IP address questions

Noticed something strange today on our network.  If I ping and IP address of 192.168.200.50, I get a destination unreachable message.  If I ping address 192.168.200.050, it pings without a problem.  See Screen Shot below:

Pinging 192.168.200.50 with 32 bytes of data:
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.
Reply from 192.168.200.40: Destination host unreachable.

Ping statistics for 192.168.200.50:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

C:\>ping 192.168.200.050

Pinging 192.168.200.40 with 32 bytes of data:
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128
Reply from 192.168.200.40: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.200.40:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

Another thing that is odd is that any IP address with the number 8 or 9 in the address gives a message to please check name and try again.  I have tried all combinations of numbers like 8, 18, 9, 19, 88, 99, etc...
See some examples below:

C:\>ping 192.168.200.080
Ping request could not find host 192.168.200.080. Please check the name and try
again.

C:\>ping 192.168.200.018
Ping request could not find host 192.168.200.018. Please check the name and try
again.

C:\>ping 192.168.200.019
Ping request could not find host 192.168.200.019. Please check the name and try
again.