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
— 920-745 0XXX4XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 RIPON WI
— 920-746 not yet reported which blocks → WISCONSIN BELL INC 9327 STURGEONBY WI
— 920-747 1XXX2XXX4XXX5XXX6XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 JEFFERSON WI
— 920-748 not yet reported which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0922 RIPON WI
— 920-749 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-751 not yet reported which blocks → WISCONSIN BELL INC 9327 NEENAH WI
— 920-753 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH INC. - WI 0886 MT CALVARY WI
— 920-754 2XXX3XXX6XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 REEDSVILLE WI
— 920-755 0XXX1XXX5XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 MISHICOT WI
— 920-756 none assigned yet which blocks → FRONTIER NORTH INC. - WI 0886 BRILLION WI
— 920-757 2XXX3XXX4XXX8XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-758 not yet reported which blocks → LAKEFIELD TEL. CO. 0896 NEWTONBURG WI
— 920-759 5XXX8XXX · 2 holders which blocks → WISCONSIN BELL INC 9327 KAUKAUNA WI
— 920-763 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → LEVEL 3 TELECOM OF WISCONSIN, LP - WI 7322 BEAVER DAM WI
— 920-765 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUTOMA WI
— 920-766 not yet reported which blocks → WISCONSIN BELL INC 9327 KAUKAUNA WI
— 920-772 6XXX7XXX8XXX · 3 holders which blocks → EASTCOAST TELECOM, INC. 0914 COLLINS WI
— 920-773 6XXX8XXX · 2 holders which blocks → EASTCOAST TELECOM, INC. 0914 ST NAZIANZ WI
— 920-775 1XXX2XXX5XXX6XXX · 3 holders which blocks → EASTCOAST TELECOM, INC. 0914 VALDERS WI
— 920-776 6XXX7XXX8XXX9XXX · 3 holders which blocks → STOCKBRIDGE & SHERWOOD TEL. CO. 0954 TISCHMILLS WI
— 920-779 1XXX2XXX3XXX7XXX · 3 holders which blocks → WISCONSIN BELL INC 9327 HORTONVL WI
— 920-781 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELKHART LK WI
— 920-782 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND WI
— 920-786 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 HORICON WI
— 920-787 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 WAUTOMA WI
— 920-788 not yet reported which blocks → WISCONSIN BELL INC 9327 LTL CHUTE WI
— 920-789 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BERLIN WI
— 920-791 1XXX2XXX3XXX5XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BEAVER DAM WI
— 920-793 0XXX which blocks → FRONTIER NORTH INC. - WI 0886 TWO RIVERS WI
— 920-794 0XXX4XXX9XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 TWO RIVERS WI
— 920-795 1XXX5XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH INC. - WI 0886 JOHNSBURG WI
— 920-800 0XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WI 225C SHERWOOD WI
— 920-801 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 FONDDU LAC WI
— 920-803 not yet reported which blocks → WISCONSIN BELL INC 9327 SHEBOYGAN WI
— 920-810 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 APPLETON WI
— 920-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 920-820 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 BEAVER DAM WI
— 920-821 1XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BEAVER DAM WI
— 920-822 9XXX which blocks → NORTHEAST TEL. CO. 0938 PULASKI WI
— 920-823 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FRONTIER NORTH INC. - WI 0886 JACKSONPT WI
— 920-824 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHEASTERN WISCONSIN, LLC 0884 LTLSTURGEN WI
— 920-825 2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHEASTERN WISCONSIN, LLC 0884 BRUSSELS WI
— 920-826 0XXX1XXX3XXX8XXX · 4 holders which blocks → BAYLAND TEL., INC. 0925 ABRAMS WI
— 920-828 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HOWARDSGRV WI
— 920-829 1XXX2XXX · 2 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0841 LENA WI
— 920-830 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-831 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-832 not yet reported which blocks → WISCONSIN BELL INC 9327 APPLETON WI
— 920-833 3XXX4XXX5XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 1159 SEYMOUR WI
— 920-834 1XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 OCONTO 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.