Yeah just need to confirm whatever DNS servers your system is using resolves it to that IP.
nslookup forum.birdcats.com
C:\Users\>nslookup forum.birdcats.com
Server: dc-usqho1ad01.world.XXXX.net
Address: 10.24.36.11
Non-authoritative answer:
Name: forum.birdcats.com
Address: 155.138.209.48
C:\Users\>nslookup
www.birdcats.com
Server: dc-usqho1ad01.world.XXXX.net
Address: 10.24.36.11
Non-authoritative answer:
Name:
www.birdcats.com
Address: 155.138.209.48
nslookup
www.birdcats.com
C:\Users\>nslookup
www.birdcats.com
Server: dc-usqho1ad01.world.XXXX.net
Address: 10.24.36.11
Non-authoritative answer:
Name:
www.birdcats.com
Address: 155.138.209.48
nslookup forum.birdcats.org
C:\Users\>nslookup forum.birdcats.org
Server: dc-usqho1ad01.world.XXXX.net
Address: 10.24.36.11
Non-authoritative answer:
Name: forum.birdcats.org
Address: 208.138.209.48
ping 155.138.209.48
Pinging 155.138.209.48 with 32 bytes of data:
Reply from 155.138.209.48: bytes=32 time=30ms TTL=56
Reply from 155.138.209.48: bytes=32 time=30ms TTL=56
Reply from 155.138.209.48: bytes=32 time=30ms TTL=56
Reply from 155.138.209.48: bytes=32 time=30ms TTL=56
Ping statistics for 155.138.209.48:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 30ms, Maximum = 30ms, Average = 30ms