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 | 319-776 | 3XXX6XXX7XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ROWLEY | IA |
| 2022-03-25 | 319-992 | 0XXX1XXX2XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TIFFIN | IA |
| 2022-03-24 | 319-767 | 0XXX2XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | KEOKUK | IA |
| 2022-03-15 | 319-995 | 1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | WINFIELD | IA |
| 2022-03-14 | 319-566 | 1XXX5XXX6XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | RICHLAND | IA |
| 2022-03-14 | 319-922 | 1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | SALEM | IA |
| 2022-03-10 | 319-733 | 0XXX1XXX3XXX7XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | FARMINGTON | IA |
| 2022-03-10 | 319-997 | 1XXX7XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | NEW LONDON | IA |
| 2022-03-04 | 319-942 | 0XXX2XXX4XXX6XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HILLSBORO | IA |
| 2022-03-04 | 319-996 | 1XXX6XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | HOUGHTON | IA |
| 2022-02-28 | 319-966 | 1XXX6XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | GRANDVIEW | IA |
| 2022-02-24 | 319-588 | 1XXX2XXX5XXX8XXX · 4 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ARGYLE | IA |
| 2022-02-24 | 319-742 | 2XXX6XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | DENMARK | IA |
| 2022-02-18 | 319-675 | 0XXX1XXX3XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | OXFORD | IA |
| 2022-02-17 | 319-426 | 0XXX3XXX · 2 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | FAIRBANK | IA |
| 2022-02-17 | 319-663 | 3XXX5XXX6XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BLAIRSTOWN | IA |
| 2022-02-17 | 319-746 | 7XXX which blocks → | TON80 COMMUNICATIONS, LLC | 516J | BRANDON | 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.