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 |
|---|---|---|---|---|---|---|
| 2006-11-03 | 956-681 | 0–9 XXXall 10 · 2 holders which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | MCALLEN | TX |
| 2005-05-24 | 956-567 | 0–9 XXXall 10 · 10 holders which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | EDCOUCH | TX |
| 2003-06-02 | 956-259 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | EDINBURG | TX |
| 2003-06-02 | 956-260 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | MERCEDES | TX |
| 2003-04-17 | 956-213 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | MCALLEN | TX |
| 2003-04-17 | 956-214 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | BROWNSVL | TX |
| 2003-04-17 | 956-216 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | HARLINGEN | TX |
| 2003-04-17 | 956-218 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | LAREDO | TX |
| — | 956-657 | not yet reported which blocks → | SMARTCOM TELEPHONE, LLC | 4866 | MCALLEN | TX |
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.