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 |
|---|---|---|---|---|---|---|
| 2022-01-26 | 737-378 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | KYLE | TX |
| 2022-01-13 | 737-746 | 0XXX1XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BERTRAM | TX |
| 2021-09-03 | 737-678 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DRIPPNGSPG | TX |
| 2021-09-03 | 737-762 | 0–9 XXXall 10 · 9 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | SMITHVILLE | TX |
| 2021-04-29 | 737-742 | 0–9 XXXall 10 · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | AUSTIN | TX |
| 2021-04-08 | 737-828 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | KEMPNER | TX |
| 2021-03-02 | 737-864 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TAYLOR | TX |
| 2021-02-24 | 737-767 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | LAMPASAS | TX |
| 2020-05-08 | 737-825 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | AUSTIN | TX |
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.