NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
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
— 540-788 0XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 CALVERTON VA
— 540-822 0XXX1XXX2XXX3XXX7XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 CATOCTIN VA
— 540-825 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-827 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-829 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-831 0XXX3XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-832 4XXX6XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 GORDONSVL VA
— 540-834 3XXX6XXX7XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-837 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 BOYCE VA
— 540-851 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 STAUNTON 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
— 540-857 8XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-858 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 GORE 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
— 540-872 1XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 MINERAL VA
— 540-877 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-882 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 CATOCTIN 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
— 540-890 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
— 540-894 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 MINERAL VA
— 540-895 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 BROKENBURG 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
— 540-921 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
— 540-929 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 BENT MT VA
— 540-937 0XXX1XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-947 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 MONTVALE VA
— 540-948 0XXX1XXX2XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 MADISON VA
— 540-951 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-953 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-954 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-955 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 BERRYVILLE VA
— 540-961 6XXX which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-967 6XXX7XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 LOUISA VA
— 540-977 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-980 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 PULASKI VA
— 540-981 4XXX5XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-982 none assigned yet which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-983 2XXX5XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-985 1XXX7XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.