{"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":"52.129.46.0/23","resource_type":"ipv4","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2022-01-07)"},"current_holder":{"rir":"ARIN","org":"Channel 4 Media USA Inc","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":6716,"date":"2016-04-05T20:08:58Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"E.I. du Pont de Nemours and Co., Inc.","recipient_org":"Channel 4 Media USA Inc","range":"52.129.46.0/23","log":"ARIN"}],"events":[{"event_id":"303e4655b29b171a","registry":"ARIN","report_date":"2022-01-07","source":"arin_issued","raw_action":"ADD","raw_line":"Add 52.129.46.0-52.129.47.255","resource_type":"ipv4","resource":"52.129.46.0/23","start":"52.129.46.0","end":"52.129.47.255","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":"2026-10-13T23:53:18+00:00","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/#e-303e4655b29b171a","report_page":"https://rirtracker.com/arin/reports/2022-01-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/52.129.46.0-52.129.47.255.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. The tracker saw this range released from hold on 2022-01-05 (52.129.46.0-52.129.47.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2022-January/004774.html","retrieved_at":"2026-10-12T18:41:36+00:00","summary":"ARIN-Issued report for 2022-01-07: \"Add 52.129.46.0-52.129.47.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220106.gz","retrieved_at":"2026-10-12T22:54:55+00:00","summary":"ARIN delegated statistics 2022-01-06 (produced 2022-01-06T14:00:13+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220108.gz","retrieved_at":"2026-10-12T22:55:00+00:00","summary":"ARIN delegated statistics 2022-01-08 (produced 2022-01-08T14:00:12+00:00), after the report: allocated (dated 2022-01-07)"}]},{"event_id":"cf48843beb9469ff","registry":"ARIN","report_date":"2022-01-07","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 52.129.46.0-52.129.47.255","resource_type":"ipv4","resource":"52.129.46.0/23","start":"52.129.46.0","end":"52.129.47.255","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":"2026-10-13T23:53:18+00:00","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/#e-cf48843beb9469ff","report_page":"https://rirtracker.com/arin/reports/2022-01-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/52.129.46.0-52.129.47.255.json","explanation":"ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.46.0-52.129.47.255. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2022-January/004774.html","retrieved_at":"2026-10-12T18:41:36+00:00","summary":"ARIN-Issued report for 2022-01-07: \"Remove 52.129.46.0-52.129.47.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220106.gz","retrieved_at":"2026-10-12T22:54:55+00:00","summary":"ARIN delegated statistics 2022-01-06 (produced 2022-01-06T14:00:13+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220108.gz","retrieved_at":"2026-10-12T22:55:00+00:00","summary":"ARIN delegated statistics 2022-01-08 (produced 2022-01-08T14:00:12+00:00), after the report: allocated (dated 2022-01-07)"}]},{"event_id":"a0d71f3e4de2c086","registry":"ARIN","report_date":"2022-01-05","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 52.129.46.0-52.129.47.255","resource_type":"ipv4","resource":"52.129.46.0/23","start":"52.129.46.0","end":"52.129.47.255","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":"2026-10-13T23:53:18+00:00","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/#e-a0d71f3e4de2c086","report_page":"https://rirtracker.com/arin/reports/2022-01-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/52.129.46.0-52.129.47.255.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/2022-January/004772.html","retrieved_at":"2026-10-12T18:41:36+00:00","summary":"ARIN-Issued report for 2022-01-05: \"Remove 52.129.46.0-52.129.47.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220104.gz","retrieved_at":"2026-10-12T22:54:50+00:00","summary":"ARIN delegated statistics 2022-01-04 (produced 2022-01-04T14:00:13+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220106.gz","retrieved_at":"2026-10-12T22:54:55+00:00","summary":"ARIN delegated statistics 2022-01-06 (produced 2022-01-06T14:00:13+00:00), after the report: reserved"}]},{"event_id":"f16523d31dee2dae","registry":"ARIN","report_date":"2020-07-06","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"52.129.46.0/23","start":"52.129.46.0","end":"52.129.47.255","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":"2026-10-14T00:07:14+00:00","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/#e-f16523d31dee2dae","report_page":"https://rirtracker.com/arin/reports/2020-07-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/52.129.46.0-52.129.47.255.json","observed":"52.129.46.0/23 assigned on 2020-07-06, reserved on 2020-07-07","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":"2020-09-04","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 assigned (dated 2016-04-05) on 2020-07-05 and reserved on 2020-07-07. 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 2020-09-04. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200707.gz","retrieved_at":"2026-10-12T22:26:53+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 52.129.46.0/23 assigned on 2020-07-06, reserved on 2020-07-07"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200705.gz","retrieved_at":"2026-10-12T22:26:48+00:00","summary":"ARIN delegated statistics 2020-07-05 (produced 2020-07-05T14:00:13+00:00), before the report: assigned (dated 2016-04-05)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20200707.gz","retrieved_at":"2026-10-12T22:26:53+00:00","summary":"ARIN delegated statistics 2020-07-07 (produced 2020-07-07T14:00:13+00:00), after the report: reserved"}]},{"event_id":"9c7845ea9416eedd","registry":"ARIN","report_date":"2016-04-05","source":"arin_issued","raw_action":"ADD","raw_line":"Add 52.129.46.0-52.129.47.255","resource_type":"ipv4","resource":"52.129.46.0/23","start":"52.129.46.0","end":"52.129.47.