{"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":"103.57.144.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/103.57.144.0-103.57.147.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 2015-05-21)"},"current_holder":{"rir":"APNIC","org":null,"how":"APNIC's latest statistics"},"rdap_snapshots":[],"transfers":[],"events":[{"event_id":"8e30507ceb3cb5b9","registry":"APNIC","report_date":"2015-05-21","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"103.57.144.0/22","start":"103.57.144.0","end":"103.57.147.255","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 APNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:22+00:00","page":"https://rirtracker.com/ip/103.57.144.0-103.57.147.255/#e-8e30507ceb3cb5b9","report_page":"https://rirtracker.com/apnic/reports/2015-05-21/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/103.57.144.0-103.57.147.255.json","observed":"103.57.144.0/22 reserved on 2015-05-21, allocated on 2015-05-22","explanation":"No transfer record matches. APNIC's statistics show it reserved on 2015-05-21 and allocated (dated 2015-05-21) on 2015-05-22. The tracker saw this range removed from registration on 2015-05-20 (103.57.144.0/22), so it appears to have been issued again from APNIC's pool. Another change to this range was reported the day before or after (2015-05-20: Removed 103.57.144.0/22), so the before-and-after statistics may include it.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150522.gz","retrieved_at":"2026-10-12T21:16:45+00:00","summary":"Found by comparing APNIC's daily statistics: 103.57.144.0/22 reserved on 2015-05-21, allocated on 2015-05-22"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150521.gz","retrieved_at":"2026-10-12T21:16:41+00:00","summary":"APNIC delegated statistics 2015-05-21, before the change: reserved"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150522.gz","retrieved_at":"2026-10-12T21:16:45+00:00","summary":"APNIC delegated statistics 2015-05-22, after the change: allocated (dated 2015-05-21)"}]},{"event_id":"e0c597332e36458a","registry":"APNIC","report_date":"2015-05-20","source":"statistics","raw_action":"REMOVED","raw_line":null,"resource_type":"ipv4","resource":"103.57.144.0/22","start":"103.57.144.0","end":"103.57.147.255","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":"2026-10-14T00:02:22+00:00","page":"https://rirtracker.com/ip/103.57.144.0-103.57.147.255/#e-e0c597332e36458a","report_page":"https://rirtracker.com/apnic/reports/2015-05-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/103.57.144.0-103.57.147.255.json","observed":"103.57.144.0/22 allocated on 2015-05-20, reserved on 2015-05-21","hold":{"hold_rule_source_url":"https://www.apnic.net/manage-ip/manage-resources/address-status","hold_rule_months":12,"estimated_hold_end":"2016-05-20","availability_statement":"Possible reissue candidate after this date; not confirmed available","hold_rule_observed":true},"explanation":"Removed from active registration. The tracker found it by comparing APNIC's daily statistics. APNIC's statistics show it allocated (dated 2015-05-18) on 2015-05-20 and reserved on 2015-05-21. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2016-05-20. That is what APNIC has done, not a rule it states. This does not confirm availability. Another change to this range was reported the day before or after (2015-05-21: Added 103.57.144.0/22), so the before-and-after statistics may include it.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150521.gz","retrieved_at":"2026-10-12T21:16:41+00:00","summary":"Found by comparing APNIC's daily statistics: 103.57.144.0/22 allocated on 2015-05-20, reserved on 2015-05-21"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150520.gz","retrieved_at":"2026-10-12T21:16:38+00:00","summary":"APNIC delegated statistics 2015-05-20, before the change: allocated (dated 2015-05-18)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150521.gz","retrieved_at":"2026-10-12T21:16:41+00:00","summary":"APNIC delegated statistics 2015-05-21, after the change: reserved"}]},{"event_id":"aa30a280891597b4","registry":"APNIC","report_date":"2015-05-18","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"103.57.144.0/22","start":"103.57.144.0","end":"103.57.147.255","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 APNIC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:21+00:00","page":"https://rirtracker.com/ip/103.57.144.0-103.57.147.255/#e-aa30a280891597b4","report_page":"https://rirtracker.com/apnic/reports/2015-05-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/103.57.144.0-103.57.147.255.json","observed":"103.57.144.0/22 available on 2015-05-18, allocated on 2015-05-19","explanation":"No transfer record matches. APNIC's statistics show it available on 2015-05-18 and allocated (dated 2015-05-18) on 2015-05-19. It moved from APNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by APNIC.","evidence":[{"type":"statistics_diff","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150519.gz","retrieved_at":"2026-10-12T21:16:31+00:00","summary":"Found by comparing APNIC's daily statistics: 103.57.144.0/22 available on 2015-05-18, allocated on 2015-05-19"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150518.gz","retrieved_at":"2026-10-12T21:16:27+00:00","summary":"APNIC delegated statistics 2015-05-18, before the change: