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 |
|---|---|---|---|---|---|---|
| 2012-05-10 | 989-394 | 0–9 XXXall 10 · 6 holders which blocks → | 123.NET, LLC | 2550 | BEAVERTON | MI |
| 2005-08-31 | 989-388 | 0–9 XXXall 10 · 5 holders which blocks → | 123.NET, LLC | 2550 | ITHACA | MI |
| 2003-03-31 | 989-278 | 0–9 XXXall 10 · 7 holders which blocks → | 123.NET, LLC | 2550 | ALPENA | MI |
| 2003-02-21 | 989-281 | 0XXX1XXX2XXX4XXX5XXX7XXX · 5 holders which blocks → | 123.NET, LLC | 2550 | ROSCOMMON | MI |
| 2003-02-21 | 989-283 | 0–9 XXXall 10 · 7 holders which blocks → | 123.NET, LLC | 2550 | STANTON | MI |
| 2002-08-12 | 989-229 | not yet reported which blocks → | 123.NET, LLC | 2550 | CLARE | MI |
| 2002-08-12 | 989-322 | not yet reported which blocks → | 123.NET, LLC | 2550 | BAY CITY | MI |
| 2002-08-12 | 989-374 | not yet reported which blocks → | 123.NET, LLC | 2550 | MIDLAND | MI |
| 2002-08-12 | 989-410 | not yet reported which blocks → | 123.NET, LLC | 2550 | BAD AXE | MI |
| 2002-08-12 | 989-437 | not yet reported which blocks → | 123.NET, LLC | 2550 | STANDISH | MI |
| 2002-08-12 | 989-530 | not yet reported which blocks → | 123.NET, LLC | 2550 | AKRON | MI |
| 2002-08-12 | 989-568 | not yet reported which blocks → | 123.NET, LLC | 2550 | ASHLEY | MI |
| 2002-08-12 | 989-571 | not yet reported which blocks → | 123.NET, LLC | 2550 | VASSAR | MI |
| 2002-08-12 | 989-596 | not yet reported which blocks → | 123.NET, LLC | 2550 | SAGINAW | MI |
| 2002-08-12 | 989-605 | not yet reported which blocks → | 123.NET, LLC | 2550 | AUBURN | MI |
| 2002-08-12 | 989-719 | not yet reported which blocks → | 123.NET, LLC | 2550 | CLIFFORD | MI |
| 2002-08-12 | 989-861 | not yet reported which blocks → | 123.NET, LLC | 2550 | OSCODA | MI |
| 2002-08-12 | 989-896 | not yet reported which blocks → | 123.NET, LLC | 2550 | WESTBRANCH | MI |
| 2002-07-29 | 989-472 | 0–9 XXXall 10 · 7 holders which blocks → | 123.NET, LLC | 2550 | OWOSSO | 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.