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 |
|---|---|---|---|---|---|---|
| — | 541-881 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ONTARIO | OR |
| — | 541-882 | not yet reported which blocks → | QWEST CORPORATION | 9638 | KLAMATHFLS | OR |
| — | 541-883 | not yet reported which blocks → | QWEST CORPORATION | 9638 | KLAMATHFLS | OR |
| — | 541-884 | not yet reported which blocks → | QWEST CORPORATION | 9638 | KLAMATHFLS | OR |
| — | 541-885 | not yet reported which blocks → | QWEST CORPORATION | 9638 | KLAMATHFLS | OR |
| — | 541-889 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ONTARIO | OR |
| — | 541-894 | 7XXX which blocks → | QWEST CORPORATION | 9638 | SUMPTER | OR |
| — | 541-896 | 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | QWEST CORPORATION | 9638 | LEABURG | OR |
| — | 541-899 | not yet reported which blocks → | QWEST CORPORATION | 9638 | JACKSONVL | OR |
| — | 541-902 | 3XXX4XXX5XXX6XXX · 4 holders which blocks → | QWEST CORPORATION | 9638 | FLORENCE | OR |
| — | 541-917 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-918 | 1XXX2XXX3XXX · 2 holders which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-922 | 7XXX8XXX which blocks → | QWEST CORPORATION | 9638 | UMATILLA | OR |
| — | 541-923 | not yet reported which blocks → | QWEST CORPORATION | 9638 | REDMOND | OR |
| — | 541-924 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-926 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-928 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-933 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | QWEST CORPORATION | 9638 | MARCOLA | OR |
| — | 541-935 | not yet reported which blocks → | QWEST CORPORATION | 9638 | VENETA | OR |
| — | 541-937 | 5XXX6XXX7XXX9XXX · 2 holders which blocks → | QWEST CORPORATION | 9638 | LOWELL | OR |
| — | 541-938 | not yet reported which blocks → | QWEST CORPORATION | 9638 | MILTONFWTR | OR |
| — | 541-942 | not yet reported which blocks → | QWEST CORPORATION | 9638 | COTTAGEGRV | OR |
| — | 541-946 | 0XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → | QWEST CORPORATION | 9638 | COTTAGEGRV | OR |
| — | 541-952 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → | QWEST CORPORATION | 9638 | JUNCTIONCY | OR |
| — | 541-955 | not yet reported which blocks → | QWEST CORPORATION | 9638 | GRANTSPASS | OR |
| — | 541-956 | 3XXX4XXX · 2 holders which blocks → | QWEST CORPORATION | 9638 | GRANTSPASS | OR |
| — | 541-957 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ROSEBURG | OR |
| — | 541-966 | 5XXX which blocks → | QWEST CORPORATION | 9638 | PENDLETON | OR |
| — | 541-967 | not yet reported which blocks → | QWEST CORPORATION | 9638 | ALBANY | OR |
| — | 541-984 | not yet reported which blocks → | QWEST CORPORATION | 9638 | EUGENE | OR |
| — | 541-988 | not yet reported which blocks → | QWEST CORPORATION | 9638 | EUGENE | OR |
| — | 541-995 | 0XXX5XXX7XXX · 3 holders which blocks → | QWEST CORPORATION | 9638 | HARRISBURG | OR |
| — | 541-997 | not yet reported which blocks → | QWEST CORPORATION | 9638 | FLORENCE | OR |
| — | 541-998 | not yet reported which blocks → | QWEST CORPORATION | 9638 | JUNCTIONCY | 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.