Helfrichstraat is een straat te Apeldoorn in de gemeente Apeldoorn en is gelegen in de Nederlandse provincie Gelderland.
| Postcode | Huisnummers |
|---|---|
| 7311 JB | 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25A, 25B, 25C, 41, 42, 43, 44, 45, 46, 47A, 47B, 47C, 47D, 47E, 47F, 47G, 47H, 47J, 47, 48, 49, 55, 59, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 25L, 25K, 25J, 25H, 25G, 25F, 25E, 25D; |