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
VERIZON VIRGINIA, INC. 156
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 79
NEW CINGULAR WIRELESS PCS, LLC - DC 66
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 64
LEVEL 3 COMMUNICATIONS, LLC - VA 50
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
— 540-387 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 SALEM VA
— 540-389 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 SALEM VA
— 540-391 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → UNITED STATES CELLULAR - VA 6283 CHRISTISBG VA
— 540-392 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 CHRISTISBG VA
— 540-394 0XXX1XXX5XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 CHRISTISBG VA
— 540-396 not yet reported which blocks → MGW TELEPHONE COMPANY, INC. 0238 MCDOWELL VA
— 540-397 5XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
— 540-399 0XXX which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-400 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ROANOKE VA
— 540-405 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELKTON VA
— 540-406 3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GORDONSVL VA
— 540-407 2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MADISON VA
— 540-408 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FREDECKSBG VA
— 540-409 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WINCHESTER VA
— 540-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-414 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
— 540-420 7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROCKYMOUNT VA
— 540-422 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
— 540-423 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-427 6XXX7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-428 5XXX6XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WARRENTON VA
— 540-430 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
— 540-431 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WINCHESTER VA
— 540-432 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-433 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-434 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-435 3XXX5XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HARRISONBG VA
— 540-436 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 TOMS BROOK VA
— 540-437 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F HARRISONBG VA
— 540-438 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-439 5XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 REMINGTON VA
— 540-442 0XXX3XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-443 4XXX6XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BLACKSBURG VA
— 540-444 1XXX3XXX7XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F SALEM VA
— 540-446 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 STAFFORD VA
— 540-447 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WAYNESBORO VA
— 540-448 9XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
— 540-449 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRISTISBG VA
— 540-450 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F WINCHESTER VA
— 540-452 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LURAY VA
— 540-453 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - VA 138E WEYERSCAVE VA
— 540-454 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLEBURG VA
— 540-455 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
— 540-456 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 GREENWOOD VA
— 540-457 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
— 540-458 1XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F LEXINGTON VA
— 540-459 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 WOODSTOCK VA
— 540-460 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEXINGTON VA
— 540-461 8XXX which blocks → METROPCS, INC. 5562 LEXINGTON VA
— 540-462 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LEXINGTON 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.