There are special purpose, not globally routed IP addresses in 198.18.0.0/24.
198.18.0.0/15 - Benchmarking 198.18.0.0/15 was allocated on March of 1999. Addresses in 198.18.0.0/15 may be used as the source address of an IP datagram that transits two devices. Addresses in 198.18.0.0/15 may be used as the destination address of an IP datagram that transits two devices. Addresses in 198.18.0.0/15 are forwardable. A router may forward an IP datagram to Addresses in 198.18.0.0/15 between external interfaces Addresses in 198.18.0.0/15 are NOT globally reachable An IP datagram may NOT be forwarded to Addresses in 198.18.0.0/15 beyond a specified administative domain. The 198.18.0.0/15 block which has been allocated for use in benchmark tests of network interconnect devices. This range was assigned to minimize the chance of conflict in a case a testing device were to be accidentally connected to part of the Internet. Packets with source addresses from this range are not meant to be forwarded across the Internet. [ RFC2544, ^ ] , Benchmarking Methodology for Network Interconnect Devices.
Please enter public globally routed Internet IP numbers.See !ptr24 and !help !ptr24 for examples.

  
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