Fastest way to redirect users based on Geolocation

Hello everybody,

We are trying to find the fastest way to redirect visitors of our domain to another (external) URL based on their geolocation. Does anyone maybe know a fast service which can do that?

Thank you,
marc

do you mean localisation by ip address ?
To be fast you can query a binary Database to retrieve IP country code. Have a look to Maxmind or our solution Toutes les applications et les API pour localiser une IP.
The both returns country code in less than 10 ms (our in less than 1ms dichotomy db) and works with ipv4 / ipv6.