NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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
New assignments by month
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 715-423 | not yet reported which blocks → | WOOD COUNTY TEL. CO. | 0974 | WISCOSNRPD | WI |
| — | 715-424 | not yet reported which blocks → | WOOD COUNTY TEL. CO. | 0974 | WISCOSNRPD | WI |
| — | 715-425 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | RIVERFALLS | WI |
| — | 715-426 | not yet reported which blocks → | WISCONSIN BELL INC | 9327 | RIVERFALLS | WI |
| — | 715-427 | 7XXX which blocks → | FRONTIER COMMUNICATIONS OF WISCONSIN LLC | 0870 | RIB LAKE | WI |
| — | 715-428 | none assigned yet which blocks → | PRICE COUNTY TEL. CO. | 0937 | PRENTICE | WI |
| — | 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 |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.