NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 715
NEW CINGULAR WIRELESS PCS, LLC - IL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 99
FRONTIER NORTH INC. - WI 55
WISCONSIN BELL INC 41
CHARTER IP ENABLED SERVICES, LLC 36
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
— 715-429 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 STANLEY WI
— 715-434 not yet reported which blocks → CTC TELCOM, INC. 7998 RICE LAKE WI
— 715-435 not yet reported which blocks → WOOD COUNTY TEL. CO. 0974 RUDOLPH WI
— 715-440 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MENOMONIE WI
— 715-442 9XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PEPIN WI
— 715-443 0XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 MARATHON WI
— 715-445 1XXX6XXX which blocks → SCANDINAVIA TEL. CO. 0945 IOLA WI
— 715-446 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 HATLEY WI
— 715-447 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 GILMAN WI
— 715-448 0XXX1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 MAIDENROCK WI
— 715-449 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH INC. - WI 0886 BIRNAMWOOD WI
— 715-450 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAU CLAIRE WI
— 715-451 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → UNITED STATES CELLULAR - WI 6274 WISCOSNRPD WI
— 715-452 1XXX3XXX4XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 SHELDON WI
— 715-453 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 TOMAHAWK WI
— 715-454 none assigned yet which blocks → WITTENBERG TEL. CO. 0973 ELDERON WI
— 715-455 not yet reported which blocks → CHIBARDUN TEL. COOP., INC. 0861 PRAIRIFARM WI
— 715-457 5XXX7XXX8XXX9XXX · 4 holders which blocks → CENTRAL STATE TEL. CO 0859 JUNCTIONCY WI
— 715-458 9XXX which blocks → CHIBARDUN TEL. COOP., INC. 0861 CAMERON WI
— 715-459 none assigned yet which blocks → WOOD COUNTY TEL. CO. 0974 WISCOSNRPD WI
— 715-460 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLINTONVL WI
— 715-462 1XXX2XXX5XXX7XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 SPIDERLAKE WI
— 715-463 not yet reported which blocks → FARMERS INDEPENDENT TEL. CO. 0879 GRANTSBURG WI
— 715-466 1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC 0950 MINONG WI
— 715-467 1XXX7XXX8XXX · 2 holders which blocks → SCANDINAVIA TEL. CO. 0945 SCANDINVIA WI
— 715-468 6XXX8XXX which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0970 SHELL LAKE WI
— 715-469 2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF WESTERN WISCONSIN, LLC 0970 SARONA WI
— 715-470 not yet reported which blocks → NEW CELL DBA CELLCOM 6692 WAUSAU WI
— 715-471 1XXX2XXX4XXX6XXX · 3 holders which blocks → TDS METROCOM, LLC 520K EAU CLAIRE WI
— 715-472 not yet reported which blocks → LAKELAND COMMUNICATIONS GROUP, LLC 0902 LUCK WI
— 715-473 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WABENO WI
— 715-474 4XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 KENNAN WI
— 715-476 1XXX4XXX5XXX6XXX · 4 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 MERCER WI
— 715-477 4XXX7XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 EAGLERIVER WI
— 715-478 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 CRANDON WI
— 715-479 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 EAGLERIVER WI
— 715-480 not yet reported which blocks → NORVADO, INC. 8615 EAGLERIVER WI
— 715-482 2XXX3XXX4XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RHINELANDR WI
— 715-483 4XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 STCROIXFLS WI
— 715-484 0XXX1XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 PICKEREL WI
— 715-485 none assigned yet which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BALSAMLAKE WI
— 715-486 5XXX6XXX7XXX · 2 holders which blocks → FRONTIER NORTH INC. - WI 0886 MARSHFIELD WI
— 715-487 2XXX3XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0870 PELICAN LK WI
— 715-488 not yet reported which blocks → FARMERS INDEPENDENT TEL. CO. 0879 TRADE LAKE WI
— 715-489 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH INC. - WI 0886 MATTOON WI
— 715-490 7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RHINELANDR WI
— 715-491 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAU CLAIRE WI
— 715-492 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAU CLAIRE WI
— 715-493 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RHINELANDR WI
— 715-494 1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSCEOLA 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.