NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2002-05-29 | 262-732 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | CALEDONIA | WI |
| 2001-05-31 | 262-372 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | SUSSEX | WI |
| — | 262-292 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | THIENSVL | WI |
| — | 262-293 | 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | MENOMONFLS | WI |
| — | 262-346 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | WEST BEND | WI |
| — | 262-364 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | MILWAUKZN2 | WI |
| — | 262-457 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | HARTFORD | WI |
| — | 262-468 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | OCONOMOWOC | WI |
| — | 262-484 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | KENOSHA | WI |
| — | 262-563 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | HARTLAND | WI |
| — | 262-661 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | BURLINGTON | WI |
| — | 262-676 | 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | RACINE | WI |
| — | 262-696 | 1XXX2XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | PEWAUKEE | WI |
| — | 262-953 | not yet reported which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | WAUKESHA | WI |
| — | 262-988 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | PTWASHIGTN | 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.