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 608
WISCONSIN BELL INC 80
UNITED STATES CELLULAR - WI 76
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 54
FRONTIER NORTH INC. - WI 53
ONVOY, LLC - WI 50
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
— 608-780 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
— 608-781 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-782 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-783 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-784 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-785 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-786 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 WEST SALEM WI
— 608-787 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-788 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-789 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-790 9XXX which blocks → UNITED STATES CELLULAR - WI 6274 LA CROSSE WI
— 608-791 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-792 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 LA CROSSE WI
— 608-793 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-794 not yet reported which blocks → FARMERS TEL. CO. 0880 BEETOWN WI
— 608-795 3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 MAZOMANIE WI
— 608-796 not yet reported which blocks → BRIGHTSPEED OF WISCONSIN, LLC 0895 LA CROSSE WI
— 608-797 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
— 608-798 none assigned yet which blocks → MID-PLAINS TEL., INC. 0881 CROSS PL WI
— 608-799 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
— 608-807 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MADISON WI
— 608-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 608-820 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MIDDLETON WI
— 608-821 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-822 1XXX5XXX9XXX · 2 holders which blocks → GRANTLAND TELECOM, INC. 0930 FENNIMORE WI
— 608-823 8XXX which blocks → BRIGHTSPEED OF MIDWEST WISCONSIN, LLC 0913 NORWALK WI
— 608-824 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-825 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 SUNPRAIRIE WI
— 608-826 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-827 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-828 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-829 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-831 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-832 7XXX which blocks → MT. VERNON TEL. CO. 0917 MT VERNON WI
— 608-833 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-834 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 SUNPRAIRIE WI
— 608-835 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 OREGON WI
— 608-836 not yet reported which blocks → MID-PLAINS TEL., INC. 0881 MIDDLETON WI
— 608-837 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 SUNPRAIRIE WI
— 608-838 1XXX which blocks → FRONTIER NORTH INC. - WI 0886 MCFARLAND WI
— 608-839 0XXX2XXX6XXX7XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 COTTAGEGRV WI
— 608-841 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WI 225C MIDDLETON WI
— 608-842 0XXX2XXX4XXX7XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 DE FOREST WI
— 608-845 not yet reported which blocks → MT. VERNON TEL. CO. 0917 VERONA WI
— 608-846 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 DE FOREST WI
— 608-847 0XXX8XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 MAUSTON WI
— 608-848 not yet reported which blocks → MT. VERNON TEL. CO. 0917 VERONA WI
— 608-849 not yet reported which blocks → WAUNAKEE TEL. CO. 0968 WAUNAKEE WI
— 608-850 0XXX7XXX9XXX · 2 holders which blocks → WAUNAKEE TEL. CO. 0968 WAUNAKEE WI
— 608-853 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MAUSTON 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.