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 |
|---|---|---|---|---|---|---|
| 2009-04-28 | 516-444 | 0–9 XXXall 10 · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN02 | NY |
| 2004-11-09 | 516-740 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN04 | NY |
| — | 516-267 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-281 | 4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-282 | 4XXX5XXX6XXX which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-284 | 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN03 | NY |
| — | 516-348 | 3XXX4XXX5XXX6XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN08 | NY |
| — | 516-394 | 3XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-471 | 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-588 | 0–9 XXXall 10 · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN07 | NY |
| — | 516-634 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN06 | NY |
| — | 516-653 | 1XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN08 | NY |
| — | 516-706 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-723 | 1XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN04 | NY |
| — | 516-762 | 0XXX1XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN07 | NY |
| — | 516-821 | 0XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN03 | NY |
| — | 516-941 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | NASSAUZN05 | NY |
| — | 516-977 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | FARMINGDL | NY |
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.