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What the title says.

I want to know whether I can assume all internal IP addresses supplied by a regular home router will be IPv4 or might they be IPv6 as well?

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  • There are many different models of home routers. Some do support dual stack IPv4 and IPv6 including (but probably not limited to) any home router running openwrt or ddwrt. – Mark Jan 11 at 20:49
  • @Mark Just to verify - you mean internal IPv6 addresses? – ispiro Jan 11 at 20:51
  • This is very broad--there are so many different models of routers out there. "regular home router" is not specific, could be anything from the free box your ISP gives you to a Turris Omnia or some of the Unifi prosumer home router kit (both of which support ipv6 out of the box and can provide ipv6 addresses to clients). – Mark Jan 11 at 20:53
  • yes, my clients on my network get an IPv6 from the router if they ask for one (running openwrt on a "home router") openwrt.org/docs/guide-user/network/ipv6/start – Mark Jan 11 at 20:55
  • @Mark I wasn't really asking about prosumer, more about the basic types non-techies would have in their homes, however, from the tone of your comments I see that I shouldn't assume it'll always be IPv4, just like the answer below. Thanks. – ispiro Jan 11 at 20:56
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It may depend upon the router, but a number of routers I have had allow a choice of IPv4 or IPv6 internally and externally.

I suggest you access the GUI setup of your router and check the WAN and LAN detail settings.

You cannot make an assumption - you must check your own situation.

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  • Thanks. (+1) Can't accept yet (SuperUser system, not me). – ispiro Jan 11 at 20:58
  • You should be able to accept. I am not entirely certain but I think you can. – John Jan 11 at 21:01
  • There's a minimum waiting time to accept. When I wrote the comment above I tried accepting and was notified I have to wait another 4 minutes. Anyway, now I can, and have. Thanks again. – ispiro Jan 11 at 21:04

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