Yes I can ping them from a windows 10 machine on the same network segment also connected through ethernet to the router/modem combo.
C:\Users{removed}>ping 192.168.0.1
Pinging 192.168.0.1 with 32 bytes of data:
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=2ms TTL=64
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Reply from 192.168.0.1: bytes=32 time=1ms TTL=64
Ping statistics for 192.168.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 2ms, Average = 1ms
C:\Users{removed}>ping 192.168.0.55
Pinging 192.168.0.55 with 32 bytes of data:
Reply from 192.168.0.55: bytes=32 time<1ms TTL=64
Reply from 192.168.0.55: bytes=32 time<1ms TTL=64
Reply from 192.168.0.55: bytes=32 time<1ms TTL=64
Reply from 192.168.0.55: bytes=32 time<1ms TTL=64
Ping statistics for 192.168.0.55:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms