NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2015-05-04 | 361-415 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ALICE | TX |
| 2006-10-02 | 361-504 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CALALLEN | TX |
| 2006-10-02 | 361-587 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SINTON | TX |
| 2006-10-02 | 361-704 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PORTLDGGRY | TX |
| 2006-10-02 | 361-717 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ARANSSPASS | TX |
| 2006-10-02 | 361-752 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ROBSTOWN | TX |
| 2006-10-02 | 361-792 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | C CHRISTI | TX |
| 2006-10-02 | 361-822 | 0XXX1XXX2XXX4XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | FLOURBLUFF | TX |
| 2006-10-02 | 361-828 | 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | INGLESIDE | TX |
| 2006-10-02 | 361-867 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PADRE IS | TX |
| 2006-05-08 | 361-687 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | C CHRISTI | TX |
| 2003-05-21 | 361-236 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ROBSTOWN | TX |
| 2003-05-21 | 361-238 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | INGLESIDE | TX |
| 2002-06-07 | 361-602 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KINGSVILLE | TX |
| 2002-05-17 | 361-237 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | VICTORIA | TX |
| 2002-05-15 | 361-355 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KINGSVILLE | TX |
| 2002-05-13 | 361-524 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CUERO | TX |
| 2001-12-14 | 361-288 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | C CHRISTI | TX |
| — | 361-245 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HALLETTSVL | TX |
| — | 361-433 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | VICTORIA | TX |
| — | 361-541 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | VICTORIA | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.