| Place | Post Code |
|---|---|
| Makala, Biriwa | None |
| Makoini, Biriwa | None |
| Makolo, Biriwa | None |
| Makombon, Biriwa | None |
| Makorogbo, Biriwa | None |
| Maleni, Biriwa | None |
| Malimba, Biriwa | None |
| Manami, Biriwa | None |
| Manke, Biriwa | None |
| Mankorokoro, Biriwa | None |
| Manlokoko, Biriwa | None |
| Manyoro, Biriwa | None |
| Mapore, Biriwa | None |
| Mareke, Biriwa | None |
| Masama, Biriwa | None |
| Masandi, Biriwa | None |
| Masankori, Biriwa | None |
| Masasa, Biriwa | None |
| Maseka, Biriwa | None |
| Masipo, Biriwa | None |
| Matedi, Biriwa | None |
| Mateli, Biriwa | None |
| Matempe, Biriwa | None |
| Matimeli, Biriwa | None |
| Matunko, Biriwa | None |
| Mawore, Biriwa | None |