NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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
— 540-327 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WINCHESTER VA
— 540-328 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F STONE MT VA
— 540-330 1XXX which blocks → UNITED STATES CELLULAR - VA 6283 ROANOKE VA
— 540-331 0XXX1XXX8XXX9XXX · 2 holders which blocks → SHENANDOAH TEL. CO. 0250 EDINBURG VA
— 540-332 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-333 0XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 EDINBURG VA
— 540-334 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BOONESMILL VA
— 540-335 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EDINBURG VA
— 540-336 0XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WINCHESTER VA
— 540-337 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-338 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 MT GILEAD VA
— 540-339 2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - VA 6283 ROANOKE VA
— 540-341 5XXX6XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WARRENTON VA
— 540-342 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-343 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-344 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-345 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-347 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WARRENTON VA
— 540-348 2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BROWNSBURG VA
— 540-349 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 WARRENTON VA
— 540-350 not yet reported which blocks → SHENANDOAH TEL. CO. 0236 MOUNTSOLON VA
— 540-351 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 WARRENTON VA
— 540-353 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
— 540-354 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
— 540-355 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
— 540-357 6XXX7XXX8XXX9XXX which blocks → UNITED STATES CELLULAR - VA 6283 CHRISTISBG VA
— 540-358 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K NARROWS VA
— 540-360 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ORANGE VA
— 540-361 0XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-362 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-363 not yet reported which blocks → NEW HOPE TELEPHONE COOPERATIVE 0239 NEW HOPE VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.