{"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":"2604:1a00::/32","resource_type":"ipv6","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2013-02-07)"},"current_holder":{"rir":"ARIN","org":"Zayo Bandwidth","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":44087,"date":"2026-06-01T16:06:28Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Crown Castle Fiber LLC","recipient_org":"Zayo Bandwidth","range":"2604:1a00::/32","log":"ARIN"},{"id":34011,"date":"2024-01-03T20:49:46Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Open Access Inc.","recipient_org":"Crown Castle Fiber LLC","range":"2604:1a00::/32","log":"ARIN"}],"events":[{"event_id":"40efaaed90edcb15","registry":"ARIN","report_date":"2026-06-01","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv6","resource":"2604:1a00::/32","start":"2604:1a00::","end":"2604:1a00:ffff:ffff:ffff:ffff:ffff:ffff","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Crown Castle Fiber LLC","recipient_organization":"Zayo Bandwidth","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:28+00:00","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/#e-40efaaed90edcb15","report_page":"https://rirtracker.com/arin/reports/2026-06-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff.json","observed":"Merger/acquisition: Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN) on 2026-06-01 16:06 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 2026-06-01 16:06 UTC, Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN); resources moved: 2604:1a00::/32"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260531","retrieved_at":"2026-10-09T19:02:06+00:00","summary":"ARIN delegated statistics 2026-05-31 (produced 2026-05-31T13:00:19+00:00), before the report: allocated (dated 2013-02-07)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/delegated-arin-extended-20260602","retrieved_at":"2026-10-09T19:02:12+00:00","summary":"ARIN delegated statistics 2026-06-02 (produced 2026-06-02T13:00:19+00:00), after the report: allocated (dated 2013-02-07)"}]},{"event_id":"370e564c17088b19","registry":"ARIN","report_date":"2024-01-03","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv6","resource":"2604:1a00::/32","start":"2604:1a00::","end":"2604:1a00:ffff:ffff:ffff:ffff:ffff:ffff","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Open Access Inc.","recipient_organization":"Crown Castle Fiber LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/#e-370e564c17088b19","report_page":"https://rirtracker.com/arin/reports/2024-01-03/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff.json","observed":"Merger/acquisition: Open Access Inc. (ARIN) to Crown Castle Fiber LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Open Access Inc. (ARIN) to Crown Castle Fiber LLC (ARIN) on 2024-01-03 20:49 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 2024-01-03 20:49 UTC, Open Access Inc. (ARIN) to Crown Castle Fiber LLC (ARIN); resources moved: 2604:1a00::/32"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240102.gz","retrieved_at":"2026-10-12T23:32:55+00:00","summary":"ARIN delegated statistics 2024-01-02 (produced 2024-01-02T14:00:34+00:00), before the report: allocated (dated 2013-02-07)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240104.gz","retrieved_at":"2026-10-12T23:32:59+00:00","summary":"ARIN delegated statistics 2024-01-04 (produced 2024-01-04T14:00:34+00:00), after the report: allocated (dated 2013-02-07)"}]},{"event_id":"748919b78f127c94","registry":"ARIN","report_date":"2013-02-07","source":"arin_issued","raw_action":"ADD","raw_line":"Add 2604:1A00::-2604:1A00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF","resource_type":"ipv6","resource":"2604:1a00::/32","start":"2604:1a00::","end":"2604:1a00:ffff:ffff:ffff:ffff:ffff:ffff","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":"2026-10-13T23:51:03+00:00","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/#e-748919b78f127c94","report_page":"https://rirtracker.com/arin/reports/2013-02-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range removed from registration on 2012-11-07 (2604:1a00::/32), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2013-February/001519.html","retrieved_at":"2026-10-12T18:37:50+00:00","summary":"ARIN-Issued report for 2013-02-07: \"Add 2604:1A00::-2604:1A00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-20130206.gz","retrieved_at":"2026-10-12T19:54:26+00:00","summary":"ARIN delegated statistics 2013-02-06, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-20130208.gz","retrieved_at":"2026-10-12T19:54:33+00:00","summary":"ARIN delegated statistics 2013-02-08, after the report: allocated (dated 2013-02-07)"}]},{"event_id":"676ba225c2283266","registry":"ARIN","report_date":"2013-02-07","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 2604:1A00::-2604:1A00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF","resource_type":"ipv6","resource":"2604:1a00::/32","start":"2604:1a00::","end":"2604:1a00:ffff:ffff:ffff:ffff:ffff:ffff","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":"2026-10-13T23:51:03+00:00","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/#e-676ba225c2283266","report_page":"https://rirtracker.com/arin/reports/2013-02-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff.json","explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (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/2013-February/001519.html","retrieved_at":"2026-10-12T18:37:50+00:00","summary":"ARIN-Issued report for 2013-02-07: \"Remove 2604:1A00::-2604:1A00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-20130206.gz","retrieved_at":"2026-10-12T19:54:26+00:00","summary":"ARIN delegated statistics 2013-02-06, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2013/delegated-arin-20130208.gz","retrieved_at":"2026-10-12T19:54:33+00:00","summary":"ARIN delegated statistics 2013-02-08, after the report: allocated (dated 2013-02-07)"}]},{"event_id":"09e86657688c88c4","registry":"ARIN","report_date":"2012-11-07","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv6","resource":"2604:1a00::/32","start":"2604:1a00::","end":"2604:1a00:ffff:ffff:ffff:ffff:ffff:ffff","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":"2026-10-13T23:57:46+00:00","page":"https://rirtracker.com/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff/#e-09e86657688c88c4","report_page":"https://rirtracker.com/arin/reports/2012-11-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2604.1a00..