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 |
|---|---|---|---|---|---|---|
| 2018-05-24 | 252-250 | 0–9 XXXall 10 · 5 holders which blocks → | CSC VOICE, LLC | 612K | PINETOPS | NC |
| 2014-01-14 | 252-284 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | CSC VOICE, LLC | 612K | ROBERSONVL | NC |
| 2014-01-14 | 252-582 | 0–9 XXXall 10 · 4 holders which blocks → | CSC VOICE, LLC | 612K | LA GRANGE | NC |
| 2014-01-14 | 252-662 | 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → | CSC VOICE, LLC | 612K | VANCEBORO | NC |
| 2013-10-29 | 252-689 | 0–9 XXXall 10 · 4 holders which blocks → | CSC VOICE, LLC | 612K | GREENVILLE | NC |
| — | 252-304 | 0–9 XXXall 10 · 4 holders which blocks → | CSC VOICE, LLC | 612K | AYDEN | NC |
| — | 252-318 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CSC VOICE, LLC | 612K | AYDEN | NC |
| — | 252-416 | 1XXX6XXX7XXX8XXX · 2 holders which blocks → | CSC VOICE, LLC | 612K | VANCEBORO | NC |
| — | 252-685 | 1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CSC VOICE, LLC | 612K | ROBERSONVL | NC |
| — | 252-806 | 1XXX6XXX7XXX8XXX which blocks → | CSC VOICE, LLC | 612K | LA GRANGE | NC |
| — | 252-818 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | CSC VOICE, LLC | 612K | BETHEL | NC |
| — | 252-833 | 0–9 XXXall 10 · 5 holders which blocks → | CSC VOICE, LLC | 612K | WASHINGTON | NC |
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.