| Morning Alarm & Reminder Service |
173 |
| Time Announcement in English |
174 |
| Time Announcement in Tamil |
175 |
| Time Announcement in Hindi |
177 |
| Trunk Booking |
180 |
| Assistance / Cancellation |
181 |
| Trunk Information |
183 |
| Phonogram Service |
185 |
| International Calls |
186 |
| International Enquiries/Asst. |
187 |
| Trunk Delay Enquiry |
188 |
| Lightning Call Booking |
189 |
| Trunk Assistance |
191 |
| Directory Enquiry |
197 |
| Repair Service |
198 |
| Local Assistance |
199 |
| Change of Telephone No in Tamil |
1953 |
| Change of Telephone No in English |
1952 |