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 |
|---|---|---|---|---|---|---|
| 2022-02-28 | 971-426 | 7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | ESTACADA | OR |
| 2015-08-11 | 971-413 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2014-10-01 | 971-915 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2014-09-19 | 971-712 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2014-01-27 | 971-315 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | AUMSVLTRNR | OR |
| 2013-12-31 | 971-701 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2011-04-04 | 971-266 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2011-03-10 | 971-599 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2005-02-02 | 971-285 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | OR |
| 2004-10-28 | 971-232 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | NORTH PL | OR |
| 2002-05-23 | 971-252 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | STFRD-SNDY | OR |
| 2002-05-20 | 971-248 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | VERNONIA | OR |
| 2002-05-03 | 971-239 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | SALEM | OR |
| 2001-11-07 | 971-238 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEAVERTON | OR |
| — | 971-645 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | PORTLAND | 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.