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 |
|---|---|---|---|---|---|---|
| 2022-02-17 | 937-906 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| 2001-04-19 | 937-806 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | FRANKLIN | OH |
| 2001-01-31 | 937-558 | 2XXX6XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| — | 937-280 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | VANDALIA | OH |
| — | 937-306 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | BEAVERCREK | OH |
| — | 937-310 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | BELLBROOK | OH |
| — | 937-314 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | DONNELSVL | OH |
| — | 937-315 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | MEDWAY | OH |
| — | 937-317 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SPRING VLY | OH |
| — | 937-319 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | YLSPGCLFTN | OH |
| — | 937-340 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | ENON | OH |
| — | 937-343 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | FAIRBORN | OH |
| — | 937-346 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | SPRINGFLD | OH |
| — | 937-347 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | XENIA | OH |
| — | 937-350 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | PAETEC ITEL, LLC | 829J | CENTERVLLE | OH |
| — | 937-352 | 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | XENIA | OH |
| — | 937-353 | 0–9 XXXall 10 · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | MSBGWCRLTN | OH |
| — | 937-381 | 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PIQUA | OH |
| — | 937-387 | 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | VANDALIA | OH |
| — | 937-388 | 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | MSBGWCRLTN | OH |
| — | 937-398 | 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SPRINGFLD | OH |
| — | 937-424 | 2XXX3XXX6XXX7XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| — | 937-458 | 3XXX5XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | BEAVERCREK | OH |
| — | 937-482 | 5XXX6XXX7XXX8XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | FAIRBORN | OH |
| — | 937-853 | 6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | DAYTON | OH |
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.