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 715
NEW CINGULAR WIRELESS PCS, LLC - IL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 99
FRONTIER NORTH INC. - WI 55
WISCONSIN BELL INC 41
CHARTER IP ENABLED SERVICES, LLC 36
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
— 715-358 0XXX which blocks → FRONTIER NORTH INC. - WI 0886 MINOCQUA WI
— 715-359 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-360 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RHINELANDR 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
— 715-363 none assigned yet which blocks → CHEQUAMEGON COMMUNICATIONS COOPERATIVE, INC. 0860 MAPLE WI
— 715-364 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 POPLAR WI
— 715-365 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-366 not yet reported which blocks → UNION TEL. CO. 0962 ALMOND WI
— 715-367 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RHINELANDR WI
— 715-369 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RHINELANDR WI
— 715-370 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 WAUSAU WI
— 715-371 1XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREDERIC WI
— 715-372 none assigned yet which blocks → CHEQUAMEGON COMMUNICATIONS COOPERATIVE, INC. 0860 IRON RIVER WI
— 715-373 3XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 WASHBURN WI
— 715-374 0XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 LKNEBAGMON WI
— 715-375 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 BENNETT WI
— 715-376 1XXX5XXX7XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 GORDON WI
— 715-377 not yet reported which blocks → WISCONSIN BELL INC 9327 HUDSON WI
— 715-378 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 SOLON SPG WI
— 715-379 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 EAU CLAIRE WI
— 715-381 not yet reported which blocks → WISCONSIN BELL INC 9327 HUDSON WI
— 715-382 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 JIM FALLS WI
— 715-383 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 MARSHFIELD WI
— 715-384 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 MARSHFIELD WI
— 715-385 1XXX5XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 BOULDERJCT WI
— 715-386 not yet reported which blocks → WISCONSIN BELL INC 9327 HUDSON WI
— 715-387 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 MARSHFIELD WI
— 715-389 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 MARSHFIELD WI
— 715-392 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 SUPERIOR WI
— 715-394 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 SUPERIOR WI
— 715-395 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 SUPERIOR WI
— 715-397 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-398 1XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 SUPERIOR WI
— 715-399 1XXX4XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 SUPERIOR WI
— 715-402 1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PEPIN WI
— 715-403 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADYSMITH WI
— 715-404 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JIM FALLS WI
— 715-405 none assigned yet which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0769 BALSAMLAKE WI
— 715-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-412 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUPACA WI
— 715-415 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LADYSMITH WI
— 715-421 none assigned yet which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-422 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-423 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-424 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-425 not yet reported which blocks → WISCONSIN BELL INC 9327 RIVERFALLS WI
— 715-426 not yet reported which blocks → WISCONSIN BELL INC 9327 RIVERFALLS WI
— 715-427 7XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 RIB LAKE WI
— 715-428 none assigned yet which blocks → PRICE COUNTY TEL. CO. 0937 PRENTICE WI

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.