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 |
|---|---|---|---|---|---|---|
| — | 330-215 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | AKRON | OH |
| — | 330-229 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | YOUNGSTOWN | OH |
| — | 330-387 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | NILES | OH |
| — | 330-504 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | AKRON | OH |
| — | 330-508 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | CANTON | OH |
| — | 330-512 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | ALLIANCE | OH |
| — | 330-513 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | KENT | OH |
| — | 330-514 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MASSILLON | OH |
| — | 330-560 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | AKRON | OH |
| — | 330-561 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | AKRON | OH |
| — | 330-566 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | CANTON | OH |
| — | 330-570 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | KENT | OH |
| — | 330-579 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | MASSILLON | OH |
| — | 330-585 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | ALLIANCE | OH |
| — | 330-589 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | NILES | OH |
| — | 330-660 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | YOUNGSTOWN | OH |
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.