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 |
|---|---|---|---|---|---|---|
| 2013-08-19 | 636-495 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | HIGH RIDGE | MO |
| 2011-04-18 | 636-725 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | FSSCRSTLCY | MO |
| 2007-07-06 | 636-875 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | ST PETERS | MO |
| 2007-06-19 | 636-542 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | OFALLON | MO |
| 2002-08-13 | 636-660 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | FENTON | MO |
| 2001-07-05 | 636-402 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | GRAYSUMMIT | MO |
| — | 636-224 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | HERCUMPVLY | MO |
| — | 636-231 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | WASHINGTON | MO |
| — | 636-321 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | MAXVILLE | MO |
| — | 636-336 | 1XXX2XXX6XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | HARVESTER | MO |
| — | 636-425 | 0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PORTAGSIUX | MO |
| — | 636-449 | 6XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | CHESTERFLD | MO |
| — | 636-549 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | EUREKA | MO |
| — | 636-591 | 1XXX4XXX5XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | MANCHESTER | MO |
| — | 636-669 | 4XXX5XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | ST CHARLES | MO |
| — | 636-674 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | ANTONIA | MO |
| — | 636-680 | 3XXX5XXX6XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | FENTON | MO |
| — | 636-692 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | HIGH RIDGE | MO |
| — | 636-720 | 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | HARVESTER | MO |
| — | 636-741 | 2XXX3XXX4XXX7XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | IMPERIAL | MO |
| — | 636-757 | 3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | ST CHARLES | MO |
| — | 636-779 | 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | MANCHESTER | MO |
| — | 636-812 | 2XXX5XXX6XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | CHESTERFLD | MO |
| — | 636-821 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | POND | MO |
| — | 636-923 | 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | VALLEYPARK | MO |
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.