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 |
|---|---|---|---|---|---|---|
| 2022-03-25 | 641-776 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CHARITON | IA |
| 2022-03-14 | 641-668 | 4XXX6XXX8XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BUSSEY | IA |
| 2022-03-10 | 641-272 | 2XXX7XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BRIDGEWTR | IA |
| 2022-03-04 | 641-727 | 2XXX3XXX7XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BLAKESBURG | IA |
| 2022-02-28 | 641-543 | 3XXX4XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ALTA VISTA | IA |
| 2022-02-28 | 641-966 | 2XXX6XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BLADENSBG | IA |
| 2022-02-24 | 641-837 | 1XXX4XXX8XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ALBIA | IA |
| 2022-02-21 | 641-258 | 2XXX3XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ADAIR | IA |
| 2022-02-21 | 641-266 | 1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ACKLEY | IA |
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.