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 |
|---|---|---|---|---|---|---|
| — | 903-785 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | PARIS | TX |
| — | 903-786 | 0XXX5XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | POTTSBORO | TX |
| — | 903-796 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | ATLANTA | TX |
| — | 903-799 | 8XXX9XXX which blocks → | SOUTHWESTERN BELL | 9533 | ATLANTA | TX |
| — | 903-853 | 0XXX5XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | PITTSBURG | TX |
| — | 903-855 | 3XXX8XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | PITTSBURG | TX |
| — | 903-856 | 0XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | PITTSBURG | TX |
| — | 903-872 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| — | 903-873 | 0XXX7XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | WILLSPOINT | TX |
| — | 903-874 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| — | 903-875 | 2XXX5XXX6XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| — | 903-877 | 0XXX which blocks → | SOUTHWESTERN BELL | 9533 | OWENTOWN | TX |
| — | 903-881 | 2XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | LINDL SWAN | TX |
| — | 903-882 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | LINDL SWAN | TX |
| — | 903-884 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | OMAHA | TX |
| — | 903-896 | 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | SOUTHWESTERN BELL | 9533 | EDGEWOOD | TX |
| — | 903-901 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | LONGVIEW | TX |
| — | 903-921 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | LONGVIEW | TX |
| — | 903-923 | 4XXX5XXX6XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| — | 903-927 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| — | 903-931 | 1XXX2XXX3XXX4XXX6XXX7XXX9XXX which blocks → | SOUTHWESTERN BELL | 9533 | LONGVIEW | TX |
| — | 903-934 | 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| — | 903-935 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| — | 903-936 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX |
| — | 903-938 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| — | 903-939 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| — | 903-955 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX |
| — | 903-970 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX |
| — | 903-971 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX |
| — | 903-973 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | TX |
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.