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
— 540-657 3XXX which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-658 2XXX3XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-659 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-660 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 FRONTROYAL 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
— 540-663 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-664 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 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
— 540-669 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LURAY VA
— 540-671 2XXX4XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 WASHINGTON VA
— 540-672 none assigned yet which blocks → VERIZON VIRGINIA, INC. 9213 ORANGE VA
— 540-673 0XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SHENANDHPK VA
— 540-674 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 DUBLIN VA
— 540-675 4XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 WASHINGTON VA
— 540-677 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LURAY VA
— 540-678 6XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WINCHESTER VA
— 540-682 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
— 540-683 2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 WASHINGTON VA
— 540-684 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 FREDECKSBG VA
— 540-686 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WINCHESTER VA
— 540-687 0XXX1XXX2XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 MIDDLEBURG VA
— 540-700 not yet reported which blocks → VA
— 540-707 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BEDFORD VA
— 540-710 3XXX4XXX which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-715 0–9 XXXall 10 · 5 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 UNIONVILLE VA
— 540-717 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 CULPEPER VA
— 540-718 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 CULPEPER VA
— 540-719 4XXX6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BURNTCHMNY VA
— 540-720 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-721 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 BURNTCHMNY 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
— 540-724 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → TELNYX LLC 073H MARSHALL 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
— 540-729 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CULPEPER VA
— 540-731 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-735 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J FREDECKSBG VA
— 540-736 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CHANCELLOR VA
— 540-737 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HARTWOOD VA
— 540-738 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 MADISON VA
— 540-740 5XXX6XXX7XXX · 3 holders which blocks → SHENANDOAH TEL. CO. 0250 NEW MARKET VA
— 540-741 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG VA
— 540-742 0XXX6XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LURAY VA
— 540-743 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 LURAY 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.