Oonaiyur is located in the district of Pudukkottai, Tamil Nadu. The pincode of Oonaiyur is 622505. The area "Oonaiyur" lies under takula of Tirumayam and has a Branch Office. Oonaiyur comes under the head office Pudukkottai. The postal division for pin code 622505 is Pudukkottai.
| Area | Oonaiyur |
| Pincode | 622505 |
| Taluka or Tehsil | Tirumayam |
| District | Pudukkottai |
| State | Tamil Nadu |
| Office Status | Branch Office |
| Postal Division | Pudukkottai |
| Postal Region | Tiruchy |
| Sub Office | Ramachandrapuram (Pudukkottai) |
| Head Office | Pudukkottai |
| Contact Address | Postmaster, Post Office Oonaiyur (Branch Office), Tirumayam, Tamil Nadu, India, Pin Code: 622505 |
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 622505 | Hirudayapuram pin code | Pudukkottai | Thirumayam | Branch Office |
| 622505 | Oonaiyur pin code | Pudukkottai | Tirumayam | Branch Office |
| 622505 | Panangudi pin code | Pudukkottai | Tirumayam | Branch Office |
| 622505 | Ramachandrapuram Pudukkottai pin code | Pudukkottai | Tirumayam | Sub Office |
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