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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 920-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 920-912 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHEBOYGAN WI
— 920-913 not yet reported which blocks → TDS METROCOM, LLC 520K FONDDU LAC WI
— 920-915 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-917 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHEBOYGAN WI
— 920-918 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHEBOYGAN WI
— 920-919 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 SHEBOYGAN WI
— 920-921 not yet reported which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-922 not yet reported which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-923 not yet reported which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-924 not yet reported which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-925 1XXX2XXX4XXX5XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 LEBANON WI
— 920-926 3XXX which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-927 6XXX8XXX9XXX · 3 holders which blocks → RIVERSIDE TELCOM, INC. 0943 REESEVILLE WI
— 920-928 4XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF SOUTHERN WISCONSIN, LLC 0931 FOX LAKE WI
— 920-929 not yet reported which blocks → WISCONSIN BELL INC 9327 FONDDU LAC WI
— 920-941 1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WATERTOWN WI
— 920-946 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 SHEBOYGAN WI
— 920-948 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 FONDDU LAC WI
— 920-950 not yet reported which blocks → WI
— 920-954 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-958 not yet reported which blocks → WI
— 920-959 not yet reported which blocks → WI
— 920-960 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 FONDDU LAC WI
— 920-964 not yet reported which blocks → PAETEC ITEL, LLC 829J DE PERE WI
— 920-965 not yet reported which blocks → PAETEC ITEL, LLC 829J GREEN BAY WI
— 920-966 not yet reported which blocks → PAETEC ITEL, LLC 829J OSHKOSH WI
— 920-967 not yet reported which blocks → PAETEC ITEL, LLC 829J NEENAH WI
— 920-968 not yet reported which blocks → PAETEC ITEL, LLC 829J APPLETON WI
— 920-969 8XXX which blocks → WISCONSIN BELL INC 9327 NEENAH WI
— 920-970 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 FONDDU LAC WI
— 920-973 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 MANITOWOC WI
— 920-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 920-979 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 FONDDU LAC WI
— 920-980 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 SHEBOYGAN WI
— 920-982 not yet reported which blocks → WISCONSIN BELL INC 9327 NEW LONDON WI
— 920-983 not yet reported which blocks → WISCONSIN BELL INC 9327 DE PERE WI
— 920-984 0XXX2XXX7XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 BLACKCREEK WI
— 920-986 4XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 SHIOCTON WI
— 920-987 0XXX1XXX2XXX4XXX6XXX7XXX · 6 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 POY SIPPI WI
— 920-988 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 WATERTOWN WI
— 920-989 9XXX which blocks → STOCKBRIDGE & SHERWOOD TEL. CO. 0954 SHERWOOD WI
— 920-991 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-992 0XXX1XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF SOUTHERN WISCONSIN, LLC 0931 RIO WI
— 920-993 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-994 0XXX1XXX3XXX5XXX6XXX7XXX · 6 holders which blocks → FRONTIER NORTH INC. - WI 0886 RANDOMLAKE WI
— 920-996 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-997 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-999 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 ST CLOUD 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.