Neptunus is een straat te Twello in de gemeente Voorst en is gelegen in de Nederlandse provincie Gelderland.
| Postcode | Huisnummers |
|---|---|
| 7391 RN | 60, 62, 64, 66, 68, 70, 72, 58, 56, 52, 48, 46, 44, 42, 40, 38, 36, 34, 32, 30, 26, 24, 20, 18, 16, 14, 12, 10, 8, 6, 4; |
| 7391 RP | 5, 7, 9, 11, 13, 15, 19, 21, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 59; |