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PIN code 685566 is the Postal Index Number assigned to the C Kuthumkal BO post office in IDUKKI district, Kerala. It is administered under the Kerala Circle Postal Circle. The code falls under Zone 6 of India's postal network, covering the Southern India region.
India's PIN code system — standing for Postal Index Number — was introduced on 15 August 1972 to streamline postal sorting and delivery across the country. Each 6-digit code is structured systematically: the first digit (6) identifies the broad postal zone; the first three digits (685) pinpoint the postal district or sorting hub; and the last three digits (566) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to C Kuthumkal BO in IDUKKI, Kerala, always include PIN – 685566 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 685566 |
| Zone | Zone 6 · Southern India |
| Sort District | 685 |
| Delivery Code | 566 |
| Postal Circle | Kerala Circle |
| State / UT | Kerala |
Browse PIN codes for other post offices in IDUKKI, Kerala