IP2Location.io

说明（暂未翻译，以下为英文原文）

Freemium, fast, and reliable IP geolocation API. Get data like city, coordinates, ISP, ASN, AS data and more. The free plan includes 50k credits per month. IP2Location.io also offers 500 free WHOIS and hosted domain lookups per month. See domain registration details and find domains hosted on a specific IP. Upgrade to a paid plan for more features.