NumberResearchRecent prefix assignments
0 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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 406-257 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-387 | 0XXX1XXX2XXX6XXX7XXX8XXX · 5 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | HUNGRYHORS | MT |
| — | 406-751 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-752 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-755 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-756 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-758 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | KALISPELL | MT |
| — | 406-837 | 8XXX9XXX · 2 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | BIGFORK | MT |
| — | 406-844 | 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | LAKESIDE | MT |
| — | 406-849 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | ELMO | MT |
| — | 406-854 | 0XXX1XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | MARION | MT |
| — | 406-857 | 0XXX1XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | SOMERS | MT |
| — | 406-862 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | WHITEFISH | MT |
| — | 406-863 | 5XXX6XXX7XXX8XXX · 4 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | WHITEFISH | MT |
| — | 406-881 | 0XXX1XXX3XXX · 3 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | OLNEY | MT |
| — | 406-883 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | POLSON | MT |
| — | 406-884 | 1XXX2XXX4XXX7XXX8XXX · 5 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | POLSON | MT |
| — | 406-886 | 0XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | SWAN LAKE | MT |
| — | 406-887 | 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | FINLEY PT | MT |
| — | 406-892 | not yet reported which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | COLUMBIFLS | MT |
| — | 406-982 | 0XXX1XXX7XXX8XXX9XXX · 5 holders which blocks → | CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK | 2249 | YELLOW BAY | MT |
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.