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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2001-09-20 540-915 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ROANOKE VA
2001-08-16 540-413 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DAHLGREN VA
2001-08-16 540-630 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EDINBURG VA
2001-07-17 540-207 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
2001-06-13 540-551 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
2001-06-13 540-591 0XXX1XXX7XXX · 3 holders which blocks → LUMOS TELEPHONE OF BOTETOURT LLC 0249 TROUTVILLE VA
2001-06-13 540-771 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WINCHESTER VA
2001-05-18 540-598 0XXX1XXX2XXX which blocks → UNITED STATES CELLULAR - VA 6283 ROANOKE VA
2001-05-18 540-761 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE VA
2001-05-17 540-515 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - VA 138E BRIDGEWTR VA
2001-05-03 540-290 5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
2001-05-03 540-292 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
2001-05-03 540-421 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HARRISONBG VA
2001-04-16 540-295 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
2001-04-16 540-497 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CULPEPER VA
2001-04-16 540-577 0XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RADFORD VA
2001-04-16 540-691 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → UNITED STATES CELLULAR - VA 6283 COVINGTON VA
2001-03-13 540-490 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 STAUNTON VA
2001-03-13 540-765 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → UNITED STATES CELLULAR - VA 6283 SALEM VA
2001-02-12 540-491 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ROANOKE VA
2001-02-12 540-569 1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
2001-02-12 540-764 4XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
2001-02-12 540-814 3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BURNTCHMNY VA
2001-02-12 540-974 3XXX4XXX5XXX8XXX which blocks → METROPCS, INC. 5562 WINCHESTER VA
2001-01-12 540-689 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HARRISONBG VA
2001-01-12 540-746 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARRISONBG VA
2001-01-12 540-753 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F MARSHALL VA
2001-01-10 540-271 9XXX which blocks → METROPCS, INC. 5562 HARRISONBG VA
2001-01-10 540-585 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 CHRISTISBG VA
2001-01-10 540-784 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 LEXINGTON VA
— 540-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BLACKSBURG VA
— 540-201 not yet reported which blocks → SPOK, INC. 6630 ROANOKE VA
— 540-206 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-208 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F HARRISONBG VA
— 540-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-212 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
— 540-213 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F STAUNTON VA
— 540-216 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WARRENTON VA
— 540-219 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
— 540-220 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
— 540-222 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
— 540-224 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-226 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FREDECKSBG VA
— 540-229 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
— 540-230 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
— 540-231 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BLACKSBURG VA
— 540-232 9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BLACKSBURG VA
— 540-234 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 WEYERSCAVE VA
— 540-239 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 RADFORD VA
— 540-241 none assigned yet which blocks → METROPCS, INC. 5562 WAYNESBORO 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.