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 |
|---|---|---|---|---|---|---|
| 2026-04-02 | 262-570 | 0XXX4XXX · 2 holders which blocks → | TDS METROCOM, LLC | 520K | LAKEGENEVA | WI |
| 2026-04-02 | 262-839 | 0XXX1XXX4XXX · 3 holders which blocks → | TDS METROCOM, LLC | 520K | BURLINGTON | WI |
| 2001-07-03 | 262-345 | 2XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | TDS METROCOM, LLC | 520K | MENOMONFLS | WI |
| — | 262-522 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | WAUKESHA | WI |
| — | 262-746 | 2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | TDS METROCOM, LLC | 520K | PEWAUKEE | WI |
| — | 262-754 | 4XXX5XXX7XXX · 2 holders which blocks → | TDS METROCOM, LLC | 520K | MILWAUKZN2 | WI |
| — | 262-883 | 2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TDS METROCOM, LLC | 520K | PARKSIDE | WI |
| — | 262-898 | 4XXX5XXX which blocks → | TDS METROCOM, LLC | 520K | RACINE | WI |
| — | 262-925 | 2XXX4XXX5XXX which blocks → | TDS METROCOM, LLC | 520K | KENOSHA | 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.