Sina's IP address query interface: Sina: http://counter.sina.com.cn/ip? Ip = IP address returned Js data, I feel not very accurate, can be removed after the question mark, directly return the local IP address corresponding to the location of a proper ip address query interface: Return XML data: http://www.yodao.com/smartresult-xml/search.s? Type = ip & q = 0.0.0.0 the returned JSON data: http://www.yodao.com/smartresult-xml/search.s? JsFlag = true & type = ip & q = 0.0.0.0 change 0.0.0.0 to the IP address to be queried, this should be the pure database Pacific computer network ip address query interface: http://whois.pconline.com.cn /? Ip = 0.0.0.0 replace 0.0.0.0 with an ip address. There are other irrelevant content on the page, which tells us which interfaces can be called, interface call parameters, usage methods, and other interfaces for querying mobile phone numbers: return XML data: http://www.youdao.com/smartresult-xml/search.s? Type = mobile & q = 13888880000 return JSON data: http://www.youdao.com/smartresult-xml/search.s? JsFlag = true & type = mobile & q = 13888880000 ID card query interface: returned XML data: http://www.youdao.com/smartresult-xml/search.s? Type = id & q = id card number returned JSON data: http://www.youdao.com/smartresult-xml/search.s? JsFlag = true & type = id & q = id card number