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 |
|---|---|---|---|---|---|---|
| 2013-05-24 | 920-300 | 0XXX1XXX3XXX7XXX8XXX · 4 holders which blocks → | EASTCOAST TELECOM, INC. | 0914 | CLEVELAND | WI |
| — | 920-565 | 9XXX which blocks → | EASTCOAST TELECOM, INC. | 0914 | HOWARDSGRV | WI |
| — | 920-693 | none assigned yet which blocks → | EASTCOAST TELECOM, INC. | 0914 | CLEVELAND | WI |
| — | 920-772 | 6XXX7XXX8XXX · 3 holders which blocks → | EASTCOAST TELECOM, INC. | 0914 | COLLINS | WI |
| — | 920-773 | 6XXX8XXX · 2 holders which blocks → | EASTCOAST TELECOM, INC. | 0914 | ST NAZIANZ | WI |
| — | 920-775 | 1XXX2XXX5XXX6XXX · 3 holders which blocks → | EASTCOAST TELECOM, INC. | 0914 | VALDERS | 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.