10.10.10.10 is a Special Purpose IP Address.

10.0.0.0/8 - Private-Use
10.0.0.0/8 was allocated on February of 1996.

Addresses in 10.0.0.0/8 may be used as the source address of an IP datagram that transits two devices.

Addresses in 10.0.0.0/8 may be used as the destination address of an IP datagram that transits two devices.

Addresses in 10.0.0.0/8 are forwardable.
A router may forward an IP datagram to Addresses in 10.0.0.0/8 between external interfaces

Addresses in 10.0.0.0/8 are NOT globally reachable
An IP datagram may NOT be forwarded to Addresses in 10.0.0.0/8 beyond a specified administative domain.

Addresses contained in 10.0.0.0/8 may be used in private networks and they cannot legitimately appear on the public Internet. Addresses within 10.0.0.0/8 can be used without any coordination with IANA or a RIR.

[ RFC1918, ^ ] , Address Allocation for Private Internets

  
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