NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
— 703-409 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 703-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX VA
— 703-412 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-413 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-414 9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-415 6XXX8XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-416 9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-417 2XXX5XXX9XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-418 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-419 0XXX3XXX5XXX9XXX · 4 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-421 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-422 not yet reported which blocks → SPOK, INC. 6630 WSNGTNZN08 VA
— 703-424 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
— 703-425 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-426 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-427 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-428 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-429 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
— 703-430 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-431 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
— 703-432 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
— 703-433 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-434 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → STARPOWER COMMUNICATIONS, LLC - VA 8830 HERNDON VA
— 703-435 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-436 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTON VA
— 703-437 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-438 0XXX1XXX5XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-439 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
— 703-440 7XXX which blocks → VERIZON VIRGINIA, INC. 9213 ENGLESIDE VA
— 703-441 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 TRIANGLE VA
— 703-442 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-443 4XXX5XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 LEESBURG VA
— 703-444 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-445 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 TRIANGLE VA
— 703-446 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 LORTON VA
— 703-447 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
— 703-448 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-449 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-450 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-451 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-452 1XXX2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-453 2XXX7XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-454 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
— 703-455 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 ENGLESIDE VA
— 703-456 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-458 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 WSNGTNZN08 VA
— 703-459 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA
— 703-460 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-461 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-462 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 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.