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 |
|---|---|---|---|---|---|---|
| — | 503-799 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-801 | 6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TILLAMOOK | OR |
| — | 503-803 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-804 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-805 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-806 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-807 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-816 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-819 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-830 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-860 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-866 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-869 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-880 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-881 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALEM | OR |
| — | 503-887 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-913 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-919 | 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLACKAMAS | OR |
| — | 503-931 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALEM | OR |
| — | 503-970 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| — | 503-989 | 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WOODBURN | OR |
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.