said by mmainprize:
The 10.x.x.x address are private address ...
So there are not routeable, that means they can not be passed through NAT or routers or over the internet.
Just to nitpick a little that is not precisely correct.
RFC-1918 private IP addresses are guaranteed not to be assigned to an Internet host and can be used and reused multiple times. There is nothing that prevents them from being routed from one network to another.
NAT will cheerfully translate one set of private addresses used on the LAN to another on the WAN.
1) It is not uncommon for ISPs to use private IP addresses for some of their internal routers. In that case since residential customers typically have a bridged rather then routed connection the customer is on the ISPs LAN. This is a controversial practice and discouraged but not prohibited.
2) There are also some ISPs that give customers private IP addresses rather then public. This is not all that common in the US but occurs internationally due to the IPv4 address shortage.
3) You can prove this to yourself by putting another NAT router on your LAN. Devices behind this router will work just fine.
What should happen is ISP routing should refused to route these addresses, or APIPA for that matter if they are not used internally by the ISP and occur off network (i.e. originate from the Internet).
And now back to our regularity scheduled program