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[ewx]

$ dig +short aaaa www.v6.facebook.com
2620:0:1cfe:face:b00c::3

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[dave holland (from livejournal.com)]

$ dig +short aaaa liszt.debian.org
2001:41b8:202:deb:213:21ff:fe20:1426

(might be coincidence, that's the only Debian host I've noticed with "deb" in the record)