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 540
CITIZENS TELEPHONE COOPERATIVE - VA 10
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
2024-04-09 540-804-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A SHAWSVILLE VA
2020-05-29 540-927-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A BENT MT VA
2018-12-05 540-696-6XXX 6000–6999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A PEARISBURG VA
2014-01-27 540-302-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A SALEM VA
2014-01-27 540-838-8XXX 8000–8999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A RADFORD VA
2014-01-23 540-509-8XXX 8000–8999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A PULASKI VA
2014-01-23 540-585-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A CHRISTISBG VA
2014-01-23 540-643-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A DUBLIN VA
2014-01-22 540-750-8XXX 8000–8999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A BLACKSBURG VA
2013-06-25 540-970-7XXX 7000–7999Assigned CITIZENS TELEPHONE COOPERATIVE - VA 544A ROANOKE VA

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.