NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2005-05-18 | 228-777 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| 2004-03-26 | 228-224 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| 2004-03-15 | 228-337 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BILOXI | MS |
| 2003-04-24 | 228-355 | 4XXX5XXX6XXX7XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | PASCAGOULA | MS |
| 2002-10-14 | 228-239 | 0XXX1XXX2XXX3XXX4XXX5XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BILOXI | MS |
| — | 228-209 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BILOXI | MS |
| — | 228-213 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-263 | 3XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-264 | 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BILOXI | MS |
| — | 228-281 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | PASCAGOULA | MS |
| — | 228-304 | 3XXX5XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BAYSTLOUIS | MS |
| — | 228-305 | 1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | PEARLINGTN | MS |
| — | 228-341 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-357 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-363 | 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | PASSCHRSTN | MS |
| — | 228-365 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | BILOXI | MS |
| — | 228-369 | 2XXX3XXX5XXX6XXX7XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | PASCAGOULA | MS |
| — | 228-380 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-609 | 3XXX4XXX6XXX8XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
| — | 228-760 | 4XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | GULFPORT | MS |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.