NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 SOUTH, INC. - VA (CONTEL) 35
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
2003-07-16 540-469 0–9 XXXall 10 · 8 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
2002-03-19 540-284 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-234 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 WEYERSCAVE VA
— 540-249 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 GROTTOES VA
— 540-269 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 KEEZLETOWN VA
— 540-288 4XXX6XXX7XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-289 0XXX1XXX2XXX3XXX · 4 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MCGAHEYSVL VA
— 540-298 3XXX6XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 ELKTON VA
— 540-377 0XXX1XXX4XXX7XXX8XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 RAPHINE VA
— 540-432 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-433 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-434 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-438 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-442 0XXX3XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-548 5XXX6XXX7XXX9XXX · 4 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 CHANCELLOR VA
— 540-564 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-568 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-574 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-644 3XXX4XXX5XXX7XXX · 3 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-653 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 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
— 540-663 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAHLGREN VA
— 540-720 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 STAFFORD VA
— 540-775 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 KINGGEORGE VA
— 540-785 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 CHANCELLOR VA
— 540-786 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 CHANCELLOR VA
— 540-801 none assigned yet which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HARRISONBG VA
— 540-828 none assigned yet which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 BRIDGEWTR VA
— 540-833 0XXX7XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 EDOM VA
— 540-867 1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 HINTON VA
— 540-879 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 DAYTON VA
— 540-896 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 BROADWAY VA
— 540-972 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 CHANCELLOR VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.