NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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 |
|---|---|---|---|---|---|---|
| — | 909-260 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-261 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-436 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARROWHEAD | CA |
| — | 909-440 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIALTO | CA |
| — | 909-455 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POMONA | CA |
| — | 909-518 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-519 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-549 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FONTANA | CA |
| — | 909-600 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FONTANA | CA |
| — | 909-633 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HIGHLAND | CA |
| — | 909-638 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-730 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-731 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-732 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-815 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-816 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-837 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | POMONA | CA |
| — | 909-838 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HIGHLAND | CA |
| — | 909-855 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HIGHLAND | CA |
| — | 909-894 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | REDLANDS | CA |
| — | 909-938 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| — | 909-957 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.