Using an API to get the Location based on ZIP Code

For India, You can use below API

http://postalpincode.in/api/pincode/<your_pin_code>

Response :

{
  "Message": "Number of Post office(s) found: 2",
  "Status": "Success",
  "PostOffice": [
    {
      "Name": "ISRO Anthariksha Bhavan",
      "Description": "",
      "BranchType": "Sub Post Office",
      "DeliveryStatus": "Non-Delivery",
      "Taluk": "Bangalore North",
      "Circle": "Bangalore North",
      "District": "Bangalore",
      "Division": "Bangalore East",
      "Region": "Bangalore HQ",
      "State": "Karnataka",
      "Country": "India"
    },
    {
      "Name": "R.M.V. Extension II Stage",
      "Description": "",
      "BranchType": "Sub Post Office",
      "DeliveryStatus": "Delivery",
      "Taluk": "Bangalore North",
      "Circle": "Bangalore North",
      "District": "Bangalore",
      "Division": "Bangalore East",
      "Region": "Bangalore HQ",
      "State": "Karnataka",
      "Country": "India"
    }
  ]
}

for international postal pincode locations use this

https://api.worldpostallocations.com/pincode?postalcode=<your_pin_code_eg: 560094>&countrycode=<two_digit_country_code_eg:IN>

Response

{
  "status": true,
  "result": [
    {
      "id": "305160",
      "country": "IN",
      "postalCode": "560094",
      "postalLocation": "ISRO Anthariksha Bhavan",
      "state": "Karnataka",
      "stateId": "19",
      "district": "Bengaluru",
      "districtId": "583",
      "province": "Bangalore North",
      "provinceId": "",
      "latitude": "13.1077",
      "longitude": "77.581"
    },
    {
      "id": "305159",
      "country": "IN",
      "postalCode": "560094",
      "postalLocation": "R.M.V. Extension II Stage",
      "state": "Karnataka",
      "stateId": "19",
      "district": "Bengaluru",
      "districtId": "583",
      "province": "Bangalore North",
      "provinceId": "",
      "latitude": "13.1077",
      "longitude": "77.581"
    }
  ]
}

You can use Google Geocoding API, simple HTTP request with JSON response.

Example: http://maps.googleapis.com/maps/api/geocode/json?address=94085&region=us

{
    long_name: "California",
    short_name: "CA",
    types: [
        "administrative_area_level_1",
        "political"
    ]
}

But note that the free tier will support only:

• 2,500 requests per 24 hour period.
• 5 requests per second.