NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 920
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
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
— 920-835 3XXX8XXX · 2 holders which blocks → BAYLAND TELEPHONE, LLC 8614 OCONTO WI
— 920-836 7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF EAST CENTRAL WISCONSIN, LLC 0898 LARSEN WI
— 920-837 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0857 CASCO WI
— 920-839 0XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 BAILEYSHBR WI
— 920-840 1XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-841 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-842 1XXX7XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 SURING WI
— 920-843 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-845 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 LUXEMBURG WI
— 920-846 7XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 OCONTO FLS WI
— 920-847 0XXX1XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → FRONTIER NORTH INC. - WI 0886 WASHIGTNIS WI
— 920-848 1XXX which blocks → BAYLAND TELEPHONE, LLC 8614 OCONTO FLS WI
— 920-849 0XXX which blocks → FRONTIER NORTH INC. - WI 0886 CHILTON WI
— 920-850 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-851 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-853 1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH INC. - WI 0886 HILBERT WI
— 920-854 0XXX3XXX8XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 SISTER BAY WI
— 920-855 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 GILLETT WI
— 920-856 0XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHEASTERN WISCONSIN, LLC 0884 FORESTVL WI
— 920-858 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 APPLETON WI
— 920-863 0XXX7XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 DENMARK WI
— 920-864 0XXX5XXX6XXX · 3 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0970 WAYSIDE WI
— 920-865 5XXX8XXX · 2 holders which blocks → NORTHEAST TEL. CO. 0938 MILLCENTER WI
— 920-866 0XXX4XXX5XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 NEWFRANKEN WI
— 920-867 5XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 WEYAUWEGA WI
— 920-868 0XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 EGG HARBOR WI
— 920-869 9XXX which blocks → NORTHEAST TEL. CO. 0938 ONEIDA WI
— 920-872 0XXX1XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 ROSENDALE WI
— 920-876 6XXX7XXX8XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 ELKHART LK WI
— 920-882 not yet reported which blocks → TDS METROCOM, LLC 520K APPLETON WI
— 920-883 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX which blocks → WISCONSIN BELL INC 9327 GREEN BAY WI
— 920-884 not yet reported which blocks → TDS METROCOM, LLC 520K GREEN BAY WI
— 920-885 not yet reported which blocks → WISCONSIN BELL INC 9327 BEAVER DAM WI
— 920-886 0–9 XXXall 10 · 2 holders which blocks → TDS METROCOM, LLC 520K NEENAH WI
— 920-887 not yet reported which blocks → WISCONSIN BELL INC 9327 BEAVER DAM WI
— 920-888 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H GREEN BAY WI
— 920-889 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 SHEBOYGAN WI
— 920-892 0XXX1XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 PLYMOUTH WI
— 920-893 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 PLYMOUTH WI
— 920-894 0XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 KIEL WI
— 920-897 1XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 COLEMAN WI
— 920-898 0XXX3XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 NEWHOLSTEN WI
— 920-899 not yet reported which blocks → NORTHEAST TEL. CO. 0938 KRAKOW WI
— 920-901 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 MANITOWOC WI
— 920-902 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 OSHKOSH WI
— 920-904 8XXX9XXX which blocks → UNITED STATES CELLULAR - WI 6274 FONDDU LAC WI
— 920-905 6XXX7XXX8XXX which blocks → UNITED STATES CELLULAR - WI 6274 MANITOWOC WI
— 920-906 8XXX which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-907 9XXX which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-910 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 WATERTOWN 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.