Find the WAN address range

IT-Arkitekt asked:

I’m trying to find the WAN IP range for a network on another location.
When I do a tracert on the LAN gw, the last hop is the adress is, This is the ip range belonging to the ISP, but I didn’t think a Wan adress would end With 255?

I know tracert will not allways find show the WAN IP. I’m not on this network, so I can not take a html request. Is there somthing else I can do to check?

Owner Full IP Range: –

My answer:

Yes, an IP address of an Internet host can end in .255, though it’s rather uncommon. It would require the subnet to be at least /23.

See How does IPv4 Subnetting Work? for the full explanation.

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