N3 — 13 codes dans 13 localités (Canada).
| Code postal | Localité / Quartier | Zone administrative | Coordonnées |
|---|---|---|---|
| Baden | Ontario | 43.4001, -80.6497 | |
| Elmira | Ontario | 43.6001, -80.5497 | |
| Cambridge Northeast | Cambridge · Ontario | 43.4389, -80.2649 | |
| Cambridge Northwest | Cambridge · Ontario | 43.4193, -80.3505 | |
| Cambridge West | Cambridge · Ontario | 43.4267, -80.3699 | |
| Paris | Ontario | 43.2, -80.3833 | |
| Brantford Northeast | Brant · Ontario | 43.1818, -80.2367 | |
| Brantford Central | Brant · Ontario | 43.1692, -80.2684 | |
| Brantford Southeast | Brant · Ontario | 43.1394, -80.2357 | |
| Brantford Southwest | Brant · Ontario | 43.131, -80.3254 | |
| Brantford Northwest | Brant · Ontario | 43.1734, -80.298 | |
| Caledonia | Ontario | 43.0668, -79.9329 | |
| Simcoe | Ontario | 42.8334, -80.2997 |