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192.0.0.0/29

192.0.0.0/29 is the IPv4 Service Continuity Prefix used inside DS-Lite and similar IPv4-over-IPv6 setups.

Last updated 2 Nov 2026 from the IANA IPv4 Special-Purpose Address Registry

Short answer

192.0.0.0/29 is the IPv4 Service Continuity Prefix used inside DS-Lite and similar IPv4-over-IPv6 setups.

Block192.0.0.0/29
First – last192.0.0.0 – 192.0.0.7
Size8 addresses
Name in the registryIPv4 Service Continuity Prefix
Defined inRFC 7335
Allocated2011-06
Valid as source / destinationTrue / True
ForwardableTrue
Globally reachableFalse

What it means

RFC 7335 reserves 192.0.0.0/29 for the tunnel endpoints of DS-Lite, a way providers carry customers’ IPv4 over an IPv6-only network to a shared NAT. Your router may show an address like 192.0.0.2 on its WAN side.

If you see it, your provider is sharing public IPv4 addresses between customers, much like CGNAT.

Want the address websites actually see for you? Open the Truth Check.

Sources

  1. IANA IPv4 Special-Purpose Address Registry (CC0) · checked 2 Nov 2026
  2. RFC 7335