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
— 540-439 5XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 REMINGTON VA
— 540-456 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 GREENWOOD VA
— 540-510 0XXX1XXX2XXX5XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-512 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-535 5XXX6XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-536 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-542 9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-543 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 MADISON VA
— 540-545 1XXX5XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-547 1XXX6XXX7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-552 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-553 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-554 0XXX1XXX3XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → VERIZON VIRGINIA, INC. 9213 BLUEMONT VA
— 540-557 8XXX which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-558 3XXX4XXX5XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 BLACKSBURG VA
— 540-561 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-562 8XXX which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-563 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-581 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-582 0XXX1XXX4XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 SPOTSYLVAN VA
— 540-586 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BEDFORD VA
— 540-587 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 BEDFORD VA
— 540-592 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 UPPERVILLE VA
— 540-633 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-639 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-643 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 DUBLIN VA
— 540-654 0XXX6XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-661 6XXX7XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 ORANGE VA
— 540-662 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-665 7XXX which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-667 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-668 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 CATOCTIN VA
— 540-672 none assigned yet which blocks → VERIZON VIRGINIA, INC. 9213 ORANGE VA
— 540-674 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 DUBLIN VA
— 540-678 6XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-687 0XXX1XXX2XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 MIDDLEBURG VA
— 540-710 3XXX4XXX which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-722 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-723 5XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-725 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-726 0XXX1XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 NARROWS VA
— 540-727 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 CULPEPER VA
— 540-731 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-741 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-751 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 MT GILEAD VA
— 540-752 3XXX which blocks → VERIZON VIRGINIA, INC. 9213 HARTWOOD VA
— 540-769 1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-772 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-774 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ROANOKE VA
— 540-776 not yet reported 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.