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 |
|---|---|---|---|---|---|---|
| 2021-06-23 | 779-335 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELNYX LLC | 073H | ROCKFORD | IL |
| 2019-12-09 | 779-266 | 0XXX1XXX2XXX3XXX9XXX · 5 holders which blocks → | TELNYX LLC | 073H | LANARK | IL |
| — | 779-222 | 0–9 XXXall 10 · 9 holders which blocks → | TELNYX LLC | 073H | SYCAMORE | IL |
| — | 779-253 | 0–9 XXXall 10 · 6 holders which blocks → | TELNYX LLC | 073H | SO BELOIT | IL |
| — | 779-277 | 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → | TELNYX LLC | 073H | FLANAGAN | IL |
| — | 779-303 | 0–9 XXXall 10 · 4 holders which blocks → | TELNYX LLC | 073H | PLAINFIELD | IL |
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.