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
— 715-229 0XXX1XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 OWEN WI
— 715-231 none assigned yet which blocks → 24-7 TELCOM, INC. - WI 4855 MENOMONIE WI
— 715-232 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONIE WI
— 715-233 8XXX which blocks → WISCONSIN BELL INC 9327 MENOMONIE WI
— 715-234 not yet reported which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 RICE LAKE WI
— 715-235 not yet reported which blocks → WISCONSIN BELL INC 9327 MENOMONIE WI
— 715-236 9XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 RICE LAKE WI
— 715-237 not yet reported which blocks → CITIZENS TEL. COOP., INC. 0863 NEW AUBURN WI
— 715-238 2XXX4XXX6XXX · 3 holders which blocks → BADGER TELECOM, INC. 0844 GRANTON WI
— 715-239 1XXX2XXX5XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 CORNELL WI
— 715-241 1XXX which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-243 4XXX5XXX9XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 NEWRICHMND WI
— 715-244 2XXX4XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 DAIRYLAND WI
— 715-246 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 NEWRICHMND WI
— 715-247 not yet reported which blocks → SOMERSET TEL. CO., INC. 0951 SOMERSET WI
— 715-248 0XXX2XXX5XXX6XXX8XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0944 STARPRAIRI WI
— 715-249 not yet reported which blocks → UNION TEL. CO. 0962 HANCOCK WI
— 715-251 6XXX which blocks → NIAGARA TEL. CO. 0920 NIAGARA WI
— 715-252 0XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 STEVENS PT WI
— 715-253 none assigned yet which blocks → WITTENBERG TEL. CO. 0973 WITTENBERG WI
— 715-254 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J STEVENS PT WI
— 715-255 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 LOYAL WI
— 715-256 7XXX8XXX which blocks → WISCONSIN BELL INC 9327 WAUPACA WI
— 715-257 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 ATHENS WI
— 715-258 not yet reported which blocks → WISCONSIN BELL INC 9327 WAUPACA WI
— 715-259 none assigned yet which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 WEBB LAKE WI
— 715-261 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-262 2XXX6XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PRESCOTT WI
— 715-263 7XXX which blocks → CLEAR LAKE TEL. CO., INC. 0865 CLEAR LAKE WI
— 715-264 0XXX1XXX5XXX7XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 GLIDDEN WI
— 715-265 2XXX3XXX5XXX8XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 GLENWOODCY WI
— 715-266 6XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WINTER WI
— 715-267 0XXX2XXX8XXX · 3 holders which blocks → BADGER TELECOM, INC. 0844 GREENWOOD WI
— 715-268 not yet reported which blocks → AMERY TELECOM, INC. 0842 AMERY WI
— 715-269 not yet reported which blocks → AMERY TELECOM, INC. 0842 DEER PARK WI
— 715-270 not yet reported which blocks → METRO SOUTHWEST PCS, LLP 9759 WAUPACA WI
— 715-272 0XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 SUGAR CAMP WI
— 715-273 7XXX8XXX9XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 ELLSWORTH WI
— 715-274 1XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 MELLEN WI
— 715-275 0XXX1XXX2XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 ELCHO WI
— 715-276 0XXX5XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 LAKEWOOD WI
— 715-277 6XXX7XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 LKTOMAHAWK WI
— 715-278 none assigned yet which blocks → CHEQUAMEGON COMMUNICATIONS COOPERATIVE, INC. 0860 MARENGO WI
— 715-279 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DURAND WI
— 715-281 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 WAUPACA WI
— 715-282 0XXX1XXX2XXX3XXX4XXX8XXX · 6 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 CRESCENTLK WI
— 715-283 none assigned yet which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 EAU GALLE WI
— 715-284 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 BLCKRIVFLS WI
— 715-285 none assigned yet which blocks → NELSON COMMUNICATIONS COOPERATIVE 0918 ARKANSAW WI
— 715-286 0XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 AUGUSTA 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.