available"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2015/delegated-apnic-extended-20150519.gz","retrieved_at":"2026-10-12T21:16:31+00:00","summary":"APNIC delegated statistics 2015-05-19, after the change: allocated (dated 2015-05-18)"}]}],"classification_history":{"8e30507ceb3cb5b9":[{"raw_change_id":323733,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T05:06:35+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2015-05-21 and allocated (dated 2015-05-21) on 2015-05-22. The tracker saw this range removed from registration on 2015-05-20 (103.57.144.0/22), so it appears to have been issued again from APNIC's pool. Another change to this range was reported the day before or after (2015-05-20: Removed 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323733,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:49+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2015-05-21 and allocated (dated 2015-05-21) on 2015-05-22. The tracker saw this range removed from registration on 2015-05-20 (103.57.144.0/22), so it appears to have been issued again from APNIC's pool. Another change to this range was reported the day before or after (2015-05-20: Removed 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323733,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:58:18+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2015-05-21 and allocated (dated 2015-05-21) on 2015-05-22. The tracker saw this range removed from registration on 2015-05-20 (103.57.144.0/22), so it appears to have been issued again from APNIC's pool. Another change to this range was reported the day before or after (2015-05-20: Removed 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323733,"classification_code":"APPARENT_REISSUANCE","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:22+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it reserved on 2015-05-21 and allocated (dated 2015-05-21) on 2015-05-22. The tracker saw this range removed from registration on 2015-05-20 (103.57.144.0/22), so it appears to have been issued again from APNIC's pool. Another change to this range was reported the day before or after (2015-05-20: Removed 103.57.144.0/22), so the before-and-after statistics may include it."}],"e0c597332e36458a":[{"raw_change_id":323678,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T05:06:34+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 2015-05-18) on 2015-05-20 and reserved on 2015-05-21. 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. Another change to this range was reported the day before or after (2015-05-21: Added 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323678,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:49+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 2015-05-18) on 2015-05-20 and reserved on 2015-05-21. 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. Another change to this range was reported the day before or after (2015-05-21: Added 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323678,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:58:18+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 2015-05-18) on 2015-05-20 and reserved on 2015-05-21. 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. Another change to this range was reported the day before or after (2015-05-21: Added 103.57.144.0/22), so the before-and-after statistics may include it."},{"raw_change_id":323678,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:22+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 2015-05-18) on 2015-05-20 and reserved on 2015-05-21. Public sources do not distinguish a voluntary return, revocation, or reclamation. APNIC publishes no hold period, but its statistics have released returned IPv4 space a year after the removal or later since 2014, so the tracker estimates the hold ends on 2016-05-20. That is what APNIC has done, not a rule it states. This does not confirm availability. Another change to this range was reported the day before or after (2015-05-21: Added 103.57.144.0/22), so the before-and-after statistics may include it."}],"aa30a280891597b4":[{"raw_change_id":323651,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:06:34+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2015-05-18 and allocated (dated 2015-05-18) on 2015-05-19. It moved from APNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by APNIC."},{"raw_change_id":323651,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:49+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2015-05-18 and allocated (dated 2015-05-18) on 2015-05-19. It moved from APNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by APNIC."},{"raw_change_id":323651,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:58:18+00:00","current":0,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2015-05-18 and allocated (dated 2015-05-18) on 2015-05-19. It moved from APNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by APNIC."},{"raw_change_id":323651,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:02:21+00:00","current":1,"public_explanation":"No transfer record matches. APNIC's statistics show it available on 2015-05-18 and allocated (dated 2015-05-18) on 2015-05-19. It moved from APNIC's unissued pool to an active registration dated around that day, so it appears to be newly issued by APNIC."}]},"arin_statistics_now":{"status":"not listed"}}