NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2002-01-28 | 949-354 | 0–9 XXXall 10 · 5 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | SADLBK VLY | CA |
| — | 949-209 | 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | NEWPORTBCH | CA |
| — | 949-266 | 4XXX6XXX7XXX · 3 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | IRVINE | CA |
| — | 949-281 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | LAGUNA BCH | CA |
| — | 949-528 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | SADLBK VLY | CA |
| — | 949-534 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | TRABUCO | CA |
| — | 949-606 | 2XXX3XXX4XXX5XXX6XXX which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | CAPITRNVLY | CA |
| — | 949-625 | 2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | RNCHOVIEJO | CA |
| — | 949-666 | 3XXX4XXX · 2 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | TRABUCO | CA |
| — | 949-767 | 0XXX1XXX6XXX7XXX9XXX · 5 holders which blocks → | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | SADLBK VLY | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.