NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 540
BRIGHTSPEED OF VIRGINIA, LLC 28
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2001-06-13 540-551 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-258 3XXX4XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 GLASGOW VA
— 540-261 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BUENAVISTA VA
— 540-264 3XXX4XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BUENAVISTA VA
— 540-291 7XXX which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 NATURALBDG VA
— 540-334 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BOONESMILL VA
— 540-348 2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BROWNSBURG VA
— 540-365 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FERRUM VA
— 540-367 0XXX2XXX4XXX6XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FERRUM VA
— 540-462 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LEXINGTON VA
— 540-463 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LEXINGTON VA
— 540-464 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LEXINGTON VA
— 540-482 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 ROCKYMOUNT VA
— 540-483 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 ROCKYMOUNT VA
— 540-484 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 ROCKYMOUNT VA
— 540-489 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 ROCKYMOUNT VA
— 540-576 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 UNION HALL VA
— 540-622 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-631 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-635 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-636 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-652 5XXX7XXX which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 SHENANDOAH VA
— 540-675 4XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 WASHINGTON VA
— 540-719 4XXX6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BURNTCHMNY VA
— 540-721 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BURNTCHMNY VA
— 540-743 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LURAY VA
— 540-778 7XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 STANLEY VA
— 540-843 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LURAY VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.