NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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.
Most active assignees, all time — NPA 850
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| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2010-03-03 | 850-717 | 0–9 XXXwhole prefix which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| 2005-11-15 | 850-617 | 0–9 XXXwhole prefix which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| 2005-07-14 | 850-606 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| 2002-09-19 | 850-844 | 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | BONIFAY | FL |
| 2001-03-22 | 850-200 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| 2001-03-22 | 850-306 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | CRESTVIEW | FL |
| 2001-03-22 | 850-307 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | DFUNIAKSPG | FL |
| 2001-03-22 | 850-372 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | MARIANNA | FL |
| 2001-03-22 | 850-373 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | BONIFAY | FL |
| 2001-03-16 | 850-290 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | MADISON | FL |
| — | 850-210 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-216 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-219 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-222 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-224 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-231 | 8XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | SEAGRV BCH | FL |
| — | 850-243 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-244 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-245 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-253 | 2XXX7XXX9XXX · 3 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | MADISON | FL |
| — | 850-267 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | SANROSABCH | FL |
| — | 850-269 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | DESTIN | FL |
| — | 850-297 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-298 | 8XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-301 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-302 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-309 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-314 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-315 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-325 | 0XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-342 | 4XXX8XXX · 2 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | MONTICELLO | FL |
| — | 850-350 | 6XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-352 | 5XXX6XXX8XXX · 3 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | COTTONDALE | FL |
| — | 850-362 | 2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | FTWALTNBCH | FL |
| — | 850-383 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-385 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-386 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-402 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-410 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-412 | none assigned yet which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-413 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-414 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-421 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-422 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-423 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | CRESTVIEW | FL |
| — | 850-425 | 0XXX which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-431 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-482 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | MARIANNA | FL |
| — | 850-487 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
| — | 850-488 | not yet reported which blocks → | CENTURYLINK OF FLORIDA, INC. (CENTRAL) | 0340 | TALLAHASSE | FL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.