IPv6 records and SRV records were supported from the start, Bernstein himself explaining that the generic binary record format covered that. The syntax wasn't

IPv6 records and SRV records were supported from the start, Bernstein himself explaining that the generic binary record format covered that. The syntax wasn't pretty, but the support was there. Extensions to the database source form that are prettier have been around for many years. I have a DNS database with this record in it, for example: +jdebp.info:2001_41d0_2_aa92_0_ff_fe23_8e7a An SRV record would be S_sip._udp.jdebp.info::sip.jdebp.info:5060:10:20 Queries over an IPv6 transport have been supported since at least the year 2000, that work having been done by Felix von Leitner. Peter Conrad built DNSSEC support on top of M. von Leitner's work.