{"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":"161.81.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/161.81.0.0-161.81.255.255/","statistics_now":{"registry":"APNIC","status":"allocated (dated 1992-06-22)"},"current_holder":{"rir":"APNIC","org":"China Mobile Hong Kong Company Limited","how":"APNIC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18543,"date":"2019-08-01T11:35:01Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"Overland Storage, Inc.","recipient_org":"China Mobile Hong Kong Company Limited","range":"161.81.0.0/16","log":"ARIN"},{"id":126207,"date":"2019-08-01T05:56:16Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"APNIC","source_org":"OS-519-Z","recipient_org":"China Mobile Hong Kong Company Limited","range":"161.81.0.0/16","log":"APNIC"},{"id":17862,"date":"2019-05-13T10:59:46Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Exabyte Corporation","recipient_org":"Overland Storage Inc.","range":"161.81.0.0/16","log":"ARIN"}],"events":[{"event_id":"89976cfcdadeee4d","registry":"APNIC","report_date":"2019-08-01","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"161.81.0.0/16","start":"161.81.0.0","end":"161.81.255.255","classification":"INTER_RIR_TRANSFER_IN","classification_label":"Inter-RIR transfer into APNIC","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"OS-519-Z","recipient_organization":"China Mobile Hong Kong Company Limited","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/161.81.0.0-161.81.255.255/#e-89976cfcdadeee4d","report_page":"https://rirtracker.com/apnic/reports/2019-08-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/161.81.0.0-161.81.255.255.json","observed":"Transfer: OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC)","same_transfer_as":"aa5dff89aa84f22e","explanation":"APNIC's transfer log records a transfer from OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 05:56 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 2019-08-01 05:56 UTC, OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC); resources moved: 161.81.0.0/16"},{"type":"delegated_before","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190801.gz","retrieved_at":"2026-10-12T22:57:59+00:00","summary":"APNIC delegated statistics 2019-08-01, before the change: not listed"},{"type":"delegated_after","url":"https://ftp.apnic.net/stats/apnic/2019/delegated-apnic-extended-20190802.gz","retrieved_at":"2026-10-12T22:58:03+00:00","summary":"APNIC delegated statistics 2019-08-02, after the change: allocated (dated 1992-06-22)"}]},{"event_id":"aa5dff89aa84f22e","registry":"ARIN","report_date":"2019-07-31","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"161.81.0.0/16","start":"161.81.0.0","end":"161.81.255.255","classification":"INTER_RIR_TRANSFER_OUT","classification_label":"Inter-RIR transfer out of ARIN","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"APNIC","source_organization":"Overland Storage, Inc.","recipient_organization":"China Mobile Hong Kong Company Limited","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":"2026-10-14T00:05:47+00:00","page":"https://rirtracker.com/ip/161.81.0.0-161.81.255.255/#e-aa5dff89aa84f22e","report_page":"https://rirtracker.com/arin/reports/2019-07-31/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/161.81.0.0-161.81.255.255.json","observed":"161.81.0.0/16 assigned on 2019-07-31, not listed on 2019-08-01","same_transfer_as":"89976cfcdadeee4d","explanation":"ARIN's transfer log records a transfer from Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 11:35 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-20190801.gz","retrieved_at":"2026-10-12T22:08:51+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 161.81.0.0/16 assigned on 2019-07-31, not listed on 2019-08-01"},{"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 2019-08-01 11:35 UTC, Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC); resources moved: 161.81.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190730.gz","retrieved_at":"2026-10-12T22:08:47+00:00","summary":"ARIN delegated statistics 2019-07-30 (produced 2019-07-30T14:00:13+00:00), before the report: assigned (dated 1992-06-22)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190801.gz","retrieved_at":"2026-10-12T22:08:51+00:00","summary":"ARIN delegated statistics 2019-08-01 (produced 2019-08-01T14:00:13+00:00), after the report: not listed"}]},{"event_id":"a25d547340e47ae2","registry":"ARIN","report_date":"2019-05-13","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"161.81.0.0/16","start":"161.81.0.0","end":"161.81.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Exabyte Corporation","recipient_organization":"Overland Storage Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:45+00:00","page":"https://rirtracker.com/ip/161.81.0.0-161.81.255.255/#e-a25d547340e47ae2","report_page":"https://rirtracker.com/arin/reports/2019-05-13/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/161.81.0.0-161.81.255.255.json","observed":"Merger/acquisition: Exabyte Corporation (ARIN) to Overland Storage Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Exabyte Corporation (ARIN) to Overland Storage Inc. (ARIN) on 2019-05-13 10:59 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 2019-05-13 10:59 UTC, Exabyte Corporation (ARIN) to Overland Storage Inc. (ARIN); resources moved: 161.81.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190512.gz","retrieved_at":"2026-10-12T22:04:56+00:00","summary":"ARIN delegated statistics 2019-05-12 (produced 2019-05-12T05:00:13+00:00), before the report: assigned (dated 1992-06-22)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190514.gz","retrieved_at":"2026-10-12T22:05:01+00:00","summary":"ARIN delegated statistics 2019-05-14 (produced 2019-05-14T05:00:14+00:00), after the report: assigned (dated 1992-06-22)"}]}],"classification_history":{"89976cfcdadeee4d":[{"raw_change_id":35960,"classification_code":"INTER_RIR_TRANSFER_IN","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:36:02+00:00","current":0,"public_explanation":"APNIC's transfer log records a transfer from OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 05:56 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35960,"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 OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 05:56 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35960,"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 OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 05:56 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."},{"raw_change_id":35960,"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 OS-519-Z (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 05:56 UTC: it came to APNIC from ARIN. It was already issued by another registry, so this is not a new issuance."}],"aa5dff89aa84f22e":[{"raw_change_id":377343,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T05:30:59+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 11:35 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":377343,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:39+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 11:35 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":377343,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T15:01:21+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 11:35 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":377343,"classification_code":"INTER_RIR_TRANSFER_OUT","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:47+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Overland Storage, Inc. (ARIN) to China Mobile Hong Kong Company Limited (APNIC) on 2019-08-01 11:35 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."}],"a25d547340e47ae2":[{"raw_change_id":558653,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:45+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Exabyte Corporation (ARIN) to Overland Storage Inc. (ARIN) on 2019-05-13 10:59 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"}}