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
— 703-354 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-355 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-356 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-358 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-359 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-360 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-361 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-362 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 703-363 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-364 5XXX8XXX9XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-365 3XXX which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-366 9XXX which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-367 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-368 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-369 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-370 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-371 none assigned yet which blocks → METROPCS, INC. 5562 WSNGTNZN17 VA
— 703-372 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → STARPOWER COMMUNICATIONS, LLC - VA 8830 ENGLESIDE VA
— 703-373 3XXX6XXX7XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
— 703-375 9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-376 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
— 703-377 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
— 703-378 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-379 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-380 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 703-382 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ENGLESIDE VA
— 703-383 2XXX4XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-384 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-385 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-386 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF VIRGINIA, LLC - VA 7769 WSNGTNZN19 VA
— 703-387 6XXX8XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
— 703-388 6XXX8XXX9XXX · 2 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-389 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → STARPOWER COMMUNICATIONS, LLC - VA 8830 WSNGTNZN19 VA
— 703-390 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-391 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 HERNDON VA
— 703-392 2XXX which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-393 5XXX which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-394 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
— 703-395 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 703-396 not yet reported which blocks → VERIZON SOUTH, INC. - VA (CONTEL) 0233 MANASSAS VA
— 703-397 3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-399 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
— 703-401 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
— 703-402 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
— 703-403 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
— 703-404 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-405 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
— 703-406 not yet reported which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
— 703-407 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
— 703-408 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 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.