{"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":"151.192.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/151.192.0.0-151.192.255.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 1991-09-23)"},"current_holder":{"rir":"APNIC","org":"SingNet Private Limited (SINGNET-SG)","how":"APNIC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18748,"date":"2019-09-03T14:30:11Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"Microchip Technology Inc.","recipient_org":"SingNet Private Limited (SINGNET-SG)","range":"151.192.0.0/16","log":"ARIN"},{"id":126250,"date":"2019-09-03T03:55:13Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"MICROC-Z","recipient_org":"SingNet Pte Ltd","range":"151.192.0.0/16","log":"APNIC"},{"id":17227,"date":"2019-03-27T10:24:23Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sierra Semiconductor","recipient_org":"Microchip Technology Inc.","range":"151.192.0.0/16","log":"ARIN"}],"events":[{"event_id":"a646a73af5ebb702","registry":"ARIN","report_date":"2019-09-03","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"151.192.0.0/16","start":"151.192.0.0","end":"151.192.255.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"Microchip Technology Inc.","recipient_organization":"SingNet Private Limited (SINGNET-SG)","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":"2026-10-14T00:05:54+00:00","page":"https://rirtracker.com/ip/151.192.0.0-151.192.255.255/#e-a646a73af5ebb702","report_page":"https://rirtracker.com/arin/reports/2019-09-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/151.192.0.0-151.192.255.255.json","observed":"151.192.0.0/16 assigned on 2019-09-03, not listed on 2019-09-04","same_transfer_as":"5327e955b912e740","explanation":"ARIN's transfer log records a transfer from Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC) on 2019-09-03 14:30 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-20190904.gz","retrieved_at":"2026-10-12T22:10:40+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 151.192.0.0/16 assigned on 2019-09-03, not listed on 2019-09-04"},{"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 2019-09-03 14:30 UTC, Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC); resources moved: 151.192.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190902.gz","retrieved_at":"2026-10-12T22:10:35+00:00","summary":"ARIN delegated statistics 2019-09-02 (produced 2019-09-02T14:00:16+00:00), before the report: assigned (dated 1991-09-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190904.gz","retrieved_at":"2026-10-12T22:10:40+00:00","summary":"ARIN delegated statistics 2019-09-04 (produced 2019-09-04T14:00:17+00:00), after the report: not listed"}]},{"event_id":"5327e955b912e740","registry":"APNIC","report_date":"2019-09-03","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"151.192.0.0/16","start":"151.192.0.0","end":"151.192.255.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into APNIC","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"MICROC-Z","recipient_organization":"SingNet Pte 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/151.192.0.0-151.192.255.255/#e-5327e955b912e740","report_page":"https://rirtracker.com/apnic/reports/2019-09-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/151.192.0.0-151.192.255.255.json","observed":"Transfer: MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC)","same_transfer_as":"a646a73af5ebb702","explanation":"APNIC's transfer log records a transfer from MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC) on 2019-09-03 03:55 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 2019-09-03 03:55 UTC, MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC); resources moved: 151.192.0.0/16"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190903.gz","retrieved_at":"2026-10-12T23:00:21+00:00","summary":"APNIC delegated statistics 2019-09-03, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190904.gz","retrieved_at":"2026-10-12T23:00:33+00:00","summary":"APNIC delegated statistics 2019-09-04, after the change: allocated (dated 1991-09-23)"}]},{"event_id":"5f2aabbcdad95995","registry":"ARIN","report_date":"2019-03-27","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"151.192.0.0/16","start":"151.192.0.0","end":"151.192.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sierra Semiconductor","recipient_organization":"Microchip Technology Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:43+00:00","page":"https://rirtracker.com/ip/151.192.0.0-151.192.255.255/#e-5f2aabbcdad95995","report_page":"https://rirtracker.com/arin/reports/2019-03-27/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/151.192.0.0-151.192.255.255.json","observed":"Merger/acquisition: Sierra Semiconductor (ARIN) to Microchip Technology Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sierra Semiconductor (ARIN) to Microchip Technology Inc. (ARIN) on 2019-03-27 10:24 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.","evidence":[{"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: MERGER_ACQUISITION on 2019-03-27 10:24 UTC, Sierra Semiconductor (ARIN) to Microchip Technology Inc. (ARIN); resources moved: 151.192.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190326.gz","retrieved_at":"2026-10-12T22:02:24+00:00","summary":"ARIN delegated statistics 2019-03-26 (produced 2019-03-26T05:00:17+00:00), before the report: assigned (dated 1991-09-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190328.gz","retrieved_at":"2026-10-12T22:02:29+00:00","summary":"ARIN delegated statistics 2019-03-28 (produced 2019-03-28T05:00:13+00:00), after the report: assigned (dated 1991-09-23)"}]}],"classification_history":{"a646a73af5ebb702":[{"raw_change_id":379251,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T05:31:34+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC) on 2019-09-03 14:30 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":379251,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:46+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC) on 2019-09-03 14:30 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":379251,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T15:01:28+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC) on 2019-09-03 14:30 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":379251,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:54+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Microchip Technology Inc. (ARIN) to SingNet Private Limited (SINGNET-SG) (APNIC) on 2019-09-03 14:30 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."}],"5327e955b912e740":[{"raw_change_id":36019,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:04+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC) on 2019-09-03 03:55 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36019,"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 MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC) on 2019-09-03 03:55 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36019,"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 MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC) on 2019-09-03 03:55 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":36019,"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 MICROC-Z (ARIN) to SingNet Pte Ltd (APNIC) on 2019-09-03 03:55 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."}],"5f2aabbcdad95995":[{"raw_change_id":558109,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:43+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sierra Semiconductor (ARIN) to Microchip Technology Inc. (ARIN) on 2019-03-27 10:24 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it."}]},"arin_statistics_now":{"status":"not listed"}}