 2018-03-05) on 2018-03-06. ARIN removed its own pool record for this range as part of issuing it: the same report adds 192.172.244.0-192.172.244.255. The issuance is explained on that line."}],"71b6eabe61e4bc32":[{"raw_change_id":236204,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T04:22:54+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2007-10-26) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":236204,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:10:05+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2007-10-26) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":236204,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:53:11+00:00","current":0,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2007-10-26) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no fixed period for which it holds returned IPv4 space before reissuing it, so the tracker gives no estimate. This does not confirm availability."},{"raw_change_id":236204,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:56:53+00:00","current":1,"public_explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2007-10-26) on 2010-12-21 and not listed on 2010-12-22. Being gone from APNIC's statistics entirely can also mean it moved to another registry. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, and its statistics show a steady one (a year) only for removals from 2014-07-01 on; this one came earlier, so the tracker gives no estimate. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2018-03-05)"}}