{"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":"72.19.3.0/24","resource_type":"ipv4","page":"https://rirtracker.com/ip/72.19.3.0-72.19.3.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2019-08-30)"},"current_holder":{"rir":"ARIN","org":"F5, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":32249,"date":"2023-06-20T18:58:55Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Volterra Inc","recipient_org":"F5, Inc.","range":"72.19.3.0/24","log":"ARIN"}],"events":[{"event_id":"ad43ecb7a6297ace","registry":"ARIN","report_date":"2023-06-20","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"72.19.3.0/24","start":"72.19.3.0","end":"72.19.3.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Volterra Inc","recipient_organization":"F5, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:09+00:00","page":"https://rirtracker.com/ip/72.19.3.0-72.19.3.255/#e-ad43ecb7a6297ace","report_page":"https://rirtracker.com/arin/reports/2023-06-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.19.3.0-72.19.3.255.json","observed":"Merger/acquisition: Volterra Inc (ARIN) to F5, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Volterra Inc (ARIN) to F5, Inc. (ARIN) on 2023-06-20 18:58 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 2023-06-20 18:58 UTC, Volterra Inc (ARIN) to F5, Inc. (ARIN); resources moved: 72.19.3.0/24"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230619.gz","retrieved_at":"2026-10-12T23:22:37+00:00","summary":"ARIN delegated statistics 2023-06-19 (produced 2023-06-19T13:00:11+00:00), before the report: allocated (dated 2019-08-30)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230621.gz","retrieved_at":"2026-10-12T23:22:42+00:00","summary":"ARIN delegated statistics 2023-06-21 (produced 2023-06-21T13:00:12+00:00), after the report: allocated (dated 2019-08-30)"}]},{"event_id":"776589aa1c3a3f01","registry":"ARIN","report_date":"2019-08-30","source":"arin_issued","raw_action":"ADD","raw_line":"Add 72.19.3.0-72.19.3.255","resource_type":"ipv4","resource":"72.19.3.0/24","start":"72.19.3.0","end":"72.19.3.255","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":"2026-10-13T23:52:35+00:00","page":"https://rirtracker.com/ip/72.19.3.0-72.19.3.255/#e-776589aa1c3a3f01","report_page":"https://rirtracker.com/arin/reports/2019-08-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.19.3.0-72.19.3.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (72.19.0.0/19), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2019-August/003914.html","retrieved_at":"2026-10-12T18:40:35+00:00","summary":"ARIN-Issued report for 2019-08-30: \"Add 72.19.3.0-72.19.3.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190829.gz","retrieved_at":"2026-10-12T22:10:17+00:00","summary":"ARIN delegated statistics 2019-08-29 (produced 2019-08-29T14:00:16+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190831.gz","retrieved_at":"2026-10-12T22:10:30+00:00","summary":"ARIN delegated statistics 2019-08-31 (produced 2019-08-31T14:00:17+00:00), after the report: allocated (dated 2019-08-30)"}]},{"event_id":"7f041c9d8cd9b944","registry":"ARIN","report_date":"2019-08-30","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 72.19.3.0-72.19.3.255","resource_type":"ipv4","resource":"72.19.3.0/24","start":"72.19.3.0","end":"72.19.3.255","classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:35+00:00","page":"https://rirtracker.com/ip/72.19.3.0-72.19.3.255/#e-7f041c9d8cd9b944","report_page":"https://rirtracker.com/arin/reports/2019-08-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/72.19.3.0-72.19.3.255.json","explanation":"ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. ARIN removed its own pool record for this range as part of issuing it: the same report adds 72.19.3.0-72.19.3.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2019-August/003914.html","retrieved_at":"2026-10-12T18:40:35+00:00","summary":"ARIN-Issued report for 2019-08-30: \"Remove 72.19.3.0-72.19.3.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190829.gz","retrieved_at":"2026-10-12T22:10:17+00:00","summary":"ARIN delegated statistics 2019-08-29 (produced 2019-08-29T14:00:16+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2019/delegated-arin-extended-20190831.gz","retrieved_at":"2026-10-12T22:10:30+00:00","summary":"ARIN delegated statistics 2019-08-31 (produced 2019-08-31T14:00:17+00:00), after the report: allocated (dated 2019-08-30)"}]}],"classification_history":{"ad43ecb7a6297ace":[{"raw_change_id":568684,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:09+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Volterra Inc (ARIN) to F5, Inc. (ARIN) on 2023-06-20 18:58 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."}],"776589aa1c3a3f01":[{"raw_change_id":161312,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:45:31+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (72.19.0.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161312,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:37+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (72.19.0.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161312,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:20+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (72.19.0.0/19), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":161312,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:35+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. The tracker saw this range removed from registration on 2013-07-08 (72.19.0.0/19), so it appears to have been issued again from ARIN's pool."}],"7f041c9d8cd9b944":[{"raw_change_id":161269,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:45:29+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. ARIN removed its own pool record for this range as part of issuing it: the same report adds 72.19.3.0-72.19.3.255. The issuance is explained on that line."},{"raw_change_id":161269,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:37+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. ARIN removed its own pool record for this range as part of issuing it: the same report adds 72.19.3.0-72.19.3.255. The issuance is explained on that line."},{"raw_change_id":161269,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:20+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. ARIN removed its own pool record for this range as part of issuing it: the same report adds 72.19.3.0-72.19.3.255. The issuance is explained on that line."},{"raw_change_id":161269,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:35+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2019-08-29 and allocated (dated 2019-08-30) on 2019-08-31. ARIN removed its own pool record for this range as part of issuing it: the same report adds 72.19.3.0-72.19.3.255. The issuance is explained on that line."}]},"arin_statistics_now":{"status":"allocated (dated 2019-08-30)"}}