{"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":"172.83.128.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2020-09-28)"},"current_holder":{"rir":"ARIN","org":"Citizens Telephone Cooperative","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":21542,"date":"2020-09-28T19:12:13Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Delaware Internet Services LLC","recipient_org":"Citizens Telephone Cooperative","range":"172.83.128.0/21","log":"ARIN"},{"id":21461,"date":"2020-09-14T15:23:06Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Inspiring Networks LLC","recipient_org":"Delaware Internet Services LLC","range":"172.83.128.0/21","log":"ARIN"}],"events":[{"event_id":"c6868cb126ebce31","registry":"ARIN","report_date":"2020-09-28","source":"arin_issued","raw_action":"ADD","raw_line":"Add 172.83.128.0-172.83.135.255","resource_type":"ipv4","resource":"172.83.128.0/21","start":"172.83.128.0","end":"172.83.135.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Delaware Internet Services LLC","recipient_organization":"Citizens Telephone Cooperative","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:57+00:00","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/#e-c6868cb126ebce31","report_page":"https://rirtracker.com/arin/reports/2020-09-28/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.128.0-172.83.135.255.json","explanation":"ARIN's transfer log records a transfer from Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN) on 2020-09-28 19:12 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/2020-September/004308.html","retrieved_at":"2026-10-12T18:41:02+00:00","summary":"ARIN-Issued report for 2020-09-28: \"Add 172.83.128.0-172.83.135.255\""},{"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 2020-09-28 19:12 UTC, Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN); resources moved: 172.83.128.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200927.gz","retrieved_at":"2026-10-12T22:30:58+00:00","summary":"ARIN delegated statistics 2020-09-27 (produced 2020-09-27T14:00:13+00:00), before the report: allocated (dated 2018-01-18)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200929.gz","retrieved_at":"2026-10-12T22:31:03+00:00","summary":"ARIN delegated statistics 2020-09-29 (produced 2020-09-29T14:00:14+00:00), after the report: allocated (dated 2020-09-28)"}]},{"event_id":"7334c42e0e9d6c41","registry":"ARIN","report_date":"2020-09-14","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"172.83.128.0/21","start":"172.83.128.0","end":"172.83.135.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Inspiring Networks LLC","recipient_organization":"Delaware Internet Services LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:51+00:00","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/#e-7334c42e0e9d6c41","report_page":"https://rirtracker.com/arin/reports/2020-09-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.128.0-172.83.135.255.json","observed":"Merger/acquisition: Inspiring Networks LLC (ARIN) to Delaware Internet Services LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Inspiring Networks LLC (ARIN) to Delaware Internet Services LLC (ARIN) on 2020-09-14 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 2020-09-14 15:23 UTC, Inspiring Networks LLC (ARIN) to Delaware Internet Services LLC (ARIN); resources moved: 172.83.128.0/21"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200913.gz","retrieved_at":"2026-10-12T22:30:14+00:00","summary":"ARIN delegated statistics 2020-09-13 (produced 2020-09-13T14:00:13+00:00), before the report: allocated (dated 2018-01-18)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200915.gz","retrieved_at":"2026-10-12T22:30:19+00:00","summary":"ARIN delegated statistics 2020-09-15 (produced 2020-09-15T14:00:13+00:00), after the report: allocated (dated 2018-01-18)"}]},{"event_id":"831ba953661a3fb6","registry":"ARIN","report_date":"2018-01-18","source":"arin_issued","raw_action":"ADD","raw_line":"Add 172.83.128.0-172.83.135.255","resource_type":"ipv4","resource":"172.83.128.0/21","start":"172.83.128.0","end":"172.83.135.255","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":"2026-10-13T23:52:03+00:00","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/#e-831ba953661a3fb6","report_page":"https://rirtracker.com/arin/reports/2018-01-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.128.0-172.83.135.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. 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/2018-January/003326.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-18: \"Add 172.83.128.0-172.83.135.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180117.gz","retrieved_at":"2026-10-12T21:40:24+00:00","summary":"ARIN delegated statistics 2018-01-17 (produced 2018-01-17T06:09:25+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180119.gz","retrieved_at":"2026-10-12T21:40:36+00:00","summary":"ARIN delegated statistics 2018-01-19 (produced 2018-01-19T06:09:47+00:00), after the report: allocated (dated 2018-01-18)"}]},{"event_id":"07f26ef159260a40","registry":"ARIN","report_date":"2018-01-18","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.83.128.0-172.83.135.255","resource_type":"ipv4","resource":"172.83.128.0/21","start":"172.83.128.0","end":"172.83.135.255","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":"2026-10-13T23:52:03+00:00","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/#e-07f26ef159260a40","report_page":"https://rirtracker.com/arin/reports/2018-01-18/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.128.0-172.83.135.255.json","explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.128.0-172.83.135.