Why are impressions served outside my specified Geo region?

Impressions can be served outside of a specified Geo area due to VPNs or Proxy Server. For instance, if someone is traveling and logging into their company’s VPN, the impression will be served in the user’s actual location even though it looks like they are in the city associated with the VPN. Geo targeting is based on databases that map IP addresses to geographic regions. As with any comparison of reports across systems discrepancies will exist due to the technological differences. Qunatcast works extensively to constantly maintain and update our databases to ensure accurate Geo targeting for our clients.