Statistics:
24 checks performed in 2.0558 seconds.
Found 3 listed, 21 unlisted in this collection of blackhole lists.
Please note, that dnswl.org is a whitelist not a black list.
If in doubt, if the lists are alife and the checks are working, you may check for the test IP address 127.0.0.2, which should trigger most lists as a standard test record.