A recent whois change shows that ABC.biz has been acquired by Google, the domain was registered back in 2002. The domain was under privacy for a few months, prior to that it was owned by Eisbaer Media GmbH out of Germany.
Google has been on a buying spree since it formed the holding company known as Alphabet. ABC.mx went for $17,700, ABC.global was acquired, ABC.xyz and ABC.cm.
ABC.net which was actually registered one year prior to ABC.com is up for auction on Flippa, reserve not met, it will be interesting to see if Google comes and buys ABC.net.