NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
— 715-457 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
— 715-495 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 EAU CLAIRE WI
— 715-497 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 EAU CLAIRE WI
— 715-498 none assigned yet which blocks → UNITED STATES CELLULAR - WI 6274 STEVENS PT WI
— 715-499 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RHINELANDR WI
— 715-505 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MENOMONIE WI
— 715-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 715-518 5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARK FALLS WI
— 715-519 2XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 CORNELL WI
— 715-520 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPOONER WI
— 715-523 2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 EAU CLAIRE WI
— 715-524 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 SHAWANO WI
— 715-526 not yet reported which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 SHAWANO WI
— 715-528 6XXX which blocks → NIAGARA TEL. CO. 0920 FLORENCE WI
— 715-532 8XXX which blocks → BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC 0924 LADYSMITH WI
— 715-535 5XXX6XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF WISCONSIN LLC 0964 TIGERTON WI
— 715-536 not yet reported which blocks → FRONTIER NORTH INC. - WI 0886 MERRILL WI
— 715-537 0XXX4XXX7XXX8XXX · 4 holders which blocks → TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK 1155 BARRON WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.