Pincode Validator
Validate 6-digit Indian pincode format and identify the postal zone.
Written by Anil Gautam · Updated
What do the six digits of a pincode mean?
Each digit narrows the location. The first is the postal zone, which the tool decodes and highlights in the chart below the result: 1 covers Delhi, Haryana, Punjab, Himachal Pradesh, Jammu and Kashmir and Chandigarh, and 9 is reserved for Army Post Offices. Read together, the first two digits point to a sub-region, the first three to a sorting district, and the last three to a post office within that district.
Before any lookup, the format check strips anything that is not a digit and then needs exactly six digits that do not start with 0. The box takes only six characters, and a code typed with a space, such as 110 001, is cut to 110 00 and reported as five digits, so type the digits without spaces.
What does the post office lookup show?
Once the format is valid, the six digits are sent to the OneClickUse server, which looks them up in India Post's records and returns every post office registered under that code. The result names the district and state, counts the offices and groups them by district and postal division, along with their region and circle. Each office shows its type, such as Head Post Office or Sub Post Office, its block, and a Delivery or Non-Delivery tag. Delivery offices deliver mail to addresses, while Non-Delivery offices provide counter services only.
Try 110001. The first digit puts it in zone 1, and the lookup lists more than 20 post offices, including Parliament House, Connaught Place and Supreme Court. They fall under two districts, Central Delhi and New Delhi, so the list comes in two groups. Nearly all are tagged Non-Delivery; the New Delhi head post office carries the Delivery tag.
Why does a valid pincode show no post offices?
The format check and the lookup are separate tests. 999999 passes the format check and lands in zone 9, but India Post returns no offices for it, so the tool reports a valid format with no matching records. Codes that were never assigned, or have since been retired, behave this way. If the lookup itself fails, for example on a network error, the zone from the first digit is still shown.
For test data, the Random Address Generator builds Indian addresses with real city pincodes, such as 400001 for Mumbai and 560001 for Bengaluru, and both resolve to post offices here.