/usr/bin/drill
/usr/bin/ldns-chaos
/usr/bin/ldns-compare-zones
/usr/bin/ldns-dane
/usr/bin/ldnsd
/usr/bin/ldns-dpa
/usr/bin/ldns-gen-zone
/usr/bin/ldns-key2ds
/usr/bin/ldns-keyfetcher
/usr/bin/ldns-keygen
/usr/bin/ldns-mx
/usr/bin/ldns-notify
/usr/bin/ldns-nsec3-hash
/usr/bin/ldns-read-zone
/usr/bin/ldns-resolver
/usr/bin/ldns-revoke
/usr/bin/ldns-rrsig
/usr/bin/ldns-signzone
/usr/bin/ldns-test-edns
/usr/bin/ldns-testns
/usr/bin/ldns-update
/usr/bin/ldns-verify-zone
/usr/bin/ldns-version
/usr/bin/ldns-walk
/usr/bin/ldns-zcat
/usr/bin/ldns-zsplit
You may install this package on CentOS with
yum
install ldns