Google Maps API Geocode not returning results on passing postal code as a value to address param - google-maps

Question

On trying to search a particular address by postal code(2000) it does not return the expected formatted address correctly, but whereas on searching using the address(frederiksberg) instead of postal code it returns the expected formatted address correctly.
https://maps.googleapis.com/maps/api/geocode/json?address=2000&components=country:Denmark&key=apikey
https://maps.googleapis.com/maps/api/geocode/json?address=frederiksberg&components=country:Denmark&key=apikey
But for a similar search with address set to postal code(4000) it returns the expected formatted address correctly, url below.
https://maps.googleapis.com/maps/api/geocode/json?address=4000&components=country:Denmark&key=apikey
Please let us know why its not returning the expected formatted address for address set to 2000.
TIA!

Answer 1

We experienced a similar issue with Postcode 2000 in Australia (which is Sydney), returned OK but with Zero_Result returned. All the other postcodes worked fine except 2000
Our initial search was
geocode({
address: "2000 Australia",
region: "AU" })
We solving it by adding "Postcode" before the search
geocode({
address: "Postcode 2000 Australia",
region: "AU" })

Answer 2

The Zip code 2000 matches more than one address. You can get the most common ones this way:
https://geocode.xyz/2000?region=DK
output:
Denmark x,y z: 55.68132,12.52966
🇩🇰
3 Solbjerg Plads, Frederiksberg C, Denmark » Confidence Score: 0.5
Frederiksberg DK 2000 Denmark
Frederiksberg Kommune DK 2000 Denmark
Brønshøj DK 2000 Denmark
Bronshoj DK 2000 Denmark
Frederiksberg C DK 2000 Denmark
Or in json format:
https://geocode.xyz/2000?region=DK&json=1
Json Output:
{
"standard": {
"addresst": "3 Solbjerg Plads",
"stnumber": "3",
"prov": "DK",
"city": "Frederiksberg C",
"countryname": "Denmark",
"postal": "2000",
"confidence": "0.5"
},
"longt": "12.52966",
"alt": {
"loc": [
{
"longt": "12.51635",
"city": "Frederiksberg",
"cc": "6353",
"latt": "55.68239"
},
{
"longt": "12.51704",
"city": "Frederiksberg Kommune",
"cc": "5629",
"latt": "55.68255"
},
{
"longt": "12.50332",
"city": "Bronshoj",
"cc": "2",
"latt": "55.67113"
},
{
"longt": "12.50332",
"city": "Bronshoj",
"cc": "2",
"latt": "55.67113"
},
{
"longt": "12.52966",
"city": "Frederiksberg C",
"cc": "1",
"latt": "55.68132"
}
]
},
"latt": "55.68132"
}