{"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":"199.58.28.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/199.58.28.0-199.58.31.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-06-04)"},"current_holder":{"rir":"ARIN","org":"County of Monterey","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":18118,"date":"2019-06-04T17:16:16Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sanford Burnham Prebys Medical Discovery Institute","recipient_org":"County of Monterey","range":"199.58.28.0/22","log":"ARIN"}],"events":[{"event_id":"ac406a9b14941a1f","registry":"ARIN","report_date":"2019-06-04","source":"arin_issued","raw_action":"ADD","raw_line":"Add 199.58.28.0-199.58.31.255","resource_type":"ipv4","resource":"199.58.28.0/22","start":"199.58.28.0","end":"199.58.31.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sanford Burnham Prebys Medical Discovery Institute","recipient_organization":"County of Monterey","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:31+00:00","page":"https://rirtracker.com/ip/199.58.28.0-199.58.31.255/#e-ac406a9b14941a1f","report_page":"https://rirtracker.com/arin/reports/2019-06-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.58.28.0-199.58.31.255.json","explanation":"ARIN's transfer log records a transfer from Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN) on 2019-06-04 17:16 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/2019-June/003828.html","retrieved_at":"2026-10-12T18:40:31+00:00","summary":"ARIN-Issued report for 2019-06-04: \"Add 199.58.28.0-199.58.31.255\""},{"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 2019-06-04 17:16 UTC, Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN); resources moved: 199.58.28.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190603.gz","retrieved_at":"2026-10-12T22:06:00+00:00","summary":"ARIN delegated statistics 2019-06-03 (produced 2019-06-03T05:00:16+00:00), before the report: assigned (dated 2009-02-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190606.gz","retrieved_at":"2026-10-12T22:06:08+00:00","summary":"ARIN delegated statistics 2019-06-06 (produced 2019-06-06T14:00:16+00:00), after the report: assigned (dated 2019-06-04)"}]},{"event_id":"627afa6fdd09438e","registry":"ARIN","report_date":"2009-02-23","source":"arin_issued","raw_action":"ADD","raw_line":"Add 199.58.28.0-199.58.31.255","resource_type":"ipv4","resource":"199.58.28.0/22","start":"199.58.28.0","end":"199.58.31.255","classification":"APPARENT_NEW_ISSUANCE","classification_label":"Apparent new issuance","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":"2026-10-13T23:50:44+00:00","page":"https://rirtracker.com/ip/199.58.28.0-199.58.31.255/#e-627afa6fdd09438e","report_page":"https://rirtracker.com/arin/reports/2009-02-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/199.58.28.0-199.58.31.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-02-22 and assigned (dated 2009-02-23) on 2009-02-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2009-February/000066.html","retrieved_at":"2026-10-12T18:36:09+00:00","summary":"ARIN-Issued report for 2009-02-23: \"Add 199.58.28.0-199.58.31.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090222.gz","retrieved_at":"2026-10-12T18:46:50+00:00","summary":"ARIN delegated statistics 2009-02-22, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090224.gz","retrieved_at":"2026-10-12T18:46:54+00:00","summary":"ARIN delegated statistics 2009-02-24, after the report: assigned (dated 2009-02-23)"}]}],"classification_history":{"ac406a9b14941a1f":[{"raw_change_id":159931,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:44:27+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN) on 2019-06-04 17:16 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159931,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:33+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN) on 2019-06-04 17:16 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159931,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:16+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN) on 2019-06-04 17:16 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":159931,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:31+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Sanford Burnham Prebys Medical Discovery Institute (ARIN) to County of Monterey (ARIN) on 2019-06-04 17:16 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"627afa6fdd09438e":[{"raw_change_id":119015,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:11:04+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-02-22 and assigned (dated 2009-02-23) on 2009-02-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":119015,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:13+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-02-22 and assigned (dated 2009-02-23) on 2009-02-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":119015,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:46+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-02-22 and assigned (dated 2009-02-23) on 2009-02-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."},{"raw_change_id":119015,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:44+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2009-02-22 and assigned (dated 2009-02-23) on 2009-02-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2019-06-04)"}}