List of world countries, states and their counties / districts / regions

Question

Please suggest sites for downloading list of world countries, states and their counties / districts / regions.

No need for cities.

Answer 1

go to : www.maxmind.com it's free and 99.5% accurate.

EDIT:

IP: 34.133.14.7
country: US - United States
state/region: TX - Texas
city: Houston
zip: 77072
lat/lon: 29.6997 / -95.5858

Answer 2

You can use Yahoo Geo technologies or Wiki location API.

You can also have a look at programmableweb for other Mapping APIs