Hi there,

Maxmind is pretty much the best service for this.

Although anything below country level should always be taken with a grain of salt. It really depends on how accurate you need it to be.

Best,

Hristian

What about Google Analytics? can I use it for the task?

You can’t or rather you shouldn’t be passing personally identifiable information to Google Analytics.

If Google finds out you are doing it, they’ll suspend your GA and possibly Adwords account.

In GA you can see geolocation but it won’t be tied to a particular lead.

Best,

Hristian