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 |
|---|---|---|---|---|---|---|
| 2020-05-08 | 707-831 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLERLAOAKS | CA |
| 2019-10-24 | 707-626 | 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | BOONVILLE | CA |
| 2019-10-07 | 707-828 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | BENICIA | CA |
| 2016-06-27 | 707-806 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ROSA | CA |
| 2015-09-04 | 707-314 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTE RIO | CA |
| 2015-06-12 | 707-842 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | WHITETHORN | CA |
| 2015-05-27 | 707-979 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | MENDOCINO | CA |
| 2015-04-27 | 707-714 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | UKIAH | CA |
| 2015-04-24 | 707-366 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRFLD-SUIS | CA |
| 2015-04-16 | 707-867 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ROSA | CA |
| 2011-11-21 | 707-387 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ROSA | CA |
| 2011-06-01 | 707-883 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | UPPER LAKE | CA |
| 2008-01-14 | 707-500 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | NICE | CA |
| — | 707-241 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | PTLM MAIN | CA |
| — | 707-261 | not yet reported which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | NAPA | CA |
| — | 707-336 | 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | PETROLIA | CA |
| — | 707-341 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | CALISTOGA | CA |
| — | 707-407 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | EUREKA | CA |
| — | 707-413 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | LAKEPORT | CA |
| — | 707-490 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ROSA | CA |
| — | 707-510 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | HOPLAND | CA |
| — | 707-582 | 4XXX6XXX7XXX which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA ROSA | CA |
| — | 707-760 | 3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIO DELL | CA |
| — | 707-969 | 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | FORT BRAGG | CA |
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.