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
— 540-845 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
— 540-846 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
— 540-847 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
— 540-848 2XXX3XXX4XXX6XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
— 540-849 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 STAUNTON VA
— 540-850 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
— 540-851 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-852 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 BERGTON VA
— 540-853 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-854 1XXX3XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 UNIONVILLE VA
— 540-855 0XXX1XXX4XXX7XXX8XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-856 not yet reported which blocks → SHENANDOAH TEL. CO. 0250 BASYE VA
— 540-857 8XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-858 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 GORE VA
— 540-862 not yet reported which blocks → LUMOS TELEPHONE LLC 0226 CLIFTNFORG VA
— 540-863 0XXX4XXX5XXX8XXX · 3 holders which blocks → LUMOS TELEPHONE LLC 0226 CLIFTNFORG VA
— 540-864 none assigned yet which blocks → NEW CASTLE TEL. CO. 3029 NEW CASTLE VA
— 540-866 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 STEPHENSCY VA
— 540-867 1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HINTON VA
— 540-868 3XXX5XXX6XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 STEPHENSCY VA
— 540-869 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STEPHENSCY VA
— 540-871 2XXX which blocks → UNITED STATES CELLULAR - VA 6283 BEDFORD VA
— 540-872 1XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 MINERAL VA
— 540-874 1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - VA 6283 BEDFORD VA
— 540-875 0XXX1XXX2XXX3XXX4XXX5XXX · 5 holders which blocks → UNITED STATES CELLULAR - VA 6283 BEDFORD VA
— 540-877 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-878 0XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 WARRENTON VA
— 540-879 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAYTON VA
— 540-882 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 CATOCTIN VA
— 540-884 8XXX9XXX · 2 holders which blocks → LUMOS TELEPHONE OF BOTETOURT LLC 0249 EAGLE ROCK VA
— 540-885 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-886 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-887 5XXX which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON VA
— 540-888 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 GAINESBORO VA
— 540-889 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TELNYX LLC 073H CRAIGSVL VA
— 540-890 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-891 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-892 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-893 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → TELNYX LLC 073H LOUISA VA
— 540-894 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 MINERAL VA
— 540-895 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 BROKENBURG VA
— 540-896 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 BROADWAY VA
— 540-897 1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CASTLE TEL. CO. 3029 PAINT BANK VA
— 540-898 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-899 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-901 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J BROADWAY VA
— 540-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-921 none assigned yet which blocks → VERIZON VIRGINIA, INC. 9213 PEARISBURG VA
— 540-922 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 PEARISBURG VA
— 540-923 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 CRIGLERSVL 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.