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PIN code 689666 is the Postal Index Number assigned to the Malayalapuzha Thazham SO post office in PATHANAMTHITTA 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 (689) pinpoint the postal district or sorting hub; and the last three digits (666) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to Malayalapuzha Thazham SO in PATHANAMTHITTA, Kerala, always include PIN – 689666 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 689666 |
| Zone | Zone 6 · Southern India |
| Sort District | 689 |
| Delivery Code | 666 |
| Postal Circle | Kerala Circle |
| State / UT | Kerala |
Browse PIN codes for other post offices in PATHANAMTHITTA, Kerala