NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 715-836 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
— 715-877 4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 FALL CREEK WI
— 715-878 7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 CLEGHORN WI
— 715-879 2XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 ELK MOUND WI
— 715-882 0XXX1XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 WHITE LAKE WI
— 715-884 1XXX8XXX9XXX · 3 holders which blocks → CENTRAL STATE TEL. CO 0859 PITTSVILLE WI
— 715-885 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 PT EDWARDS WI
— 715-886 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 NEKOOSA WI
— 715-887 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 PT EDWARDS WI
— 715-893 5XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 HURLEY WI
— 715-895 4XXX5XXX6XXX7XXX8XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 EAU CLAIRE WI
— 715-897 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHFIELD WI
— 715-898 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHFIELD WI
— 715-906 not yet reported which blocks → METRO SOUTHWEST PCS, LLP 9759 RHINELANDR WI
— 715-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-921 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLEASON WI
— 715-922 2XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OGEMA WI
— 715-923 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 MARINETTE WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.