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 |
|---|---|---|---|---|---|---|
| 2010-06-16 | 320-399 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | IRVING | MN |
| 2010-06-16 | 320-404 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | SUNBURG | MN |
| 2010-03-17 | 320-379 | 1XXX which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | GRANITEFLS | MN |
| 2006-09-22 | 320-439 | 6XXX which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | HANCOCK | MN |
| 2006-09-22 | 320-565 | 5XXX6XXX · 2 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | CHOKIO | MN |
| 2006-09-22 | 320-569 | 6XXX which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | MAYNARD | MN |
| 2006-09-22 | 320-574 | 6XXX which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | CLARA CITY | MN |
| 2006-09-22 | 320-870 | 0XXX6XXX · 2 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | STARBUCK | MN |
| 2006-05-16 | 320-853 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | MADISON | MN |
| 2006-05-15 | 320-440 | 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | COSMOS | MN |
| 2006-05-15 | 320-993 | 1XXX2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | BROOTEN | MN |
| 2006-05-01 | 320-657 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | GRACEVILLE | MN |
| 2006-04-01 | 320-350 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | DANUBE | MN |
| 2005-02-27 | 320-633 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | BELGRADE | MN |
| 2003-03-01 | 320-343 | 1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → | MCC TELEPHONY OF MINNESOTA, LLC - MN | 719F | CLINTON | MN |
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.