NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 520
BANDWIDTH.COM CLEC, LLC - AZ 272
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-02-23 520-765-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F CASAGRANDE AZ
2024-07-12 520-359-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2024-07-12 520-477-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-282-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-284-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-460-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-540-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-540-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-540-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 520-606-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-10-26 520-649-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-10-11 520-521-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F SAN MANUEL AZ
2022-10-11 520-652-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WHITLOW AZ
2022-10-11 520-657-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F HAYDEN AZ
2022-10-04 520-657-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F HAYDEN AZ
2022-09-25 520-641-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F BENSON AZ
2022-09-25 520-929-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WILLCOX AZ
2022-07-20 520-653-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 520-653-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-06-23 520-640-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 520-605-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-02-15 520-534-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-02-15 520-534-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-02-15 520-534-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-21 520-438-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F WHITLOW AZ
2020-10-08 520-497-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-10-08 520-497-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2020-06-04 520-372-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.