Castlerock is located in the district of Uttara Kannada, Karnataka. The pincode of Castlerock is 581121. The area "Castlerock" lies under takula of Supa and has a Sub Office. Castlerock comes under the head office Sirsi. The postal division for pin code 581121 is Sirsi.
| Area | Castlerock |
| Pincode | 581121 |
| Taluka or Tehsil | Supa |
| District | Uttara Kannada |
| State | Karnataka |
| Office Status | Sub Office |
| Postal Division | Sirsi |
| Postal Region | North Karnataka |
| Sub Office | NA |
| Head Office | Sirsi |
| Contact Address | Postmaster, Post Office Castlerock (Sub Office), Supa, Karnataka, India, Pin Code: 581121 |
| Telephone | 08383-251521 |
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 581121 | Bazarkunang pin code | Uttara Kannada | Supa | Branch Office |
| 581121 | Castlerock pin code | Uttara Kannada | Supa | Sub Office |
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