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"E.I. du Pont de Nemours and Co., Inc.","recipient_organization":"Channel 4 Media USA Inc","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:33+00:00","page":"https://rirtracker.com/ip/52.129.46.0-52.129.47.255/#e-9c7845ea9416eedd","report_page":"https://rirtracker.com/arin/reports/2016-04-05/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/52.129.46.0-52.129.47.255.json","piece_of":{"resource":"52.0.0.0/8","page":"https://rirtracker.com/ip/52.0.0.0-52.255.255.255/"},"explanation":"ARIN's transfer log records a transfer from E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN) on 2016-04-05 20:08 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-April/002672.html","retrieved_at":"2026-10-12T18:39:10+00:00","summary":"ARIN-Issued report for 2016-04-05: \"Add 52.129.46.0-52.129.47.255\""},{"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 2016-04-05 20:08 UTC, E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN); resources moved: 52.129.46.0/23"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160404.gz","retrieved_at":"2026-10-12T21:08:28+00:00","summary":"ARIN delegated statistics 2016-04-04 (produced 2016-04-04T05:05:34+00:00), before the report: assigned (dated 1991-12-19)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160406.gz","retrieved_at":"2026-10-12T21:08:33+00:00","summary":"ARIN delegated statistics 2016-04-06 (produced 2016-04-06T05:05:29+00:00), after the report: assigned (dated 2016-04-05)"}]}],"classification_history":{"303e4655b29b171a":[{"raw_change_id":174748,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:45+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. The tracker saw this range released from hold on 2022-01-05 (52.129.46.0-52.129.47.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174748,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:09+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. The tracker saw this range released from hold on 2022-01-05 (52.129.46.0-52.129.47.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174748,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:57+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. The tracker saw this range released from hold on 2022-01-05 (52.129.46.0-52.129.47.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174748,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:18+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. The tracker saw this range released from hold on 2022-01-05 (52.129.46.0-52.129.47.255), so it appears to have been issued again from ARIN's pool."}],"cf48843beb9469ff":[{"raw_change_id":174723,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:44+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.46.0-52.129.47.255. The issuance is explained on that line."},{"raw_change_id":174723,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:09+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.46.0-52.129.47.255. The issuance is explained on that line."},{"raw_change_id":174723,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:57+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.46.0-52.129.47.255. The issuance is explained on that line."},{"raw_change_id":174723,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:18+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2022-01-06 and allocated (dated 2022-01-07) on 2022-01-08. ARIN removed its own pool record for this range as part of issuing it: the same report adds 52.129.46.0-52.129.47.255. The issuance is explained on that line."}],"a0d71f3e4de2c086":[{"raw_change_id":174607,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:39+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":174607,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:09+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":174607,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:57+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":174607,"classification_code":"NO_MATERIAL_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:18+00:00","current":1,"public_explanation":"ARIN-Issued lists it as \"Remove\", but ARIN's statistics show the same record before and after (reserved)."}],"f16523d31dee2dae":[{"raw_change_id":399352,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:39:58+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 assigned (dated 2016-04-05) on 2020-07-05 and reserved on 2020-07-07. 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 2020-09-04. This does not confirm availability."},{"raw_change_id":399352,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:18:51+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 assigned (dated 2016-04-05) on 2020-07-05 and reserved on 2020-07-07. 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 2020-09-04. This does not confirm availability."},{"raw_change_id":399352,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:02:39+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 assigned (dated 2016-04-05) on 2020-07-05 and reserved on 2020-07-07. 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 2020-09-04. This does not confirm availability."},{"raw_change_id":399352,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:07:14+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 assigned (dated 2016-04-05) on 2020-07-05 and reserved on 2020-07-07. 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 2020-09-04. This does not confirm availability."}],"9c7845ea9416eedd":[{"raw_change_id":141272,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:35:04+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN) on 2016-04-05 20:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":141272,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:50+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN) on 2016-04-05 20:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":141272,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:28+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN) on 2016-04-05 20:08 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":141272,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:33+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from E.I. du Pont de Nemours and Co., Inc. (ARIN) to Channel 4 Media USA Inc (ARIN) on 2016-04-05 20:08 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 2022-01-07)"}}