{"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":"203.147.144.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/203.147.144.0-203.147.159.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2024-05-22)"},"current_holder":{"rir":"ARIN","org":"ORACLE-4","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":129391,"date":"2024-05-23T00:06:40Z","type":"RESOURCE_TRANSFER","source_rir":"APNIC","recipient_rir":"ARIN","source_org":"NCS AU Pty Ltd","recipient_org":"ORACLE-4","range":"203.147.144.0/20","log":"APNIC"},{"id":35654,"date":"2024-05-22T13:50:16Z","type":"RESOURCE_TRANSFER","source_rir":"APNIC","recipient_rir":"ARIN","source_org":"Arq Group Enterprise Pty Ltd","recipient_org":"Oracle Corporation","range":"203.147.144.0/20","log":"ARIN"}],"events":[{"event_id":"79e8b892e5ec0a37","registry":"APNIC","report_date":"2024-05-23","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"203.147.144.0/20","start":"203.147.144.0","end":"203.147.159.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of APNIC","confidence":"CONFIRMED","source_rir":"APNIC","recipient_rir":"ARIN","source_organization":"NCS AU Pty Ltd","recipient_organization":"ORACLE-4","inventory_effect":"Transferred out of APNIC administration; not offered to APNIC applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:51+00:00","page":"https://rirtracker.com/ip/203.147.144.0-203.147.159.255/#e-79e8b892e5ec0a37","report_page":"https://rirtracker.com/apnic/reports/2024-05-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/203.147.144.0-203.147.159.255.json","observed":"Transfer: NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN)","same_transfer_as":"5582edb4ebdb633d","explanation":"APNIC's transfer log records a transfer from NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN) on 2024-05-23 00:06 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants.","evidence":[{"type":"transfer","url":"https://ftp.apnic.net/stats/apnic/transfers/transfers_latest.json","retrieved_at":"2026-10-13T18:17:16+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2024-05-23 00:06 UTC, NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN); resources moved: 203.147.144.0/20"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240523.gz","retrieved_at":"2026-10-13T01:09:38+00:00","summary":"APNIC delegated statistics 2024-05-23, before the change: allocated (dated 2000-09-27)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2024/delegated-apnic-extended-20240524.gz","retrieved_at":"2026-10-13T01:09:42+00:00","summary":"APNIC delegated statistics 2024-05-24, after the change: not listed"}]},{"event_id":"5582edb4ebdb633d","registry":"ARIN","report_date":"2024-05-22","source":"arin_issued","raw_action":"ADD","raw_line":"Add 203.147.144.0-203.147.159.255","resource_type":"ipv4","resource":"203.147.144.0/20","start":"203.147.144.0","end":"203.147.159.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into ARIN","confidence":"CONFIRMED","source_rir":"APNIC","recipient_rir":"ARIN","source_organization":"Arq Group Enterprise Pty Ltd","recipient_organization":"Oracle Corporation","inventory_effect":"Transferred into ARIN administration; not a new issuance","inventory_effect_code":"TRANSFER_IN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:05+00:00","page":"https://rirtracker.com/ip/203.147.144.0-203.147.159.255/#e-5582edb4ebdb633d","report_page":"https://rirtracker.com/arin/reports/2024-05-22/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/203.147.144.0-203.147.159.255.json","same_transfer_as":"79e8b892e5ec0a37","explanation":"ARIN's transfer log records a transfer from Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN) on 2024-05-22 13:50 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2024-May/005640.html","retrieved_at":"2026-10-12T18:42:35+00:00","summary":"ARIN-Issued report for 2024-05-22: \"Add 203.147.144.0-203.147.159.255\""},{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-13T13:57:20+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2024-05-22 13:50 UTC, Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN); resources moved: 203.147.144.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240521.gz","retrieved_at":"2026-10-12T23:40:23+00:00","summary":"ARIN delegated statistics 2024-05-21 (produced 2024-05-21T13:00:47+00:00), before the report: not listed"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240523.gz","retrieved_at":"2026-10-12T23:40:28+00:00","summary":"ARIN delegated statistics 2024-05-23 (produced 2024-05-23T13:00:47+00:00), after the report: allocated (dated 2024-05-22)"}]}],"classification_history":{"79e8b892e5ec0a37":[{"raw_change_id":40899,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:38:09+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN) on 2024-05-23 00:06 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants."},{"raw_change_id":40899,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:02:03+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN) on 2024-05-23 00:06 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants."},{"raw_change_id":40899,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:15+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN) on 2024-05-23 00:06 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants."},{"raw_change_id":40899,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:51+00:00","current":1,"public_explanation":"APNIC's transfer log records a transfer from NCS AU Pty Ltd (APNIC) to ORACLE-4 (ARIN) on 2024-05-23 00:06 UTC: it left APNIC for ARIN. It is not a new allocation and is not offered to APNIC applicants."}],"5582edb4ebdb633d":[{"raw_change_id":187365,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T04:02:18+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN) on 2024-05-22 13:50 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":187365,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:43+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN) on 2024-05-22 13:50 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":187365,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:35+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN) on 2024-05-22 13:50 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":187365,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:05+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Arq Group Enterprise Pty Ltd (APNIC) to Oracle Corporation (ARIN) on 2024-05-22 13:50 UTC: it came to ARIN from APNIC. It was already issued by another registry, so this is not a new issuance."}]},"arin_statistics_now":{"status":"allocated (dated 2024-05-22)"}}