{"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":"203.57.51.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/203.57.51.0-203.57.51.255/","statistics_now":{"registry":"APNIC","status":"assigned (dated 1997-01-31)"},"current_holder":{"rir":"APNIC","org":"Mammoth Media Pty Ltd","how":"APNIC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":126628,"date":"2020-09-03T23:59:59Z","type":"RESOURCE_TRANSFER","source_rir":"APNIC","recipient_rir":"APNIC","source_org":"VOCUS PTY LTD","recipient_org":"Mammoth Media Pty Ltd","range":"203.57.51.0/24","log":"APNIC"}],"events":[{"event_id":"a5ebb34af597db2a","registry":"APNIC","report_date":"2020-09-04","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"203.57.51.0/24","start":"203.57.51.0","end":"203.57.51.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-APNIC transfer","confidence":"CONFIRMED","source_rir":"APNIC","recipient_rir":"APNIC","source_organization":"VOCUS PTY LTD","recipient_organization":"Mammoth Media Pty Ltd","inventory_effect":"No effect on APNIC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:39+00:00","page":"https://rirtracker.com/ip/203.57.51.0-203.57.51.255/#e-a5ebb34af597db2a","report_page":"https://rirtracker.com/apnic/reports/2020-09-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/203.57.51.0-203.57.51.255.json","observed":"Transfer: VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC)","piece_of":{"resource":"203.57.50.0/23","page":"https://rirtracker.com/ip/203.57.50.0-203.57.51.255/"},"explanation":"APNIC's transfer log records a transfer from VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC) on 2020-09-03 23:59 UTC. The registration changed hands; it is not a new allocation from APNIC.","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 2020-09-03 23:59 UTC, VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC); resources moved: 203.57.50.0/24, 203.57.51.0/24, 203.57.114.0/23"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200904.gz","retrieved_at":"2026-10-12T23:26:57+00:00","summary":"APNIC delegated statistics 2020-09-04, before the change: assigned (dated 1997-01-31)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2020/delegated-apnic-extended-20200905.gz","retrieved_at":"2026-10-12T23:27:01+00:00","summary":"APNIC delegated statistics 2020-09-05, after the change: assigned (dated 1997-01-31)"}]}],"classification_history":{"a5ebb34af597db2a":[{"raw_change_id":36682,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:23+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC) on 2020-09-03 23:59 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":36682,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:01:54+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC) on 2020-09-03 23:59 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":36682,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:05+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC) on 2020-09-03 23:59 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":36682,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:39+00:00","current":1,"public_explanation":"APNIC's transfer log records a transfer from VOCUS PTY LTD (APNIC) to Mammoth Media Pty Ltd (APNIC) on 2020-09-03 23:59 UTC. The registration changed hands; it is not a new allocation from APNIC."}]},"arin_statistics_now":{"status":"not listed"}}