Zone asnlookup-dev.zonemaster.net is (on purpose) delegated to one name server with one IP address of each protocol. Running Connectivity04 gives
# zonemaster-cli --show-module --show-testcase --test connectivity04 asnlookup-dev.zonemaster.net --raw --level INFO
0.00 INFO System Unspecified GLOBAL_VERSION version=v6.0.0
1.68 INFO Connectivity Connectivity04 CN04_IPV4_DIFFERENT_PREFIX ns_list=asnlookup-dev-ns1.zonemaster.net/13.60.60.177
1.68 INFO Connectivity Connectivity04 CN04_IPV6_DIFFERENT_PREFIX ns_list=asnlookup-dev-ns1.zonemaster.net/2a05:d016:c84:7616:68b4:e0d:5cf:b360
The other possible tag is CN04_IPV{4,6}_SAME_PREFIX which is also wrong. I guess a new tag should be created.
Zone
asnlookup-dev.zonemaster.netis (on purpose) delegated to one name server with one IP address of each protocol. Running Connectivity04 givesThe other possible tag is
CN04_IPV{4,6}_SAME_PREFIXwhich is also wrong. I guess a new tag should be created.