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 |
|---|---|---|---|---|---|---|
| 2003-05-20 | 715-880 | 7XXX8XXX · 2 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | NEOPIT | WI |
| 2003-03-03 | 715-506 | 5XXX6XXX7XXX8XXX which blocks → | NEW CELL DBA CELLCOM | 6692 | STRATFORD | WI |
| 2003-03-03 | 715-507 | 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | SPENCER | WI |
| 2003-03-03 | 715-508 | 6XXX which blocks → | NEW CELL DBA CELLCOM | 6692 | GOODMAN | WI |
| 2003-03-03 | 715-509 | 3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | BONDUEL | WI |
| 2003-03-03 | 715-903 | 3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | BIRNAMWOOD | WI |
| 2002-08-26 | 715-881 | 8XXX which blocks → | NEW CELL DBA CELLCOM | 6692 | WITTENBERG | WI |
| — | 715-321 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | STEVENS PT | WI |
| — | 715-370 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-470 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-573 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-581 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-775 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | MARINETTE | WI |
| — | 715-846 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | WAUSAU | WI |
| — | 715-850 | 6XXX7XXX9XXX · 3 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | LAKEWOOD | WI |
| — | 715-851 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | SHAWANO | WI |
| — | 715-853 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | SHAWANO | WI |
| — | 715-923 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | MARINETTE | WI |
| — | 715-927 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | CRIVITZ | WI |
| — | 715-929 | none assigned yet which blocks → | NEW CELL DBA CELLCOM | 6692 | PEMBINE | WI |
| — | 715-938 | not yet reported which blocks → | NEW CELL DBA CELLCOM | 6692 | MARINETTE | WI |
| — | 715-988 | 0XXX1XXX2XXX4XXX · 4 holders which blocks → | NEW CELL DBA CELLCOM | 6692 | NIAGARA | WI |
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.