| Place | Post Code |
|---|---|
| Malliga, Ulundurpettai | 607204 |
| Mamandur, Ulundurpettai | 607107 |
| Manamedu, Ulundurpettai | 607107 |
| Mattigai, Ulundurpettai | 607204 |
| Mayiladunthangal, Ulundurpettai | 607201 |
| Mazhayampattu, Ulundurpettai | 607203 |
| Melthaniyalampattu, Ulundurpettai | 607101 |
| Mepuliyur, Ulundurpettai | 606107 |
| Mettathur, Ulundurpettai | 607204 |
| Mettu Attur, Ulundurpettai | 606102 |
| Mettu Nannaram, Ulundurpettai | 606102 |
| Mettu Pachapalayam, Ulundurpettai | 606102 |
| Moolasamudram, Ulundurpettai | 606107 |
| N. Pilrampattu, Ulundurpettai | 607201 |
| Nachiyarpettai, Ulundurpettai | 606107 |
| Nainakuppam, Ulundurpettai | 606115 |
| Nallakuppam, Ulundurpettai | 606107 |
| Nannaram, Ulundurpettai | 606102 |
| Nannikuppam, Ulundurpettai | 607204 |
| Naripalayam, Ulundurpettai | 607201 |
| Natham, Ulundurpettai | 606107, 607204 |
| Nathamur, Ulundurpettai | 606102 |
| Nedumanur, Ulundurpettai | 606305 |
| Neivanai, Ulundurpettai | 607201 |
| New Colony, Ulundurpettai | 607201 |
| New Vannagapadi, Ulundurpettai | 607202 |