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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 540-556 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROANOKE 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
— 540-559 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF VIRGINIA, INC. - VA 127G CROWSHMTIT VA
— 540-560 6XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HARRISONBG 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
— 540-564 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-567 not yet reported which blocks → LUMOS TELEPHONE OF BOTETOURT LLC 0249 ORISKANY VA
— 540-568 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-570 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 BUENAVISTA VA
— 540-572 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → UNITED STATES CELLULAR - VA 6283 BUENAVISTA VA
— 540-574 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-576 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 UNION HALL VA
— 540-578 9XXX which blocks → METROPCS, INC. 5562 HARRISONBG VA
— 540-580 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 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
— 540-583 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEDFORD 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
— 540-588 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
— 540-589 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
— 540-592 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → VERIZON VIRGINIA, INC. 9213 UPPERVILLE VA
— 540-593 not yet reported which blocks → CITIZENS TEL. COOP. 0225 BALLARD VA
— 540-599 none assigned yet which blocks → UNITED STATES CELLULAR - VA 6283 PEARISBURG VA
— 540-605 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BLACKSBURG VA
— 540-607 1XXX2XXX3XXX4XXX5XXX8XXX9XXX which blocks → METROPCS, INC. 5562 HARRISONBG VA
— 540-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 540-612 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F HARRISONBG VA
— 540-614 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E ORANGE VA
— 540-615 0XXX1XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HARRISONBG VA
— 540-616 0XXX1XXX2XXX3XXX · 2 holders which blocks → UNITED STATES CELLULAR - VA 6283 DUBLIN VA
— 540-620 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 COVINGTON VA
— 540-622 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-626 not yet reported which blocks → PEMBROKE TEL. COOP. 0243 PEMBROKE VA
— 540-631 none assigned yet which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-633 7XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-635 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-636 not yet reported which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 FRONTROYAL VA
— 540-639 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 RADFORD VA
— 540-641 1XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RADFORD VA
— 540-643 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON VIRGINIA, INC. 9213 DUBLIN VA
— 540-644 3XXX4XXX5XXX7XXX · 3 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-649 8XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WAYNESBORO VA
— 540-651 not yet reported which blocks → CITIZENS TEL. COOP. 0225 LOCUST GRV VA
— 540-652 5XXX7XXX which blocks → BRIGHTSPEED OF VIRGINIA, LLC 0254 SHENANDOAH VA
— 540-653 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-654 0XXX6XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 FREDECKSBG 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.