i2t
The i2t dataset is a simple, comma-separated file containing IP address ranges and corresponding time zones. This data is intended to be used to provide best-guess timezone approximation (e.g. for websites) based on a user's IP address. The i2t data itself is based on factual data from a combination of other sources.
License
This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.