IP99

IP geolocation with proxy, VPN and datacenter risk and the age of the evidence

Official docs outline

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IP Vigilante Free IP Geolocation API
ip-api Find location with IP address or domain
IP-API.io IP geolocation with VPN/proxy/Tor detection, reputation and risk score
ip2geo.dev Programmatically convert IP addresses into geolocation data
IP2Location IP geolocation web service to get more than 55 parameters
IP2Proxy Detect proxy and VPN using IP address
ipapi.co Find IP address location information
ipapi.com Real-time Geolocation & Reverse IP Lookup REST API
IPGEO Unlimited free IP Address API with useful information
ipgeolocation IP Geolocation AP with free plan 30k requests per month
ipgeolocationapi IP geolocation with ASN, timezone, currency and threat data, 5,000 keyless calls a day
IPInfoDB Free Geolocation tools and APIs for country, region, city and time zone lookup by IP address