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-January/003326.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-18: \"Remove 172.83.128.0-172.83.135.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180117.gz","retrieved_at":"2026-10-12T21:40:24+00:00","summary":"ARIN delegated statistics 2018-01-17 (produced 2018-01-17T06:09:25+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180119.gz","retrieved_at":"2026-10-12T21:40:36+00:00","summary":"ARIN delegated statistics 2018-01-19 (produced 2018-01-19T06:09:47+00:00), after the report: allocated (dated 2018-01-18)"}]},{"event_id":"b5240064fce0ac25","registry":"ARIN","report_date":"2018-01-14","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 172.83.128.0-172.83.135.255","resource_type":"ipv4","resource":"172.83.128.0/21","start":"172.83.128.0","end":"172.83.135.255","classification":"NO_MATERIAL_CHANGE","classification_label":"No substantive resource change found","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","page":"https://rirtracker.com/ip/172.83.128.0-172.83.135.255/#e-b5240064fce0ac25","report_page":"https://rirtracker.com/arin/reports/2018-01-14/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/172.83.128.0-172.83.135.255.json","explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved).","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2018-January/003322.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-14: \"Remove 172.83.128.0-172.83.135.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180113.gz","retrieved_at":"2026-10-12T21:40:14+00:00","summary":"ARIN delegated statistics 2018-01-13 (produced 2018-01-13T06:09:44+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180115.gz","retrieved_at":"2026-10-12T21:40:19+00:00","summary":"ARIN delegated statistics 2018-01-15 (produced 2018-01-15T06:09:30+00:00), after the report: reserved"}]}],"classification_history":{"c6868cb126ebce31":[{"raw_change_id":167512,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:49:41+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN) on 2020-09-28 19:12 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":167512,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:53+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN) on 2020-09-28 19:12 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":167512,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:39+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN) on 2020-09-28 19:12 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":167512,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:57+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Delaware Internet Services LLC (ARIN) to Citizens Telephone Cooperative (ARIN) on 2020-09-28 19:12 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"7334c42e0e9d6c41":[{"raw_change_id":560964,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:51+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Inspiring Networks LLC (ARIN) to Delaware Internet Services LLC (ARIN) on 2020-09-14 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."}],"831ba953661a3fb6":[{"raw_change_id":153016,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:21+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-14 (172.83.128.0-172.83.135.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153016,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-14 (172.83.128.0-172.83.135.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153016,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. The tracker saw this range released from hold on 2018-01-14 (172.83.128.0-172.83.135.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":153016,"classification_code":"APPARENT_NEW_ISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN."}],"07f26ef159260a40":[{"raw_change_id":152994,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:20+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.128.0-172.83.135.255. The issuance is explained on that line."},{"raw_change_id":152994,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.128.0-172.83.135.255. The issuance is explained on that line."},{"raw_change_id":152994,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.128.0-172.83.135.255. The issuance is explained on that line."},{"raw_change_id":152994,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2018-01-17 and allocated (dated 2018-01-18) on 2018-01-19. ARIN removed its own pool record for this range as part of issuing it: the same report adds 172.83.128.0-172.83.135.255. The issuance is explained on that line."}],"b5240064fce0ac25":[{"raw_change_id":152862,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:12+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":152862,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":152862,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:53+00:00","current":0,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."},{"raw_change_id":152862,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:03+00:00","current":1,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."}]},"arin_statistics_now":{"status":"allocated (dated 2020-09-28)"}}