Facebook does this too:

  $ dig +short AAAA facebook.com
  2a03:2880:f10e:83:face:b00c:0:25de

▲ sedatk 2 days ago | parent [-]

They might be the first to do this. Google could have done it easily with 6006:1e, but they never took the opportunity.

	▲	tripdout a day ago \| parent [-]
		Similar, they do have 1e100.net also.