NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 262
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
— 262-710 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MUSKEGO WI
— 262-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 262-714 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SUSSEX WI
— 262-716 0XXX2XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BURLINGTON WI
— 262-717 5XXX8XXX which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-719 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 HARTLAND WI
— 262-721 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RACINE WI
— 262-723 not yet reported which blocks → STATE LONG DISTANCE TEL. CO. 0955 ELKHORN WI
— 262-724 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 DARIEN WI
— 262-725 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DELAVAN WI
— 262-726 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DARIEN WI
— 262-727 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - WI 225C NORTH LAKE WI
— 262-728 not yet reported which blocks → WISCONSIN BELL INC 9327 DELAVAN WI
— 262-729 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - WI 6274 LAKEGENEVA WI
— 262-730 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 OCONOMOWOC WI
— 262-735 2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MENOMONFLS WI
— 262-736 not yet reported which blocks → SHARON TEL. CO. - WI 0946 SHARON WI
— 262-737 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F PEWAUKEE WI
— 262-740 3XXX5XXX which blocks → WISCONSIN BELL INC 9327 DELAVAN WI
— 262-741 not yet reported which blocks → STATE LONG DISTANCE TEL. CO. 0955 ELKHORN WI
— 262-742 not yet reported which blocks → STATE LONG DISTANCE TEL. CO. 0955 ELKHORN WI
— 262-743 not yet reported which blocks → STATE LONG DISTANCE TEL. CO. 0955 ELKHORN WI
— 262-744 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ALLENTON WI
— 262-745 0XXX which blocks → T-MOBILE USA, INC. 6529 LAKEGENEVA WI
— 262-746 2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → TDS METROCOM, LLC 520K PEWAUKEE WI
— 262-748 0XXX1XXX2XXX4XXX8XXX · 2 holders which blocks → METROPCS, INC. 5562 KENOSHA WI
— 262-749 1XXX2XXX3XXX5XXX7XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DELAVAN WI
— 262-751 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 WAUKESHA WI
— 262-752 3XXX6XXX7XXX8XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 RACINE WI
— 262-753 1XXX3XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WHITEWATER WI
— 262-754 4XXX5XXX7XXX · 2 holders which blocks → TDS METROCOM, LLC 520K MILWAUKZN2 WI
— 262-757 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WISCONSIN BELL INC 9327 BURLINGTON WI
— 262-763 not yet reported which blocks → WISCONSIN BELL INC 9327 BURLINGTON WI
— 262-764 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K KENOSHA WI
— 262-767 not yet reported which blocks → WISCONSIN BELL INC 9327 BURLINGTON WI
— 262-770 3XXX4XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-780 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-781 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-782 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-783 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-784 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-785 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-786 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-787 8XXX which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-789 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-790 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-792 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-794 1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-796 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 WI
— 262-797 not yet reported which blocks → WISCONSIN BELL INC 9327 MILWAUKZN2 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.