Pincode 621803 is a 6-digit postal code serving 12 post offices in Ariyalur district, Tamil Nadu. Kallathur Thandalai SO is the Post Office for this area, located at 11.0000°N, 78.3200°E. The first digit ‘6’ identifies the Tamil Nadu postal region; the full code pinpoints the Ariyalur delivery zone.
| Post Office | Type |
|---|---|
| Kallathur Thandalai SO | Post Office |
| Anikduichan BO | Branch Post Office |
| Eravangudi BO | Branch Post Office |
| Kalleri BO | Branch Post Office |
| Kattathur BO | Branch Post Office |
| Koovathur BO | Branch Post Office |
| Kulathur BO | Branch Post Office |
| Kumiliankuli BO | Branch Post Office |
| Vadugarpalayam BO | Branch Post Office |
| Vettiarvettu BO | Branch Post Office |
| Vizhapallam BO | Branch Post Office |
| ZMelur BO | Branch Post Office |
Data sourced from India Post, Department of Posts, Government of India. Data last verified: May 2026.
Ariyalur, Tamil Nadu. Map data: OpenStreetMap, CARTO.