{"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":"206.51.240.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/206.51.240.0-206.51.247.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2015-04-07)"},"current_holder":{"rir":"ARIN","org":"DEFT.COM","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":37194,"date":"2024-11-15T18:01:49Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Server Central Network","recipient_org":"DEFT.COM","range":"206.51.240.0/21","log":"ARIN"}],"events":[{"event_id":"a70a5a3c6dac4449","registry":"ARIN","report_date":"2024-11-15","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"206.51.240.0/21","start":"206.51.240.0","end":"206.51.247.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Server Central Network","recipient_organization":"DEFT.COM","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","page":"https://rirtracker.com/ip/206.51.240.0-206.51.247.255/#e-a70a5a3c6dac4449","report_page":"https://rirtracker.com/arin/reports/2024-11-15/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/206.51.240.0-206.51.247.255.json","observed":"Merger/acquisition: Server Central Network (ARIN) to DEFT.COM (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Server Central Network (ARIN) to DEFT.COM (ARIN) on 2024-11-15 18:01 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 2024-11-15 18:01 UTC, Server Central Network (ARIN) to DEFT.COM (ARIN); resources moved: 206.51.240.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241114.gz","retrieved_at":"2026-10-12T23:49:51+00:00","summary":"ARIN delegated statistics 2024-11-14 (produced 2024-11-14T14:00:54+00:00), before the report: allocated (dated 2015-04-07)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241116.gz","retrieved_at":"2026-10-12T23:50:07+00:00","summary":"ARIN delegated statistics 2024-11-16 (produced 2024-11-16T14:00:54+00:00), after the report: allocated (dated 2015-04-07)"}]},{"event_id":"ee68d64267633c8a","registry":"ARIN","report_date":"2010-08-20","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 206.51.240.0-206.51.247.255","resource_type":"ipv4","resource":"206.51.240.0/21","start":"206.51.240.0","end":"206.51.247.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","page":"https://rirtracker.com/ip/206.51.240.0-206.51.247.255/#e-ee68d64267633c8a","report_page":"https://rirtracker.com/arin/reports/2010-08-20/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/206.51.240.0-206.51.247.255.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-08-19 and not issued on 2010-08-21. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-August/000613.html","retrieved_at":"2026-10-12T18:36:47+00:00","summary":"ARIN-Issued report for 2010-08-20: \"Remove 206.51.240.0-206.51.247.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100819.gz","retrieved_at":"2026-10-12T19:09:13+00:00","summary":"ARIN delegated statistics 2010-08-19, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100821.gz","retrieved_at":"2026-10-12T19:09:18+00:00","summary":"ARIN delegated statistics 2010-08-21, after the report: not issued"}]},{"event_id":"93d107cf328f7cfc","registry":"ARIN","report_date":"2009-08-18","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"206.51.240.0/21","start":"206.51.240.0","end":"206.51.247.255","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":"2026-10-13T23:55:17+00:00","page":"https://rirtracker.com/ip/206.51.240.0-206.51.247.255/#e-93d107cf328f7cfc","report_page":"https://rirtracker.com/arin/reports/2009-08-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/206.51.240.0-206.51.247.255.json","observed":"206.51.240.0/21 allocated on 2009-08-18, not listed on 2009-08-19","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":"2009-10-17","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 2008-11-12) on 2009-08-17 and not issued on 2009-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-10-17. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090819.gz","retrieved_at":"2026-10-12T18:54:08+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 206.51.240.0/21 allocated on 2009-08-18, not listed on 2009-08-19"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090817.gz","retrieved_at":"2026-10-12T18:54:03+00:00","summary":"ARIN delegated statistics 2009-08-17, before the report: allocated (dated 2008-11-12)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2009/delegated-arin-20090819.gz","retrieved_at":"2026-10-12T18:54:08+00:00","summary":"ARIN delegated statistics 2009-08-19, after the report: not issued"}]}],"classification_history":{"a70a5a3c6dac4449":[{"raw_change_id":572022,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Server Central Network (ARIN) to DEFT.COM (ARIN) on 2024-11-15 18:01 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."}],"ee68d64267633c8a":[{"raw_change_id":121708,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:30+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-08-19 and not issued on 2010-08-21. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121708,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:17+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-08-19 and not issued on 2010-08-21. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121708,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:50+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-08-19 and not issued on 2010-08-21. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."},{"raw_change_id":121708,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2010-08-19 and not issued on 2010-08-21. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed."}],"93d107cf328f7cfc":[{"raw_change_id":208892,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:12:09+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 2008-11-12) on 2009-08-17 and not issued on 2009-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-10-17. This does not confirm availability."},{"raw_change_id":208892,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:42+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 2008-11-12) on 2009-08-17 and not issued on 2009-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-10-17. This does not confirm availability."},{"raw_change_id":208892,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:40+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 2008-11-12) on 2009-08-17 and not issued on 2009-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-10-17. This does not confirm availability."},{"raw_change_id":208892,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:55:17+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 2008-11-12) on 2009-08-17 and not issued on 2009-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2009-10-17. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2015-04-07)"}}