The IP API
FreemiumDegradedNot yet verified
IP geolocation, ASN/WHOIS lookup and VPN/datacenter/bogon detection for IPv4 and IPv6.
Example request
curl -s 'https://api.theipapi.com/v1/ip/8.8.8.8?api_key=$API_KEY'
Free tier, in plain English
Free plan gives 1,000 lookups a day with no credit card; paid plans start at $19/month for 600,000/month.
Alternatives in IP Geolocation
AbstractAPI IP GeolocationLooks up a visitor's country, region, city, and timezone from their IP address.FreemiumApiipIP geolocation lookup returning country, city, currency, timezone, and ISP data for an IP address.FreemiumBigDataCloud's IP Geolocation APILocates an IP address to city/region level using router-topology mapping rather than WHOIS data.FreemiumBigDataCloud's Network Engineering APIASN details, BGP prefix data, IP-to-network lookups and Tor exit-node detection for network engineering.FreemiumCountry.isLooks up a visitor's country (and optionally city/ASN) from their IP address.Free