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 |
|---|---|---|---|---|---|---|
| 2023-10-31 | 681-493 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | PETERSBURG | WV |
| 2023-05-18 | 681-470 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | ELIZABETH | WV |
| 2023-02-17 | 681-449 | 0XXX1XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | WILLIAMSTN | WV |
| 2023-02-17 | 681-450 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | MONTGOMERY | WV |
| 2020-09-24 | 681-347 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | HNTNGTNZN1 | WV |
| 2018-09-04 | 681-243 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | WELLSBURG | WV |
| 2018-08-30 | 681-227 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | FAYETTEVL | WV |
| 2017-09-29 | 681-484 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | LEWISBURG | WV |
| 2015-09-21 | 681-337 | 0XXX1XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | WIDEN | WV |
| 2015-09-04 | 681-628 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WV | 9944 | RICHWOOD | WV |
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.