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PIN code 110020 is the Postal Index Number assigned to the C R R I SO South Delhi post office in SOUTH DELHI district, Delhi. It is administered under the Delhi Circle Postal Circle. The code falls under Zone 1 of India's postal network, covering the Northern 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 (1) identifies the broad postal zone; the first three digits (110) pinpoint the postal district or sorting hub; and the last three digits (020) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to C R R I SO South Delhi in SOUTH DELHI, Delhi, always include PIN – 110020 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 110020 |
| Zone | Zone 1 · Northern India |
| Sort District | 110 |
| Delivery Code | 020 |
| Postal Circle | Delhi Circle |
| State / UT | Delhi |
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