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 |
|---|---|---|---|---|---|---|
| — | 949-228 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAGUNA BCH | CA |
| — | 949-235 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LAGUNA BCH | CA |
| — | 949-278 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-279 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-283 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-289 | 9XXX which blocks → | T-MOBILE USA, INC. | 6529 | CAPITRNVLY | CA |
| — | 949-302 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-306 | 0XXX which blocks → | T-MOBILE USA, INC. | 6529 | LAGUNA BCH | CA |
| — | 949-307 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-337 | 1XXX4XXX8XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-357 | 0XXX1XXX2XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAGUNA BCH | CA |
| — | 949-400 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-510 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | LAGUNA BCH | CA |
| — | 949-678 | 9XXX which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-689 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-795 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| — | 949-842 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | CAPITRNVLY | CA |
| — | 949-893 | not yet reported which blocks → | T-MOBILE USA, INC. | 6529 | RNCHOVIEJO | CA |
| — | 949-910 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
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.