NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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 |
|---|---|---|---|---|---|---|
| — | 507-228 | 2XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | LAFAYETTE | MN |
| — | 507-274 | 3XXX4XXX7XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | WESTBROOK | MN |
| — | 507-346 | 5XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | SPRING VLY | MN |
| — | 507-425 | none assigned yet which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | FULDA | MN |
| — | 507-426 | 1XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | FAIRFAX | MN |
| — | 507-445 | 4XXX6XXX7XXX8XXX · 3 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | STORDEN | MN |
| — | 507-468 | 3XXX6XXX7XXX8XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | DUNDEE | MN |
| — | 507-478 | 0XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | RUSHMORE | MN |
| — | 507-628 | 0XXX8XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | JEFFERS | MN |
| — | 507-673 | 1XXX3XXX4XXX5XXX6XXX which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | LUVERNE | MN |
| — | 507-752 | 3XXX4XXX8XXX · 3 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | LAMBERTON | MN |
| — | 507-765 | 0XXX1XXX6XXX7XXX · 3 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | PRESTON | MN |
| — | 507-767 | 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | KELLOGG | MN |
| — | 507-793 | 3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | HERON LAKE | MN |
| — | 507-834 | 5XXX7XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | GIBBON | MN |
| — | 507-842 | 7XXX8XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | BREWSTER | MN |
| — | 507-872 | 7XXX8XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | MINNEOTA | MN |
| — | 507-926 | 3XXX6XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | WILMONT | MN |
| — | 507-945 | 3XXX4XXX6XXX · 2 holders which blocks → | CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK | 1445 | ROUND LAKE | MN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.