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
— 715-287 not yet reported which blocks → TRI-COUNTY TEL. COOP., INC. 0960 ELEVA WI
— 715-288 1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 EAGLEPOINT WI
— 715-289 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 CADOTT WI
— 715-290 1XXX3XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHELDON WI
— 715-292 5XXX6XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ASHLAND WI
— 715-294 0XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 OSCEOLA WI
— 715-295 4XXX6XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-296 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICE LAKE WI
— 715-297 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUSAU WI
— 715-298 0–9 XXXwhole prefix which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WAUSAU WI
— 715-299 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 BLCKRIVFLS WI
— 715-305 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 MARSHFIELD WI
— 715-306 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 STANLEY WI
— 715-307 3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RIVERFALLS WI
— 715-308 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MENOMONIE WI
— 715-310 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEVENS PT WI
— 715-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-317 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLUM CITY WI
— 715-318 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 EAU CLAIRE WI
— 715-319 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 SUPERIOR WI
— 715-321 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 STEVENS PT WI
— 715-322 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 GLEN FLORA WI
— 715-323 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WISCOSNRPD WI
— 715-324 0XXX1XXX3XXX4XXX · 3 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 PEMBINE WI
— 715-325 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-327 3XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 FREDERIC WI
— 715-329 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 HURLEY WI
— 715-331 1XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 BAYFIELD WI
— 715-332 none assigned yet which blocks → PRICE COUNTY TEL. CO. 0937 SOO LAKE WI
— 715-333 0XXX1XXX3XXX4XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 MERRILLAN WI
— 715-334 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 FAIRCHILD WI
— 715-335 not yet reported which blocks → UNION TEL. CO. 0962 PLAINFIELD WI
— 715-336 1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 GOODMAN WI
— 715-339 none assigned yet which blocks → PRICE COUNTY TEL. CO. 0937 PHILLIPS WI
— 715-340 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 STEVENS PT WI
— 715-341 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-342 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-343 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-344 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-345 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-346 not yet reported which blocks → WISCONSIN BELL INC 9327 STEVENS PT WI
— 715-347 9XXX which blocks → UNITED STATES CELLULAR - WI 6274 STEVENS PT WI
— 715-348 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-349 not yet reported which blocks → SIREN TEL. CO., INC. 0949 SIREN WI
— 715-352 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 EDGAR WI
— 715-353 not yet reported which blocks → INDIANHEAD TEL. CO. 0936 WEYERHAUSR WI
— 715-354 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BIRCHWOOD WI
— 715-355 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-356 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 MINOCQUA WI
— 715-357 not yet reported which blocks → CHIBARDUN TEL. COOP., INC. 0861 ALMENA 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.