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 |
|---|---|---|---|---|---|---|
| — | 240-544 | 4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNG236Z14 | MD |
| — | 240-545 | 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNG236Z15 | MD |
| — | 240-546 | 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNGTNZN16 | MD |
| — | 240-556 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNG236Z14 | MD |
| — | 240-558 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNGTNZN11 | MD |
| — | 240-581 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | LAUREL236 | MD |
| — | 240-646 | 2XXX4XXX6XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | LAUREL236 | MD |
| — | 240-724 | 1XXX2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | WSHNGTNZN6 | MD |
| — | 240-779 | 1XXX3XXX4XXX5XXX6XXX7XXX which blocks → | PAETEC ITEL, LLC | 829J | ASHTON236 | MD |
| — | 240-813 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | GAITHERSBG | MD |
| — | 240-912 | 4XXX5XXX6XXX7XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | GAITHERSBG | MD |
| — | 240-929 | 1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | WSNG236Z14 | MD |
| — | 240-965 | 5XXX6XXX7XXX which blocks → | PAETEC ITEL, LLC | 829J | WSNG236Z13 | MD |
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.