{"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":"2001:1938::/32","resource_type":"ipv6","page":"https://rirtracker.com/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff/","statistics_now":{"registry":"ARIN","status":"available"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":27949,"date":"2022-05-06T18:01:46Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Highwinds Network Group, Inc.","recipient_org":"StackPath, LLC.","range":"2001:1938::/32","log":"ARIN"}],"events":[{"event_id":"864f52878f9b806f","registry":"ARIN","report_date":"2025-12-30","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove 2001:1938::-2001:1938:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF","resource_type":"ipv6","resource":"2001:1938::/32","start":"2001:1938::","end":"2001:1938:ffff:ffff:ffff:ffff:ffff:ffff","classification":"HOLD_RELEASED","classification_label":"Released from hold (ARIN lists it as 'available')","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"ARIN's statistics now list it as 'available'; reissue not confirmed","inventory_effect_code":"RELEASED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:43+00:00","page":"https://rirtracker.com/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff/#e-864f52878f9b806f","report_page":"https://rirtracker.com/arin/reports/2025-12-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff.json","explanation":"ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2025-December/006226.html","retrieved_at":"2026-10-12T18:43:16+00:00","summary":"ARIN-Issued report for 2025-12-30: \"Remove 2001:1938::-2001:1938:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251229.gz","retrieved_at":"2026-10-13T00:12:41+00:00","summary":"ARIN delegated statistics 2025-12-29 (produced 2025-12-29T14:00:47+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20251231.gz","retrieved_at":"2026-10-09T19:28:59+00:00","summary":"ARIN delegated statistics 2025-12-31 (produced 2025-12-31T14:00:48+00:00), after the report: available"}]},{"event_id":"d4e7b0c6acbbcf26","registry":"ARIN","report_date":"2024-09-06","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv6","resource":"2001:1938::/32","start":"2001:1938::","end":"2001:1938: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":"2026-10-14T00:12:22+00:00","page":"https://rirtracker.com/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff/#e-d4e7b0c6acbbcf26","report_page":"https://rirtracker.com/arin/reports/2024-09-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff.json","observed":"2001:1938::/32 allocated on 2024-09-06, reserved on 2024-09-07","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":"2025-03-06","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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. 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 2025-03-06. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240907.gz","retrieved_at":"2026-10-12T23:46:20+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 2001:1938::/32 allocated on 2024-09-06, reserved on 2024-09-07"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240905.gz","retrieved_at":"2026-10-12T23:46:05+00:00","summary":"ARIN delegated statistics 2024-09-05 (produced 2024-09-05T13:00:52+00:00), before the report: allocated (dated 2004-02-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20240907.gz","retrieved_at":"2026-10-12T23:46:20+00:00","summary":"ARIN delegated statistics 2024-09-07 (produced 2024-09-07T13:00:52+00:00), after the report: reserved"}]},{"event_id":"d6efcbec486b2bd6","registry":"ARIN","report_date":"2022-05-06","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv6","resource":"2001:1938::/32","start":"2001:1938::","end":"2001:1938: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":"Highwinds Network Group, Inc.","recipient_organization":"StackPath, LLC.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:02+00:00","page":"https://rirtracker.com/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff/#e-d6efcbec486b2bd6","report_page":"https://rirtracker.com/arin/reports/2022-05-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/2001.1938..-2001.1938.ffff.ffff.ffff.ffff.ffff.ffff.json","observed":"Merger/acquisition: Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN) on 2022-05-06 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 2022-05-06 18:01 UTC, Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN); resources moved: 2001:1938::/32"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220505.gz","retrieved_at":"2026-10-12T23:00:53+00:00","summary":"ARIN delegated statistics 2022-05-05 (produced 2022-05-05T13:00:10+00:00), before the report: allocated (dated 2004-02-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220507.gz","retrieved_at":"2026-10-12T23:01:06+00:00","summary":"ARIN delegated statistics 2022-05-07 (produced 2022-05-07T13:00:10+00:00), after the report: allocated (dated 2004-02-23)"}]}],"classification_history":{"864f52878f9b806f":[{"raw_change_id":198569,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T04:09:00+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":198569,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:08:12+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":198569,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:51:07+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."},{"raw_change_id":198569,"classification_code":"HOLD_RELEASED","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:54:43+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2025-12-29 and available on 2025-12-31. ARIN took it out of its reserved (held) records; its statistics now give it the status 'available'. The tracker saw it removed from registration on 2024-09-06, 480 days earlier. That is ARIN's own label: whether and when it is reissued is not confirmed."}],"d4e7b0c6acbbcf26":[{"raw_change_id":469605,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:09:33+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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. 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 2025-03-06. This does not confirm availability."},{"raw_change_id":469605,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:23:02+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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. 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 2025-03-06. This does not confirm availability."},{"raw_change_id":469605,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:07:08+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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. 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 2025-03-06. This does not confirm availability."},{"raw_change_id":469605,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:12:22+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 2004-02-23) on 2024-09-05 and reserved on 2024-09-07. 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 2025-03-06. This does not confirm availability."}],"d6efcbec486b2bd6":[{"raw_change_id":565589,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:02+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Highwinds Network Group, Inc. (ARIN) to StackPath, LLC. (ARIN) on 2022-05-06 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."}]},"arin_statistics_now":{"status":"available"}}