NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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 |
|---|---|---|---|---|---|---|
| — | 419-866 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | HOLLAND | OH |
| — | 419-867 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | HOLLAND | OH |
| — | 419-868 | 0XXX which blocks → | OHIO BELL TEL CO | 9321 | HOLLAND | OH |
| — | 419-872 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | PERRYSBURG | OH |
| — | 419-873 | 3XXX5XXX6XXX7XXX · 3 holders which blocks → | OHIO BELL TEL CO | 9321 | PERRYSBURG | OH |
| — | 419-874 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | PERRYSBURG | OH |
| — | 419-877 | 1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → | OHIO BELL TEL CO | 9321 | WHITEHOUSE | OH |
| — | 419-887 | 7XXX9XXX · 2 holders which blocks → | OHIO BELL TEL CO | 9321 | MAUMEE | OH |
| — | 419-891 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | MAUMEE | OH |
| — | 419-893 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | MAUMEE | OH |
| — | 419-897 | 4XXX which blocks → | OHIO BELL TEL CO | 9321 | MAUMEE | OH |
| — | 419-936 | 0XXX4XXX8XXX which blocks → | OHIO BELL TEL CO | 9321 | TOLEDO | OH |
| — | 419-952 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | XXXXXXXXXX | OH |
| — | 419-970 | not yet reported which blocks → | OHIO BELL TEL CO | 9321 | XXXXXXXXXX | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.