Mastgat is een straat te Hansweert in de gemeente Reimerswaal en is gelegen in de Nederlandse provincie Zeeland.
| Postcode | Huisnummers |
|---|---|
| 4417 CL | 2, 4, 6, 8, 10, 12, 14, 16, 24, 26, 28, 30, 32, 34, 36; |
| 4417 CM | 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37; |