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 |
|---|---|---|---|---|---|---|
| 2019-01-07 | 226-683 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Emeryville | — |
| 2019-01-07 | 226-684 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Belle River | — |
| 2012-05-29 | 226-675 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | La Salle | — |
| 2012-05-29 | 226-676 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Tecumseh | — |
| 2010-03-18 | 226-673 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Kitchener-Waterloo | — |
| 2010-03-11 | 226-671 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Chatham | — |
| 2010-03-11 | 226-672 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Sarnia | — |
| 2009-07-31 | 226-674 | not yet reported which blocks → | Managed Network Systems Inc. | 2776 | Windsor | — |
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.