Problems with IP addresses

[winky8300]

Hello

in recent days, the IP addresses of certain new registered are not displayed, I do not know why, though I've not installed the new add-ons.
Thank you for your help

[Dave]

Could it be because their IP address is a IPv6 address?

[winky8300]

Could it be because their IP address is a IPv6 address?

thank you for your reply dave
I do not know, in fact I do not know what same means "IPv6 address"
thanks again

[RichieBoy67]

Here you go:
https://en.wikipedia.org/wiki/IPv6_address

[winky8300]

ah ok, il is clear know
thank you very match