NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| — | 712-420 | 7XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | ONAWA | IA |
| — | 712-431 | 4XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | ONAWA | IA |
| — | 712-438 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | CLARINDA | IA |
| — | 712-490 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | SIOUX CITY | IA |
| — | 712-540 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | LE MARS | IA |
| — | 712-541 | 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | LE MARS | IA |
| — | 712-571 | 8XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WESTPHALIA | IA |
| — | 712-579 | 3XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WESTPHALIA | IA |
| — | 712-592 | 5XXX6XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | WOODBINE | IA |
| — | 712-660 | 6XXX7XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | EARLY | IA |
| — | 712-661 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | EARLY | IA |
| — | 712-789 | 6XXX8XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | GRISWOLD | IA |
| — | 712-790 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | CARROLL | IA |
| — | 712-840 | 2XXX4XXX7XXX8XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MAPLETON | IA |
| — | 712-880 | 3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | MAPLETON | IA |
| — | 712-887 | 5XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | ROCKWELLCY | IA |
| — | 712-898 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | SIOUX CITY | IA |
| — | 712-899 | 5XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | SIOUX CITY | IA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.