NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| — | 276-259 | 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | DWIGHT | VA |
| — | 276-322 | 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | BLUEFIELD | VA |
| — | 276-326 | 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | BLUEFIELD | VA |
| — | 276-498 | 0XXX2XXX5XXX9XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | OAKWOOD | VA |
| — | 276-530 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | BIG ROCK | VA |
| — | 276-531 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | MAXIE | VA |
| — | 276-566 | 0XXX1XXX3XXX5XXX6XXX9XXX · 2 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | HURLEY | VA |
| — | 276-596 | 3XXX4XXX which blocks → | VERIZON SOUTH, INC. - VA | 4337 | RICHLANDS | VA |
| — | 276-597 | 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | BIG PRATER | VA |
| — | 276-881 | 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | JEWELL RDG | VA |
| — | 276-928 | 3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | ROCKY GAP | VA |
| — | 276-935 | 9XXX which blocks → | VERIZON SOUTH, INC. - VA | 4337 | GRUNDY | VA |
| — | 276-945 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | POCAHONTAS | VA |
| — | 276-954 | not yet reported which blocks → | VERIZON SOUTH, INC. - VA | 4337 | BLUEFIELD | VA |
| — | 276-963 | not yet reported which blocks → | VERIZON SOUTH, INC. - VA | 4337 | RICHLANDS | VA |
| — | 276-964 | not yet reported which blocks → | VERIZON SOUTH, INC. - VA | 4337 | RICHLANDS | VA |
| — | 276-979 | 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VERIZON SOUTH, INC. - VA | 4337 | TAZEWELL | VA |
| — | 276-988 | not yet reported which blocks → | VERIZON SOUTH, INC. - VA | 4337 | TAZEWELL | VA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.