NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 540-242 1XXX2XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 STAFFORD VA
— 540-243 3XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROCKYMOUNT VA
— 540-245 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-246 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARRISONBG VA
— 540-247 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WINCHESTER VA
— 540-248 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-249 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 GROTTOES VA
— 540-250 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
— 540-253 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 THE PLAINS VA
— 540-254 0XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 BUCHANAN VA
— 540-255 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAUNTON VA
— 540-256 0XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WAYNESBORO VA
— 540-258 3XXX4XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 GLASGOW VA
— 540-260 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHRISTISBG VA
— 540-261 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BUENAVISTA VA
— 540-262 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-264 3XXX4XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BUENAVISTA VA
— 540-265 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-266 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AT&T - LOCAL 7421 ROANOKE VA
— 540-267 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
— 540-268 0XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 SHAWSVILLE VA
— 540-269 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 KEEZLETOWN VA
— 540-270 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
— 540-272 3XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
— 540-273 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
— 540-275 0XXX8XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MOUNTSOLON VA
— 540-279 not yet reported which blocks → MGW TELEPHONE COMPANY, INC. 0238 MOUNTANGRV VA
— 540-280 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
— 540-283 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ROANOKE VA
— 540-286 9XXX which blocks → VERIZON VIRGINIA, INC. 9213 HARTWOOD VA
— 540-287 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
— 540-288 4XXX6XXX7XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-289 0XXX1XXX2XXX3XXX · 4 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MCGAHEYSVL VA
— 540-291 7XXX which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 NATURALBDG VA
— 540-293 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
— 540-294 7XXX which blocks → METROPCS, INC. 5562 STAUNTON VA
— 540-296 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 STONE MT VA
— 540-297 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STONE MT VA
— 540-298 3XXX6XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 ELKTON VA
— 540-302 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 SALEM VA
— 540-309 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 ROANOKE VA
— 540-310 2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-312 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 ROANOKE VA
— 540-314 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
— 540-319 2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEXINGTON VA
— 540-320 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 RADFORD VA
— 540-323 4XXX5XXX6XXX7XXX · 4 holders which blocks → METROPCS, INC. 5562 WINCHESTER VA
— 540-324 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-325 5XXX7XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EDINBURG VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.