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
— 715-656 2XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 DANBURY WI
— 715-658 not yet reported which blocks → CHIBARDUN TEL. COOP., INC. 0861 SAND CREEK WI
— 715-659 0XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 SPENCER WI
— 715-662 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 TAYLOR WI
— 715-664 none assigned yet which blocks → WEST WISCONSIN TELCOM COOP., INC. 0971 DOWNSVILLE WI
— 715-665 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 KNAPP WI
— 715-667 6XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 BOYD WI
— 715-668 0XXX1XXX3XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 JUMP RIVER WI
— 715-669 6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0959 THORP WI
— 715-671 0XXX1XXX3XXX6XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CUMBERLAND WI
— 715-672 7XXX which blocks → NELSON COMMUNICATIONS COOPERATIVE 0918 DURAND WI
— 715-673 not yet reported which blocks → NELSON COMMUNICATIONS COOPERATIVE 0918 NELSON WI
— 715-674 0XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 LAONA WI
— 715-675 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-676 6XXX7XXX · 2 holders which blocks → CENTRAL STATE TEL. CO 0859 LINDSEY WI
— 715-677 none assigned yet which blocks → AMHERST TEL. CO. 0843 ROSHOLT WI
— 715-678 5XXX7XXX8XXX · 3 holders which blocks → MIDWAY TEL. CO. 0909 STETSONVL WI
— 715-679 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH INC. - WI 0886 WAUSAU WI
— 715-682 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 ASHLAND WI
— 715-683 0XXX3XXX4XXX · 3 holders which blocks → BADGER TELECOM, INC. 0844 CHILI WI
— 715-684 none assigned yet which blocks → BALDWIN TELECOM, INC. 0846 BALDWIN WI
— 715-685 1XXX3XXX4XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 ASHLAND WI
— 715-686 1XXX6XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 PRESQUE IS WI
— 715-687 6XXX which blocks → FRONTIER NORTH INC. - WI 0886 STRATFORD WI
— 715-688 none assigned yet which blocks → BALDWIN TELECOM, INC. 0846 BALDWIN WI
— 715-689 not yet reported which blocks → FARMERS INDEPENDENT TEL. CO. 0879 FALUN WI
— 715-691 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HATLEY WI
— 715-692 0XXX7XXX8XXX9XXX · 2 holders which blocks → MOSINEE TEL. CO. 0915 MOSINEE WI
— 715-693 not yet reported which blocks → MOSINEE TEL. CO. 0915 MOSINEE WI
— 715-694 not yet reported which blocks → TRI-COUNTY TEL. COOP., INC. 0960 PLEASANTVL WI
— 715-695 not yet reported which blocks → TRI-COUNTY TEL. COOP., INC. 0960 STRUM WI
— 715-696 8XXX which blocks → NIAGARA TEL. CO. 0920 SPREADEAGL WI
— 715-698 none assigned yet which blocks → BALDWIN TELECOM, INC. 0846 WOODVILLE WI
— 715-699 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAYWARD WI
— 715-700 not yet reported which blocks → WI
— 715-702 1XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYCEVILLE WI
— 715-703 1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYD WI
— 715-704 1XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLFAX WI
— 715-705 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C CHIPPEWFLS WI
— 715-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-717 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → WISCONSIN BELL INC 9327 EAU CLAIRE WI
— 715-720 not yet reported which blocks → WISCONSIN BELL INC 9327 CHIPPEWFLS WI
— 715-723 not yet reported which blocks → WISCONSIN BELL INC 9327 CHIPPEWFLS WI
— 715-726 5XXX which blocks → WISCONSIN BELL INC 9327 CHIPPEWFLS WI
— 715-727 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WI 225C EAU CLAIRE WI
— 715-732 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 MARINETTE WI
— 715-735 not yet reported which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 MARINETTE WI
— 715-736 not yet reported which blocks → CTC TELCOM, INC. 7998 RICE LAKE WI
— 715-738 4XXX8XXX9XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 CHIPPEWFLS WI
— 715-739 none assigned yet which blocks → CHEQUAMEGON COMMUNICATIONS COOPERATIVE, INC. 0860 DRUMMOND 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.