NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 262-394 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WALWORTH WI
— 262-395 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILWAUKZN2 WI
— 262-396 0XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → ILLINOIS BELL TEL CO 9329 NO ANTIOCH WI
— 262-397 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 HARTFORD WI
— 262-404 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 THIENSVL WI
— 262-408 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WAUKESHA WI
— 262-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 262-412 not yet reported which blocks → T-MOBILE USA, INC. 6529 RACINE WI
— 262-415 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MENOMONFLS WI
— 262-417 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RACINE WI
— 262-423 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 JACKSON WI
— 262-424 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 MILWAUKZN2 WI
— 262-427 1XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J DELAVAN WI
— 262-428 not yet reported which blocks → SPOK, INC. 6630 WEST BEND WI
— 262-431 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K DOUSMAN WI
— 262-432 not yet reported which blocks → PAETEC ITEL, LLC 829J MILWAUKZN2 WI
— 262-434 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 OCONOMOWOC WI
— 262-436 not yet reported which blocks → PAETEC ITEL, LLC 829J WAUKESHA WI
— 262-437 not yet reported which blocks → PAETEC ITEL, LLC 829J MENOMONFLS WI
— 262-438 6XXX8XXX which blocks → PAETEC ITEL, LLC 829J WEST BEND WI
— 262-446 not yet reported which blocks → WISCONSIN BELL INC 9327 WAUKESHA WI
— 262-451 not yet reported which blocks → SPOK, INC. 6630 WAUKESHA WI
— 262-455 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KENOSHA WI
— 262-456 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RACINE WI
— 262-457 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 HARTFORD WI
— 262-458 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WHITEWATER WI
— 262-465 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MUSKEGO WI
— 262-468 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 OCONOMOWOC WI
— 262-470 9XXX which blocks → UNITED STATES CELLULAR - WI 6274 NO PRAIRIE WI
— 262-472 not yet reported which blocks → WISCONSIN BELL INC 9327 WHITEWATER WI
— 262-473 9XXX which blocks → WISCONSIN BELL INC 9327 WHITEWATER WI
— 262-474 3XXX5XXX6XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CEDARBURG WI
— 262-478 7XXX which blocks → PAETEC ITEL, LLC 829J THIENSVL WI
— 262-483 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 NEWBURG WI
— 262-484 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 KENOSHA WI
— 262-487 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 BURLINGTON WI
— 262-488 6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALEDONIA WI
— 262-490 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OCONOMOWOC WI
— 262-492 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURLINGTON WI
— 262-494 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 KENOSHA WI
— 262-495 5XXX which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 PALMYRA WI
— 262-496 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KENOSHA WI
— 262-497 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RACINE WI
— 262-498 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RACINE WI
— 262-499 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 RACINE WI
— 262-500 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WI 225C WATERFORD WI
— 262-502 5XXX which blocks → WISCONSIN BELL INC 9327 MENOMONFLS WI
— 262-504 0XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 RACINE WI
— 262-506 0XXX4XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WAUKESHA WI
— 262-509 0XXX1XXX7XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MENOMONFLS WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.