~$ nmcli -f IP4.ADDRESS,IP4.DOMAIN dev show
IP4.ADDRESS[1]: 10.0.0.156/24
IP4.DOMAIN[1]: hsd1.ma.comcast.net
IP4.ADDRESS[1]: 127.0.0.1/8
~$ cat /run/resolvconf/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
So this has occurred again:
=====
~$ nmcli -f IP4.ADDRESS, IP4.DOMAIN dev show
IP4.ADDRESS[1]: 10.0.0.156/24
IP4.DOMAIN[1]: hsd1.ma.comcast.net
IP4.ADDRESS[1]: 127.0.0.1/8
~$ cat /run/resolvconf /resolv. conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.53
search hsd1.ma.comcast.net utopia.net mit.edu
=====
Note the extra entries in the 'search' line of resolv.conf—these were from networks I was recently connected to.