NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| — | 616-220 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-230 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-270 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-351 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-380 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-397 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-474 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-478 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-479 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-518 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | HOLLAND | MI |
| — | 616-529 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRANDHAVEN | MI |
| — | 616-562 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-563 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | GRAND RPDS | MI |
| — | 616-614 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | IONIA | MI |
| — | 616-713 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | HOLLAND | MI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.