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 |
|---|---|---|---|---|---|---|
| 2015-04-20 | 289-785 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Cooksville | — |
| 2012-06-08 | 289-832 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Maple | — |
| 2012-06-08 | 289-865 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Malton | — |
| 2012-05-31 | 289-864 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Brampton | — |
| 2012-03-28 | 289-861 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Burlington | — |
| 2012-03-28 | 289-862 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Milton | — |
| 2012-03-28 | 289-863 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Oakville | — |
| 2011-10-11 | 289-786 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | St. Catharines-Thorold | — |
| 2008-05-12 | 289-844 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Unionville | — |
| 2008-05-12 | 289-845 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Woodbridge | — |
| 2008-05-12 | 289-846 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Markham | — |
| 2008-05-12 | 289-847 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Port Credit | — |
| 2008-05-12 | 289-848 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Streetsville | — |
| 2008-05-12 | 289-849 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Clarkson | — |
| 2008-05-08 | 289-840 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Aurora | — |
| 2008-05-08 | 289-841 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Newmarket | — |
| 2008-05-08 | 289-842 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Richmond Hill | — |
| 2008-05-08 | 289-843 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Thornhill | — |
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.