how assigned a inet6 address to my machine

Hi there !
Question about IPV6 networking.
Code:*miguel*~*ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 90:2b:34:38:d2:cf brd ff:ff:ff:ff:ff:ff
inet 192.168.1.33/24 brd 192.168.1.255 scope global dynamic noprefixroute enp3s0
valid_lft 42403sec preferred_lft 42403sec
inet6 fe80::6424:37f8:c78e:d276/64 scope link noprefixroute
valid_lft forever preferred_lft forever
*miguel*~*ip route
default via 192.168.1.1 dev enp3s0 proto dhcp metric 100
192.168.1.0/24 dev enp3s0 proto kernel scope link src 192.168.1.33 metric 100
*miguel*~**Looks like my cabled interface enp3s0 has a ipv6 address. It is configured to receive ip address from DHCP.
The only DHCP server in my home is the internet router 192.168.1.1
But looks like the my computer don't have a ipv6 route to it.
So I was wondering how my interface was configured with that ipv6 address since my router isn't ipv6 capable....