Registry included below
The IETF has reserved the address block of 192.0.0.0/24 for use for special purposes relating to protocol assignments. This registry contains the current assignments made by the IETF from this address block. Address prefixes listed in the Special Purpose Address Registry are not guaranteed routability in any particular local or global context. The IPv4 and IPv6 Special-Purpose Address Registries maintain the following information regarding each entry: o Address Block - A block of IPv4 or IPv6 addresses that has been registered for a special purpose. o Name - A descriptive name for the special-purpose address block. o RFC - The RFC through which the special-purpose address block was requested. o Allocation Date - The date upon which the special-purpose address block was allocated. o Termination Date - The date upon which the allocation is to be terminated. This field is applicable for limited-use allocations only. o Source - A boolean value indicating whether an address from the allocated special-purpose address block is valid when used as the source address of an IP datagram that transits two devices. o Destination - A boolean value indicating whether an address from the allocated special-purpose address block is valid when used as the destination address of an IP datagram that transits two devices. o Forwardable - A boolean value indicating whether a router may forward an IP datagram whose destination address is drawn from the allocated special-purpose address block between external interfaces. o Global - A boolean value indicating whether an IP datagram whose destination address is drawn from the allocated special-purpose address block is forwardable beyond a specified administrative domain. o Reserved-by-Protocol - A boolean value indicating whether the special-purpose address block is reserved by IP, itself. This value is "TRUE" if the RFC that created the special-purpose address block requires all compliant IP implementations to behave in a special way when processing packets either to or from addresses contained by the address block. If the value of "Destination" is FALSE, the values of "Forwardable" and "Global" must also be false.
|Address Block||Name||RFC||Allocation Date||Termination Date||Source||Destination||Forwardable||Global||Reserved-by-Protocol|
|0.0.0.0/8||"This host on this network"||[RFC1122], section 22.214.171.124||September 1981||N/A||True||False||False||False||True|
|100.64.0.0/10||Shared Address Space||[RFC6598]||April 2012||N/A||True||True||True||False||False|
|127.0.0.0/8||Loopback||[RFC1122], section 126.96.36.199||September 1981||N/A||False||False||False||False||True|
|169.254.0.0/16||Link Local||[RFC3927]||May 2005||N/A||True||True||False||False||True|
|192.0.0.0/24||IETF Protocol Assignments||[RFC6890], section 2.1||January 2010||N/A||False||False||False||False||False|
|192.0.0.170/32, 192.0.0.171/32||NAT64/DNS64 Discovery||[RFC7050], section 2.2||February 2013||N/A||False||False||False||False||True|
|192.0.2.0/24||Documentation (TEST-NET-1)||[RFC5737]||January 2010||N/A||False||False||False||False||False|
|188.8.131.52/24||6to4 Relay Anycast||[RFC3068]||June 2001||N/A||True||True||True||True||False|
|198.51.100.0/24||Documentation (TEST-NET-2)||[RFC5737]||January 2010||N/A||False||False||False||False||False|
|203.0.113.0/24||Documentation (TEST-NET-3)||[RFC5737]||January 2010||N/A||False||False||False||False||False|
|240.0.0.0/4||Reserved||[RFC1112], section 4||August 1989||N/A||False||False||False||False||True|
|255.255.255.255/32||Limited Broadcast||[RFC919], section 7||October 1984||N/A||False||True||False||False||False|
Not useable unless by virtue of a more specific reservation.