{"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":"158.51.50.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/158.51.50.0-158.51.51.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-01-03)"},"current_holder":{"rir":"ARIN","org":"ARROW DATACENTERS INC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":45351,"date":"2026-08-28T18:49:34Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"VURGE INC.","recipient_org":"ARROW DATACENTERS INC","range":"158.51.50.0/23","log":"ARIN"}],"events":[{"event_id":"d92329708218bae9","registry":"ARIN","report_date":"2026-08-28","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"158.51.50.0/23","start":"158.51.50.0","end":"158.51.51.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"VURGE INC.","recipient_organization":"ARROW DATACENTERS INC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:30+00:00","page":"https://rirtracker.com/ip/158.51.50.0-158.51.51.255/#e-d92329708218bae9","report_page":"https://rirtracker.com/arin/reports/2026-08-28/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.50.0-158.51.51.255.json","observed":"Merger/acquisition: VURGE INC. (ARIN) to ARROW DATACENTERS INC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from VURGE INC. (ARIN) to ARROW DATACENTERS INC (ARIN) on 2026-08-28 18:49 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 2026-08-28 18:49 UTC, VURGE INC. (ARIN) to ARROW DATACENTERS INC (ARIN); resources moved: 158.51.50.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260827","retrieved_at":"2026-10-09T19:06:45+00:00","summary":"ARIN delegated statistics 2026-08-27 (produced 2026-08-27T13:00:21+00:00), before the report: allocated (dated 2020-01-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260829","retrieved_at":"2026-10-09T19:06:51+00:00","summary":"ARIN delegated statistics 2026-08-29 (produced 2026-08-29T13:00:21+00:00), after the report: allocated (dated 2020-01-03)"}]},{"event_id":"982e046a5e3e0a99","registry":"ARIN","report_date":"2021-10-04","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"158.51.50.0/23","start":"158.51.50.0","end":"158.51.51.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:08:29+00:00","page":"https://rirtracker.com/ip/158.51.50.0-158.51.51.255/#e-982e046a5e3e0a99","report_page":"https://rirtracker.com/arin/reports/2021-10-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.50.0-158.51.51.255.json","observed":"158.51.50.0/23 allocated on 2021-10-04, reserved on 2021-10-05","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_days":60,"estimated_hold_end":"2021-12-03","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2020-01-03) on 2021-10-03 and reserved on 2021-10-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2021-12-03. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211005.gz","retrieved_at":"2026-10-12T22:49:56+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 158.51.50.0/23 allocated on 2021-10-04, reserved on 2021-10-05"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211003.gz","retrieved_at":"2026-10-12T22:49:51+00:00","summary":"ARIN delegated statistics 2021-10-03 (produced 2021-10-03T14:00:12+00:00), before the report: allocated (dated 2020-01-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211005.gz","retrieved_at":"2026-10-12T22:49:56+00:00","summary":"ARIN delegated statistics 2021-10-05 (produced 2021-10-05T14:00:13+00:00), after the report: reserved"}]},{"event_id":"88ae6a85e1dea396","registry":"ARIN","report_date":"2020-01-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 158.51.50.0-158.51.51.255","resource_type":"ipv4","resource":"158.51.50.0/23","start":"158.51.50.0","end":"158.51.51.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:41+00:00","page":"https://rirtracker.com/ip/158.51.50.0-158.51.51.255/#e-88ae6a85e1dea396","report_page":"https://rirtracker.com/arin/reports/2020-01-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/158.51.50.0-158.51.51.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2020-January/004040.html","retrieved_at":"2026-10-12T18:40:45+00:00","summary":"ARIN-Issued report for 2020-01-03: \"Add 158.51.50.0-158.51.51.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200102.gz","retrieved_at":"2026-10-12T22:16:55+00:00","summary":"ARIN delegated statistics 2020-01-02 (produced 2020-01-02T15:00:13+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200104.gz","retrieved_at":"2026-10-12T22:17:07+00:00","summary":"ARIN delegated statistics 2020-01-04 (produced 2020-01-04T15:00:09+00:00), after the report: allocated (dated 2020-01-03)"}]}],"classification_history":{"d92329708218bae9":[{"raw_change_id":577106,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:30+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from VURGE INC. (ARIN) to ARROW DATACENTERS INC (ARIN) on 2026-08-28 18:49 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."}],"982e046a5e3e0a99":[{"raw_change_id":416917,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:47:15+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2020-01-03) on 2021-10-03 and reserved on 2021-10-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2021-12-03. This does not confirm availability."},{"raw_change_id":416917,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:19:53+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2020-01-03) on 2021-10-03 and reserved on 2021-10-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2021-12-03. This does not confirm availability."},{"raw_change_id":416917,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:03:45+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2020-01-03) on 2021-10-03 and reserved on 2021-10-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2021-12-03. This does not confirm availability."},{"raw_change_id":416917,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:08:29+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2020-01-03) on 2021-10-03 and reserved on 2021-10-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2021-12-03. This does not confirm availability."}],"88ae6a85e1dea396":[{"raw_change_id":163098,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:46:45+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163098,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:41+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163098,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:25+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":163098,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:41+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2020-01-02 and allocated (dated 2020-01-03) on 2020-01-04. The tracker saw this range released from hold on 2011-08-17 (158.51.0.0-158.51.255.255), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2020-01-03)"}}