Question: Can you recommend a scalable solution for geolocating IP addresses in real-time?

If you need a service to geolocate IP addresses at scale in real time, MaxMind is a well-established option. It offers IP geolocation with real-time risk scoring and other fraud-prevention data. The service covers 99.9999% of IP addresses and has 99.99% uptime for its web service, so it's a good choice for businesses of any size.

Another good option is Ipregistry. The service offers accurate and reliable IP address data, detailed geolocation and threat intelligence. It can handle up to a million requests per day, which makes it a good choice for publishers, ad networks, e-tailers and e-commerce sites that need to personalize content and block fraud.

ipdata offers a robust IP Geolocation API that includes geolocation data, threat intelligence feeds and proxy/VPN detection. It's available in several pricing tiers and is GDPR compliant, with high availability and uptime. It's geared for developers who need to localize content, block fraud and enforce geographic restrictions.

For a scalable and secure option, check out ipapi. It offers fast and accurate IP lookup, secure HTTPS encryption and reliable high availability built on AWS. The API is available in several formats and is good for a variety of use cases, including customizing website content and blocking bad bots.