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 |
|---|---|---|---|---|---|---|
| — | 231-228 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | GLEN LAKE | MI |
| — | 231-229 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | MOORESTOWN | MI |
| — | 231-271 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | SUTTONSBAY | MI |
| — | 231-275 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | LAKE ANN | MI |
| — | 231-325 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | HONOR | MI |
| — | 231-326 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | GLEN LAKE | MI |
| — | 231-328 | 6XXX which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | MERRITT | MI |
| — | 231-334 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | GLEN LAKE | MI |
| — | 231-529 | 4XXX5XXX7XXX · 3 holders which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | BRUTUS | MI |
| — | 231-537 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | LEVERING | MI |
| — | 231-546 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | ELMIRA | MI |
| — | 231-548 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | ALANSON | MI |
| — | 231-549 | 8XXX which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | BOYNEFALLS | MI |
| — | 231-839 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | LAKE CITY | MI |
| — | 231-864 | not yet reported which blocks → | BRIGHTSPEED OF MICHIGAN, LLC | 0702 | BEAR LAKE | 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.