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 |
|---|---|---|---|---|---|---|
| 2002-05-20 | 810-643 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | MARINECITY | MI |
| 2002-04-12 | 810-600 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | FLINT | MI |
| — | 810-209 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | BYRON | MI |
| — | 810-244 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | FLINT | MI |
| — | 810-249 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | FLINT | MI |
| — | 810-328 | 2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | ST CLAIR | MI |
| — | 810-391 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | FLINT | MI |
| — | 810-455 | 3XXX8XXX which blocks → | PAETEC ITEL, LLC | 829J | PORT HURON | MI |
| — | 810-534 | 7XXX which blocks → | PAETEC ITEL, LLC | 829J | BRIGHTON | MI |
| — | 810-538 | 5XXX which blocks → | PAETEC ITEL, LLC | 829J | LAPEER | MI |
| — | 810-579 | 6XXX which blocks → | PAETEC ITEL, LLC | 829J | GRANDBLANC | MI |
| — | 810-591 | not yet reported which blocks → | PAETEC ITEL, LLC | 829J | FLINT | MI |
| — | 810-593 | none assigned yet which blocks → | PAETEC ITEL, LLC | 829J | FENTON | MI |
| — | 810-605 | 3XXX5XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | FLUSHING | MI |
| — | 810-645 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | PT SANILAC | MI |
| — | 810-670 | 8XXX which blocks → | PAETEC ITEL, LLC | 829J | CLIMTMORRS | MI |
| — | 810-676 | 3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | MARINECITY | MI |
| — | 810-682 | 4XXX which blocks → | PAETEC ITEL, LLC | 829J | SANDUSKY | MI |
| — | 810-824 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PORT HURON | 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.