{"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":"129.227.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/129.227.0.0-129.227.255.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 1988-03-07)"},"current_holder":{"rir":"APNIC","org":"Zenlayer (Singapore) PTE. LTD","how":"APNIC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":126228,"date":"2019-08-15T03:41:52Z","type":"RESOURCE_TRANSFER","source_rir":"APNIC","recipient_rir":"APNIC","source_org":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","recipient_org":"Zenlayer (Singapore) PTE. LTD","range":"129.227.0.0/16","log":"APNIC"},{"id":18317,"date":"2019-06-26T11:30:23Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"Unisys Corporation","recipient_org":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","range":"129.227.0.0/16","log":"ARIN"},{"id":126173,"date":"2019-06-26T07:49:00Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"UNISYS-2","recipient_org":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","range":"129.227.0.0/16","log":"APNIC"}],"events":[{"event_id":"327cd9ccdc0962a8","registry":"APNIC","report_date":"2019-08-15","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"129.227.0.0/16","start":"129.227.0.0","end":"129.227.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-APNIC transfer","confidence":"CONFIRMED","source_rir":"APNIC","recipient_rir":"APNIC","source_organization":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","recipient_organization":"Zenlayer (Singapore) PTE. LTD","inventory_effect":"No effect on APNIC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","page":"https://rirtracker.com/ip/129.227.0.0-129.227.255.255/#e-327cd9ccdc0962a8","report_page":"https://rirtracker.com/apnic/reports/2019-08-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/129.227.0.0-129.227.255.255.json","observed":"Transfer: Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC)","explanation":"APNIC's transfer log records a transfer from Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC) on 2019-08-15 03:41 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 2019-08-15 03:41 UTC, Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC); resources moved: 36.255.220.0/22, 129.227.0.0/16"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190815.gz","retrieved_at":"2026-10-12T22:58:55+00:00","summary":"APNIC delegated statistics 2019-08-15, before the change: allocated (dated 1988-03-07)"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190816.gz","retrieved_at":"2026-10-12T22:58:59+00:00","summary":"APNIC delegated statistics 2019-08-16, after the change: allocated (dated 1988-03-07)"}]},{"event_id":"18e1ca2df2709d6e","registry":"APNIC","report_date":"2019-06-26","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"129.227.0.0/16","start":"129.227.0.0","end":"129.227.255.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into APNIC","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"UNISYS-2","recipient_organization":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","inventory_effect":"Transferred into APNIC administration; not a new issuance","inventory_effect_code":"TRANSFER_IN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","page":"https://rirtracker.com/ip/129.227.0.0-129.227.255.255/#e-18e1ca2df2709d6e","report_page":"https://rirtracker.com/apnic/reports/2019-06-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/129.227.0.0-129.227.255.255.json","observed":"Transfer: UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC)","same_transfer_as":"69957d8812e4aafd","explanation":"APNIC's transfer log records a transfer from UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 07:49 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance.","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 2019-06-26 07:49 UTC, UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC); resources moved: 129.227.0.0/16"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190626.gz","retrieved_at":"2026-10-12T22:55:33+00:00","summary":"APNIC delegated statistics 2019-06-26, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190627.gz","retrieved_at":"2026-10-12T22:55:37+00:00","summary":"APNIC delegated statistics 2019-06-27, after the change: allocated (dated 1988-03-07)"}]},{"event_id":"69957d8812e4aafd","registry":"ARIN","report_date":"2019-06-25","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"129.227.0.0/16","start":"129.227.0.0","end":"129.227.255.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"Unisys Corporation","recipient_organization":"Zenlayer Network Technologies (Shanghai) Co. Ltd.","inventory_effect":"Transferred out of ARIN administration; not offered to ARIN applicants","inventory_effect_code":"TRANSFER_OUT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:42+00:00","page":"https://rirtracker.com/ip/129.227.0.0-129.227.255.255/#e-69957d8812e4aafd","report_page":"https://rirtracker.com/arin/reports/2019-06-25/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/129.227.0.0-129.227.255.255.json","observed":"129.227.0.0/16 assigned on 2019-06-25, not listed on 2019-06-26","same_transfer_as":"18e1ca2df2709d6e","explanation":"ARIN's transfer log records a transfer from Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 11:30 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190626.gz","retrieved_at":"2026-10-12T22:07:11+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 129.227.0.0/16 assigned on 2019-06-25, not listed on 2019-06-26"},{"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 2019-06-26 11:30 UTC, Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC); resources moved: 129.227.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190624.gz","retrieved_at":"2026-10-12T22:07:07+00:00","summary":"ARIN delegated statistics 2019-06-24 (produced 2019-06-24T14:00:16+00:00), before the report: assigned (dated 1988-03-07)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190626.gz","retrieved_at":"2026-10-12T22:07:11+00:00","summary":"ARIN delegated statistics 2019-06-26 (produced 2019-06-26T14:00:15+00:00), after the report: not listed"}]}],"classification_history":{"327cd9ccdc0962a8":[{"raw_change_id":35984,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:03+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC) on 2019-08-15 03:41 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":35984,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:01:53+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC) on 2019-08-15 03:41 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":35984,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:03+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC) on 2019-08-15 03:41 UTC. The registration changed hands; it is not a new allocation from APNIC."},{"raw_change_id":35984,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","current":1,"public_explanation":"APNIC's transfer log records a transfer from Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) to Zenlayer (Singapore) PTE. LTD (APNIC) on 2019-08-15 03:41 UTC. The registration changed hands; it is not a new allocation from APNIC."}],"18e1ca2df2709d6e":[{"raw_change_id":35887,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:00+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 07:49 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35887,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:01:53+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 07:49 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35887,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:44:03+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 07:49 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35887,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:46:38+00:00","current":1,"public_explanation":"APNIC's transfer log records a transfer from UNISYS-2 (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 07:49 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."}],"69957d8812e4aafd":[{"raw_change_id":376051,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T05:30:36+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 11:30 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":376051,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:35+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 11:30 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":376051,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T15:01:17+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 11:30 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."},{"raw_change_id":376051,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:42+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Unisys Corporation (ARIN) to Zenlayer Network Technologies (Shanghai) Co. Ltd. (APNIC) on 2019-06-26 11:30 UTC: it left ARIN for APNIC. ARIN-Issued didn't list this change; it is not a new allocation and is not offered to ARIN applicants."}]},"arin_statistics_now":{"status":"not listed"}}