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 |
|---|---|---|---|---|---|---|
| — | 401-643 | 4XXX5XXX which blocks → | PAETEC ITEL, LLC | 829J | PORTSMOUTH | RI |
| — | 401-656 | 0XXX1XXX4XXX5XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WESTERLY | RI |
| — | 401-659 | 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | CUMBLND HL | RI |
| — | 401-671 | 2XXX which blocks → | PAETEC ITEL, LLC | 829J | WOONSOCKET | RI |
| — | 401-675 | 0XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | NARRAGNSTT | RI |
| — | 401-679 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PROVIDENCE | RI |
| — | 401-681 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WARWICK | RI |
| — | 401-691 | 0XXX1XXX2XXX5XXX6XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | WARWICK | RI |
| — | 401-696 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | PAETEC ITEL, LLC | 829J | PROVIDENCE | RI |
| — | 401-709 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | PROVIDENCE | RI |
| — | 401-712 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PROVIDENCE | RI |
| — | 401-719 | 6XXX which blocks → | PAETEC ITEL, LLC | 829J | CENTREDALE | RI |
| — | 401-775 | 9XXX which blocks → | PAETEC ITEL, LLC | 829J | WOONSOCKET | RI |
| — | 401-777 | 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | LTLCOMPTON | RI |
| — | 401-834 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | PAWTUCKET | RI |
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.