-2604.1a00.ffff.ffff.ffff.ffff.ffff.ffff.json","observed":"2604:1a00::/32 allocated on 2012-11-07, not listed on 2012-11-08","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_months":6,"estimated_hold_end":"2013-05-07","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 2010-10-20) on 2012-11-06 and not issued on 2012-11-08. (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 IPv6 space for 6 calendar months before reissuing it, so the estimated hold end is 2013-05-07. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2012/delegated-arin-20121108.gz","retrieved_at":"2026-10-12T19:50:47+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 2604:1a00::/32 allocated on 2012-11-07, not listed on 2012-11-08"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2012/delegated-arin-20121106.gz","retrieved_at":"2026-10-12T19:50:43+00:00","summary":"ARIN delegated statistics 2012-11-06, before the report: allocated (dated 2010-10-20)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2012/delegated-arin-20121108.gz","retrieved_at":"2026-10-12T19:50:47+00:00","summary":"ARIN delegated statistics 2012-11-08, after the report: not issued"}]}],"classification_history":{"40efaaed90edcb15":[{"raw_change_id":576216,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:28+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Crown Castle Fiber LLC (ARIN) to Zayo Bandwidth (ARIN) on 2026-06-01 16:06 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."}],"370e564c17088b19":[{"raw_change_id":569828,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:12+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Open Access Inc. (ARIN) to Crown Castle Fiber LLC (ARIN) on 2024-01-03 20:49 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."}],"748919b78f127c94":[{"raw_change_id":128126,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:19:44+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range removed from registration on 2012-11-07 (2604:1a00::/32), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":128126,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:27+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range removed from registration on 2012-11-07 (2604:1a00::/32), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":128126,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:02+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range removed from registration on 2012-11-07 (2604:1a00::/32), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":128126,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:03+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range removed from registration on 2012-11-07 (2604:1a00::/32), so it appears to have been issued again from ARIN's pool."}],"676ba225c2283266":[{"raw_change_id":128115,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:19:43+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (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":128115,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:27+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (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":128115,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:02+00:00","current":0,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (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":128115,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:03+00:00","current":1,"public_explanation":"ARIN-Issued says \"Remove\", but ARIN's statistics show it not issued on 2013-02-06 and allocated (dated 2013-02-07) on 2013-02-08. (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."}],"09e86657688c88c4":[{"raw_change_id":252004,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:31:45+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 2010-10-20) on 2012-11-06 and not issued on 2012-11-08. (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 IPv6 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2013-05-07. This does not confirm availability."},{"raw_change_id":252004,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:10:51+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 allocated (dated 2010-10-20) on 2012-11-06 and not issued on 2012-11-08. (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 IPv6 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2013-05-07. This does not confirm availability."},{"raw_change_id":252004,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:54:01+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 2010-10-20) on 2012-11-06 and not issued on 2012-11-08. (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 IPv6 space for 6 calendar months before reissuing it, so the earliest estimated hold expiration is 2013-05-07. This does not confirm availability."},{"raw_change_id":252004,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:57:46+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 2010-10-20) on 2012-11-06 and not issued on 2012-11-08. (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 IPv6 space for 6 calendar months before reissuing it, so the estimated hold end is 2013-05-07. This does not confirm availability."}]},"arin_statistics_now":{"status":"allocated (dated 2013-02-07)"}}