NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 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, all time — NPA 715
TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 31
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
— 715-234 not yet reported which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 RICE LAKE WI
— 715-236 9XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 RICE LAKE WI
— 715-262 2XXX6XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PRESCOTT WI
— 715-264 0XXX1XXX5XXX7XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 GLIDDEN WI
— 715-265 2XXX3XXX5XXX8XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 GLENWOODCY WI
— 715-266 6XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WINTER WI
— 715-274 1XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 MELLEN WI
— 715-276 0XXX5XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 LAKEWOOD WI
— 715-354 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BIRCHWOOD WI
— 715-442 9XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PEPIN WI
— 715-448 0XXX1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 MAIDENROCK WI
— 715-462 1XXX2XXX5XXX7XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 SPIDERLAKE WI
— 715-473 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WABENO WI
— 715-483 4XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 STCROIXFLS WI
— 715-485 none assigned yet which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BALSAMLAKE WI
— 715-537 0XXX4XXX7XXX8XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BARRON WI
— 715-632 4XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 WHEELER WI
— 715-634 not yet reported which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-638 0XXX1XXX4XXX6XXX7XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 HAYWARD WI
— 715-639 0XXX1XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 ELMWOOD WI
— 715-643 1XXX6XXX8XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BOYCEVILLE WI
— 715-646 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 CENTURIA WI
— 715-647 7XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PLUM CITY WI
— 715-665 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 KNAPP WI
— 715-674 0XXX8XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 LAONA WI
— 715-762 none assigned yet which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 PARK FALLS WI
— 715-766 4XXX5XXX6XXX7XXX · 3 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 SPRINGBRK WI
— 715-769 1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BUTTERNUT WI
— 715-865 7XXX which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 STONE LAKE WI
— 715-879 2XXX7XXX · 2 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 ELK MOUND WI
— 715-962 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 COLFAX 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.