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 |
|---|---|---|---|---|---|---|
| 2022-07-21 | 937-345 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | DAYTON | OH |
| 2022-02-25 | 937-945 | 0XXX1XXX7XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | SOUTHSOLON | OH |
| 2019-05-16 | 937-749 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | PIQUA | OH |
| 2017-01-27 | 937-721 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MAGNETCSPG | OH |
| 2015-06-01 | 937-995 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | FAIRBORN | OH |
| 2015-05-06 | 937-956 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | BEAVERCREK | OH |
| 2015-05-06 | 937-998 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | ENGLEWOOD | OH |
| 2014-08-25 | 937-936 | 0–9 XXXall 10 · 8 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | BOWERSVLLE | OH |
| 2014-04-30 | 937-860 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | YLSPGCLFTN | OH |
| 2014-04-25 | 937-907 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | CENTERVLLE | OH |
| 2012-10-17 | 937-706 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | SOCHARLETN | OH |
| 2011-10-21 | 937-240 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | BELLE CTR | OH |
| 2011-03-10 | 937-966 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | NO HAMPTON | OH |
| 2010-05-25 | 937-715 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | TROTWOOD | OH |
| 2008-05-13 | 937-985 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | DAYTON | OH |
| 2006-02-03 | 937-738 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MARYSVILLE | OH |
| — | 937-530 | 0–9 XXXall 10 · 8 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | MSBGWCRLTN | OH |
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.