InetAddress can't resolve some domains, throws java.net.UnknownHostException, but domains actually work in the browser

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!

Your Browser auto adds `www` or `http`. – Murat Karagöz Jul 18 '16 at 13:43 — Murat Karagöz, Jul 18 '16 at 13:43

score 4 · Accepted Answer · answered Jul 18 '16 at 13:40

4

See if it works when you append www to the urls as shown below:

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

answered Jul 18 '16 at 13:40

omfg... I don't want to live on this planet anymore. – ss1 Jul 18 '16 at 13:43

score 0 · Answer 2 · answered Jul 18 '16 at 13:49

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

InetAddress can't resolve some domains, throws java.net.UnknownHostException, but domains actually work in the browser

2 Answers2