{"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":"209.251.242.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/209.251.242.0-209.251.243.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2016-08-17)"},"current_holder":{"rir":"ARIN","org":"Thomas Jefferson University Hospitals, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":34728,"date":"2024-03-04T18:39:53Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Kennedy Memorial Hospitals - University Medical Center","recipient_org":"Thomas Jefferson University Hospitals, Inc.","range":"209.251.242.0/23","log":"ARIN"},{"id":7574,"date":"2016-08-17T14:07:40Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Nova Internet Services, Inc.","recipient_org":"Kennedy Memorial Hospitals - University Medical Center","range":"209.251.242.0/23","log":"ARIN"}],"events":[{"event_id":"6be706e963f6740b","registry":"ARIN","report_date":"2024-03-04","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"209.251.242.0/23","start":"209.251.242.0","end":"209.251.243.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Kennedy Memorial Hospitals - University Medical Center","recipient_organization":"Thomas Jefferson University Hospitals, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:13+00:00","page":"https://rirtracker.com/ip/209.251.242.0-209.251.243.255/#e-6be706e963f6740b","report_page":"https://rirtracker.com/arin/reports/2024-03-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/209.251.242.0-209.251.243.255.json","observed":"Merger/acquisition: Kennedy Memorial Hospitals - University Medical Center (ARIN) to Thomas Jefferson University Hospitals, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Kennedy Memorial Hospitals - University Medical Center (ARIN) to Thomas Jefferson University Hospitals, Inc. (ARIN) on 2024-03-04 18:39 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 2024-03-04 18:39 UTC, Kennedy Memorial Hospitals - University Medical Center (ARIN) to Thomas Jefferson University Hospitals, Inc. (ARIN); resources moved: 209.251.242.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240303.gz","retrieved_at":"2026-10-12T23:36:08+00:00","summary":"ARIN delegated statistics 2024-03-03 (produced 2024-03-03T14:00:45+00:00), before the report: allocated (dated 2016-08-17)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240305.gz","retrieved_at":"2026-10-12T23:36:13+00:00","summary":"ARIN delegated statistics 2024-03-05 (produced 2024-03-05T14:00:45+00:00), after the report: allocated (dated 2016-08-17)"}]},{"event_id":"b3589dba74beadbf","registry":"ARIN","report_date":"2016-08-17","source":"arin_issued","raw_action":"ADD","raw_line":"Add 209.251.242.0-209.251.243.255","resource_type":"ipv4","resource":"209.251.242.0/23","start":"209.251.242.0","end":"209.251.243.255","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":"Kennedy Memorial Hospitals - University Medical Center","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:37+00:00","page":"https://rirtracker.com/ip/209.251.242.0-209.251.243.255/#e-b3589dba74beadbf","report_page":"https://rirtracker.com/arin/reports/2016-08-17/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/209.251.242.0-209.251.243.255.json","explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN) on 2016-08-17 14:07 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/2016-August/002806.html","retrieved_at":"2026-10-12T18:39:19+00:00","summary":"ARIN-Issued report for 2016-08-17: \"Add 209.251.242.0-209.251.243.255\""},{"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 2016-08-17 14:07 UTC, Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN); resources moved: 209.251.242.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160816.gz","retrieved_at":"2026-10-12T21:14:50+00:00","summary":"ARIN delegated statistics 2016-08-16 (produced 2016-08-16T05:09:22+00:00), before the report: allocated (dated 1998-08-12)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160818.gz","retrieved_at":"2026-10-12T21:14:55+00:00","summary":"ARIN delegated statistics 2016-08-18 (produced 2016-08-18T05:09:30+00:00), after the report: assigned (dated 2016-08-17)"}]}],"classification_history":{"6be706e963f6740b":[{"raw_change_id":570410,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:13+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Kennedy Memorial Hospitals - University Medical Center (ARIN) to Thomas Jefferson University Hospitals, Inc. (ARIN) on 2024-03-04 18:39 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."}],"b3589dba74beadbf":[{"raw_change_id":145907,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:35:50+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN) on 2016-08-17 14:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145907,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:53+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN) on 2016-08-17 14:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145907,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:31+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN) on 2016-08-17 14:07 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145907,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:37+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Nova Internet Services, Inc. (ARIN) to Kennedy Memorial Hospitals - University Medical Center (ARIN) on 2016-08-17 14:07 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 2016-08-17)"}}