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
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
— 715-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-819 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 NEILLSVL WI
— 715-821 8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RIVERFALLS WI
— 715-822 0XXX1XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 CUMBERLAND WI
— 715-823 0XXX which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 CLINTONVL WI
— 715-824 not yet reported which blocks → AMHERST TEL. CO. 0843 AMHERST WI
— 715-825 not yet reported which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0902 MILLTOWN WI
— 715-826 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAWKINS WI
— 715-827 1XXX2XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORNELL WI
— 715-828 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAU CLAIRE WI
— 715-829 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAU CLAIRE WI
— 715-830 none assigned yet which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-831 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-832 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-833 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-834 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-835 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-836 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-837 not yet reported which blocks → CHIBARDUN TEL. COOP., INC. 0861 DALLAS WI
— 715-838 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-839 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-841 0XXX9XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-842 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-843 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-845 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-846 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 WAUSAU WI
— 715-847 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-848 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-849 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-850 6XXX7XXX9XXX · 3 holders which blocks → NEW CELL DBA CELLCOM 6692 LAKEWOOD WI
— 715-851 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 SHAWANO WI
— 715-853 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 SHAWANO WI
— 715-854 1XXX5XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 CRIVITZ WI
— 715-855 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-856 0XXX1XXX2XXX4XXX7XXX · 5 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 WAUSAUKEE WI
— 715-857 not yet reported which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0902 FOX CREEK WI
— 715-858 not yet reported which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-859 not yet reported which blocks → CITIZENS TEL. COOP., INC. 0863 CANTON WI
— 715-862 0XXX2XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HURLEY WI
— 715-863 0–9 XXXall 10 · 9 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLINTONVL WI
— 715-865 7XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 STONE LAKE WI
— 715-866 2XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 WEBSTER WI
— 715-868 not yet reported which blocks → BRUCE TEL. CO., INC. 0855 BRUCE WI
— 715-869 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F STEVENS PT WI
— 715-871 not yet reported which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 ELK LAKE WI
— 715-872 not yet reported which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 ELK LAKE WI
— 715-873 0XXX1XXX2XXX5XXX8XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 GLEASON WI
— 715-874 none assigned yet which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 ELK LAKE WI
— 715-875 none assigned yet which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 ROCK FALLS WI
— 715-876 not yet reported which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 ELK LAKE 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.