Information about .broker

Nameservers

Nameserver	A	AAAA
ac1.nstld.com	192.42.173.30	2001:500:120::30
ac2.nstld.com	192.42.174.30	2001:500:121::30
ac3.nstld.com	192.42.175.30	2001:500:122::30
ac4.nstld.com	192.42.176.30	2001:500:123::30

More detailed DNS data can be found from here.