Geotargeting Ads: How the Internet Knows Where You Live

Introduction: The Local Billboard

When you browse a news site, you'll often see an ad that says "Warning for drivers in [Your City]!". This isn't GPS; it is IP Geotargeting. Ad networks subscribe to massive databases (like MaxMind) that constantly map IP blocks to physical zip codes.

The Accuracy Problem

These databases are not perfect. If your ISP buys a new block of IPs that used to belong to a company in Texas, you might suddenly start seeing ads for Dallas restaurants even if you live in Seattle. The database 'thinks' your IP is still in Texas until it slowly updates its records weeks later.

Conclusion

Geotargeting is the backbone of local digital commerce, relying entirely on the assumption that an IP address correlates with a zip code. See where the internet thinks you are here.