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 |
|---|---|---|---|---|---|---|
| 2002-04-02 | 248-493 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | SOUTH LYON | MI |
| 2002-04-02 | 248-899 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | ORTONVILLE | MI |
| 2002-04-02 | 248-913 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | CLARKSTON | MI |
| 2001-02-28 | 248-869 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | NORTHVILLE | MI |
| — | 248-286 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | SOUTHFIELD | MI |
| — | 248-484 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | PONTIAC | MI |
| — | 248-485 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | SOUTHFIELD | MI |
| — | 248-498 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | TROY | MI |
| — | 248-695 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 4632 | BIRMINGHAM | MI |
| — | 248-708 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | HOLLY | MI |
| — | 248-715 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | FARMINGTON | MI |
| — | 248-741 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | FARMINGTON | MI |
| — | 248-751 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | PONTIAC | MI |
| — | 248-769 | not yet reported which blocks → | TELNET WORLDWIDE, INC. | 817J | MILFDWH LK | MI |
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.