Valid Denver, CO zip, 80201 returns querynotfound

Hi,

When trying to get data for zip 80201 (Denver, CO) using the query .../q/80201.json (Full URL below), I am receiving a querynotfound error. Shouldn't a Denver zip code return data?

The full Query URL is:

api.wunderground.com/api/api_key_here/geolookup/conditions/forecast/astronomy/almanac/q/80201.json

The return is:

{
"response": {
"version":"0.1",
"termsofService":"http://www.wunderground.com/weather/a...",
"features": {
"geolookup": 1
,
"conditions": 1
,
"forecast": 1
,
"astronomy": 1
,
"almanac": 1
}
,
"error": {
"type": "querynotfound"
,"description": "No cities match your search query"
}
}
}