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 |
|---|---|---|---|---|---|---|
| 2023-03-10 | 920-814 | 0–9 XXXall 10 · 2 holders which blocks → | TDS METROCOM, LLC | 520K | SHEBOYGAN | WI |
| 2023-03-10 | 920-816 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TDS METROCOM, LLC | 520K | MANITOWOC | WI |
| 2016-11-07 | 920-454 | 0–9 XXXall 10 · 3 holders which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| 2014-09-03 | 920-702 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| 2014-09-03 | 920-707 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| 2005-09-02 | 920-560 | 0–9 XXXall 10 · 3 holders which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| 2002-05-17 | 920-548 | 0–9 XXXall 10 · 3 holders which blocks → | TDS METROCOM, LLC | 520K | GREEN BAY | WI |
| — | 920-271 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | GREEN BAY | WI |
| — | 920-281 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| — | 920-292 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | OSHKOSH | WI |
| — | 920-322 | 2XXX4XXX5XXX7XXX · 3 holders which blocks → | TDS METROCOM, LLC | 520K | FONDDU LAC | WI |
| — | 920-347 | 0–9 XXXall 10 · 2 holders which blocks → | TDS METROCOM, LLC | 520K | DE PERE | WI |
| — | 920-651 | 0–9 XXXall 10 · 3 holders which blocks → | TDS METROCOM, LLC | 520K | OSHKOSH | WI |
| — | 920-712 | 0–9 XXXall 10 · 3 holders which blocks → | TDS METROCOM, LLC | 520K | GREEN BAY | WI |
| — | 920-713 | 0XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → | TDS METROCOM, LLC | 520K | GREEN BAY | WI |
| — | 920-882 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | APPLETON | WI |
| — | 920-884 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | GREEN BAY | WI |
| — | 920-886 | 0–9 XXXall 10 · 2 holders which blocks → | TDS METROCOM, LLC | 520K | NEENAH | WI |
| — | 920-913 | not yet reported which blocks → | TDS METROCOM, LLC | 520K | FONDDU LAC | 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.