{"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":"148.59.155.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/148.59.155.0-148.59.155.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2018-02-05)"},"current_holder":{"rir":"ARIN","org":"WebMD, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":34240,"date":"2024-01-29T15:23:31Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Healthgrades","recipient_org":"WebMD, Inc.","range":"148.59.155.0/24","log":"ARIN"},{"id":12042,"date":"2018-02-05T17:24:56Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Msen, Inc.","recipient_org":"Healthgrades","range":"148.59.155.0/24","log":"ARIN"}],"events":[{"event_id":"b1b62149797962b1","registry":"ARIN","report_date":"2024-01-29","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"148.59.155.0/24","start":"148.59.155.0","end":"148.59.155.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Healthgrades","recipient_organization":"WebMD, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","page":"https://rirtracker.com/ip/148.59.155.0-148.59.155.255/#e-b1b62149797962b1","report_page":"https://rirtracker.com/arin/reports/2024-01-29/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/148.59.155.0-148.59.155.255.json","observed":"Merger/acquisition: Healthgrades (ARIN) to WebMD, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Healthgrades (ARIN) to WebMD, Inc. (ARIN) on 2024-01-29 15:23 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 2024-01-29 15:23 UTC, Healthgrades (ARIN) to WebMD, Inc. (ARIN); resources moved: 148.59.155.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240128.gz","retrieved_at":"2026-10-12T23:34:20+00:00","summary":"ARIN delegated statistics 2024-01-28 (produced 2024-01-28T14:00:44+00:00), before the report: allocated (dated 2018-02-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240130.gz","retrieved_at":"2026-10-12T23:34:25+00:00","summary":"ARIN delegated statistics 2024-01-30 (produced 2024-01-30T14:00:44+00:00), after the report: allocated (dated 2018-02-05)"}]},{"event_id":"d4df30b03503acd4","registry":"ARIN","report_date":"2018-02-05","source":"arin_issued","raw_action":"ADD","raw_line":"Add 148.59.155.0-148.59.155.255","resource_type":"ipv4","resource":"148.59.155.0/24","start":"148.59.155.0","end":"148.59.155.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Msen, Inc.","recipient_organization":"Healthgrades","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:04+00:00","page":"https://rirtracker.com/ip/148.59.155.0-148.59.155.255/#e-d4df30b03503acd4","report_page":"https://rirtracker.com/arin/reports/2018-02-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/148.59.155.0-148.59.155.255.json","explanation":"ARIN's transfer log records a transfer from Msen, Inc. (ARIN) to Healthgrades (ARIN) on 2018-02-05 17:24 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/2018-February/003344.html","retrieved_at":"2026-10-12T18:39:57+00:00","summary":"ARIN-Issued report for 2018-02-05: \"Add 148.59.155.0-148.59.155.255\""},{"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 2018-02-05 17:24 UTC, Msen, Inc. (ARIN) to Healthgrades (ARIN); resources moved: 148.59.155.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180204.gz","retrieved_at":"2026-10-12T21:41:23+00:00","summary":"ARIN delegated statistics 2018-02-04 (produced 2018-02-04T06:10:04+00:00), before the report: assigned (dated 1991-04-09)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180206.gz","retrieved_at":"2026-10-12T21:41:27+00:00","summary":"ARIN delegated statistics 2018-02-06 (produced 2018-02-06T06:09:51+00:00), after the report: assigned (dated 2018-02-05)"}]}],"classification_history":{"b1b62149797962b1":[{"raw_change_id":569979,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Healthgrades (ARIN) to WebMD, Inc. (ARIN) on 2024-01-29 15:23 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."}],"d4df30b03503acd4":[{"raw_change_id":153271,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:29+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Msen, Inc. (ARIN) to Healthgrades (ARIN) on 2018-02-05 17:24 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153271,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:13+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Msen, Inc. (ARIN) to Healthgrades (ARIN) on 2018-02-05 17:24 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153271,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:54+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Msen, Inc. (ARIN) to Healthgrades (ARIN) on 2018-02-05 17:24 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":153271,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:04+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Msen, Inc. (ARIN) to Healthgrades (ARIN) on 2018-02-05 17:24 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 2018-02-05)"}}