{"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":"209.251.236.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/209.251.236.0-209.251.237.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2017-03-03)"},"current_holder":{"rir":"ARIN","org":"oXya Corporation","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":29318,"date":"2022-09-30T18:20:04Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Hitachi Consulting Corporation","recipient_org":"oXya Corporation","range":"209.251.236.0/23","log":"ARIN"},{"id":8782,"date":"2017-03-03T16:47:49Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Nova Internet Services, Inc.","recipient_org":"Hitachi Consulting Corporation","range":"209.251.236.0/23","log":"ARIN"}],"events":[{"event_id":"95ceb172a8f9ca07","registry":"ARIN","report_date":"2022-09-30","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"209.251.236.0/23","start":"209.251.236.0","end":"209.251.237.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Hitachi Consulting Corporation","recipient_organization":"oXya Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:04+00:00","page":"https://rirtracker.com/ip/209.251.236.0-209.251.237.255/#e-95ceb172a8f9ca07","report_page":"https://rirtracker.com/arin/reports/2022-09-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/209.251.236.0-209.251.237.255.json","observed":"Merger/acquisition: Hitachi Consulting Corporation (ARIN) to oXya Corporation (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Hitachi Consulting Corporation (ARIN) to oXya Corporation (ARIN) on 2022-09-30 18:20 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 2022-09-30 18:20 UTC, Hitachi Consulting Corporation (ARIN) to oXya Corporation (ARIN); resources moved: 209.251.236.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220929.gz","retrieved_at":"2026-10-12T23:08:33+00:00","summary":"ARIN delegated statistics 2022-09-29 (produced 2022-09-29T13:00:10+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20221001.gz","retrieved_at":"2026-10-12T23:08:38+00:00","summary":"ARIN delegated statistics 2022-10-01 (produced 2022-10-01T13:00:10+00:00), after the report: allocated (dated 2017-03-03)"}]},{"event_id":"f46c5937cec36799","registry":"ARIN","report_date":"2022-08-08","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"209.251.236.0/23","start":"209.251.236.0","end":"209.251.237.255","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":"2026-10-14T00:09:33+00:00","page":"https://rirtracker.com/ip/209.251.236.0-209.251.237.255/#e-f46c5937cec36799","report_page":"https://rirtracker.com/arin/reports/2022-08-08/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/209.251.236.0-209.251.237.255.json","observed":"209.251.236.0/23 allocated on 2022-08-08, reserved on 2022-08-09","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":"2022-10-07","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 2017-03-03) on 2022-08-07 and reserved on 2022-08-09. 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 2022-10-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220809.gz","retrieved_at":"2026-10-12T23:05:50+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 209.251.236.0/23 allocated on 2022-08-08, reserved on 2022-08-09"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220807.gz","retrieved_at":"2026-10-12T23:05:46+00:00","summary":"ARIN delegated statistics 2022-08-07 (produced 2022-08-07T13:00:11+00:00), before the report: allocated (dated 2017-03-03)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220809.gz","retrieved_at":"2026-10-12T23:05:50+00:00","summary":"ARIN delegated statistics 2022-08-09 (produced 2022-08-09T13:00:11+00:00), after the report: reserved"}]},{"event_id":"88e82349bff95dbc","registry":"ARIN","report_date":"2017-03-03","source":"arin_issued","raw_action":"ADD","raw_line":"Add 209.251.236.0-209.251.237.255","resource_type":"ipv4","resource":"209.251.236.0/23","start":"209.251.236.0","end":"209.251.237.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Nova Internet Services, Inc.","recipient_organization":"Hitachi Consulting Corporation","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:44+00:00","page":"https://rirtracker.com/ip/209.251.236.0-209.251.237.255/#e-88e82349bff95dbc","report_page":"https://rirtracker.com/arin/reports/2017-03-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/209.251.236.0-209.251.237.255.json","explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN) on 2017-03-03 16:47 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2017-March/003004.html","retrieved_at":"2026-10-12T18:39:34+00:00","summary":"ARIN-Issued report for 2017-03-03: \"Add 209.251.236.0-209.251.237.255\""},{"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 2017-03-03 16:47 UTC, Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN); resources moved: 209.251.236.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170302.gz","retrieved_at":"2026-10-12T21:24:24+00:00","summary":"ARIN delegated statistics 2017-03-02 (produced 2017-03-02T06:10:38+00:00), before the report: allocated (dated 1998-08-12)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170304.gz","retrieved_at":"2026-10-12T21:24:35+00:00","summary":"ARIN delegated statistics 2017-03-04 (produced 2017-03-04T06:10:49+00:00), after the report: allocated (dated 2017-03-03)"}]}],"classification_history":{"95ceb172a8f9ca07":[{"raw_change_id":566494,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:04+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Hitachi Consulting Corporation (ARIN) to oXya Corporation (ARIN) on 2022-09-30 18:20 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."}],"f46c5937cec36799":[{"raw_change_id":431313,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:52:44+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 2017-03-03) on 2022-08-07 and reserved on 2022-08-09. 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 2022-10-07. This does not confirm availability."},{"raw_change_id":431313,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:20:47+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 2017-03-03) on 2022-08-07 and reserved on 2022-08-09. 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 2022-10-07. This does not confirm availability."},{"raw_change_id":431313,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:04:42+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 2017-03-03) on 2022-08-07 and reserved on 2022-08-09. 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 2022-10-07. This does not confirm availability."},{"raw_change_id":431313,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:33+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 2017-03-03) on 2022-08-07 and reserved on 2022-08-09. 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 2022-10-07. This does not confirm availability."}],"88e82349bff95dbc":[{"raw_change_id":148259,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:37:27+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN) on 2017-03-03 16:47 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148259,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:59+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN) on 2017-03-03 16:47 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148259,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:38+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN) on 2017-03-03 16:47 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":148259,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:44+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Hitachi Consulting Corporation (ARIN) on 2017-03-03 16:47 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2017-03-03)"}}