NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 715-317 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
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.