InetAddress无法解析某些域，引发java.net.UnknownHostException，但是域实际上可以在浏览器中工作

Question

InetAddress fails to resolve the following domains:

kymcolux.com
shencan.net
zoocore.com

Tested on my home computer and a VPS with:

InetAddress addr1 = InetAddress.getByName("kymcolux.com");

https://httpstatus.io/ also can't fetch the URLs.

InetAddress throws:

java.net.UnknownHostException: zoocore.com: unknown error
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1255)
    at java.net.InetAddress.getAllByName(InetAddress.java:1171)
    at java.net.InetAddress.getAllByName(InetAddress.java:1105)
    at java.net.InetAddress.getByName(InetAddress.java:1055)
    at Main.main(Main.java:16)

Strangely they work in my browser.

UPDATE Tried different DNS servers (Google & OpenDNS). Still the same result.

Any ideas? Thanks!

Answer 1

如下所示，将www附加到网址后，看看它是否有效：

InetAddress addr1 = InetAddress.getByName("www.kymcolux.com");

Answer 2

The following sites are not even reachable from my browser without adding the www. initially. You might be able to open them in your browser if you previously visited these sites.

Note the following output:

java.net.InetAddress.getByName("google.com");//google.com/216.58.208.238            
java.net.InetAddress.getByName("www.google.com");//www.google.com/216.58.210.196