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 |
|---|---|---|---|---|---|---|
| 2017-10-30 | 785-390 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | JUNCTIONCY | KS |
| — | 785-215 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | TOPEKA | KS |
| — | 785-319 | 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SILVERLAKE | KS |
| — | 785-320 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MANHATTAN | KS |
| — | 785-339 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | TOPEKA | KS |
| — | 785-360 | 2XXX3XXX7XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | PERRY | KS |
| — | 785-400 | 0XXX1XXX2XXX4XXX6XXX7XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | MERIDEN | KS |
| — | 785-404 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SALINA | KS |
| — | 785-503 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | LECOMPTON | KS |
| — | 785-518 | 0–9 XXXwhole prefix which blocks → | COMCAST IP PHONE, LLC | 318J | SALINA | KS |
| — | 785-579 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | JUNCTIONCY | KS |
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.