NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 715
FRONTIER COMMUNICATIONS OF WISCONSIN LLC 27
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
— 715-243 4XXX5XXX9XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 NEWRICHMND WI
— 715-246 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 NEWRICHMND WI
— 715-248 0XXX2XXX5XXX6XXX8XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 STARPRAIRI WI
— 715-272 0XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 SUGAR CAMP WI
— 715-275 0XXX1XXX2XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 ELCHO WI
— 715-277 6XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 LKTOMAHAWK WI
— 715-282 0XXX1XXX2XXX3XXX4XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 CRESCENTLK WI
— 715-361 8XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-362 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-365 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-369 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-427 7XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RIB LAKE WI
— 715-478 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 CRANDON WI
— 715-487 2XXX3XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 PELICAN LK WI
— 715-524 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 SHAWANO WI
— 715-526 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 SHAWANO WI
— 715-535 5XXX6XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 TIGERTON WI
— 715-649 0XXX2XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 ARGONNE WI
— 715-745 0XXX3XXX5XXX7XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 CECIL WI
— 715-752 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 BEAR CREEK WI
— 715-754 3XXX8XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 MARION WI
— 715-756 3XXX5XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 NEOPIT WI
— 715-787 0XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 GRESHAM WI
— 715-793 0XXX1XXX2XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 BOWLER WI
— 715-799 2XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 KESHENA WI
— 715-823 0XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 CLINTONVL WI
— 715-926 8XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0912 MONDOVI WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.