When building lots of images you end up with a list of untagged builds at the end.
Beyarz 福 ~/Desktop/Work/Web ➤ n1bqd8a|content✓
3287 ± : docker images [0m]
REPOSITORY TAG IMAGE ID CREATED SIZE
web latest 0a27aff6030f 2 days ago 401MB
<none> <none> bd215f291219 2 days ago 401MB
<none> <none> faa2d8135eeb 2 days ago 102MB
<none> <none> 06bcd360bcd0 2 days ago 102MB
<none> <none> 4ee9b19c451b 2 days ago 102MB