% ./dnswalk caida.org.
Checking caida.org.
Getting zone transfer of caida.org. from ns1.caida.org...failed
FAIL: Zone transfer of caida.org. from ns1.caida.org failed: Response code from server: REFUSED
Getting zone transfer of caida.org. from jungle.caida.org...done.
SOA=caida.org   contact=postmaster.caida.org
WARN: aagw-s0.caida.org A 204.212.45.14: no PTR record
WARN: adblock.caida.org CNAME brak.caida.org: unknown host
WARN: aix1.caida.org A 128.102.18.51: no PTR record
WARN: amoeba.caida.org CNAME bhava.caida.org: unknown host
WARN: arthur.caida.org A 204.212.46.6: no PTR record
WARN: bwest1.caida.org A 132.239.253.250: no PTR record
WARN: cabernet.caida.org A 192.203.230.251: no PTR record
WARN: chard.caida.org CNAME chard-e0-0.caida.org: unknown host
WARN: chardonnay.caida.org CNAME chard-e0-0.caida.org: unknown host
WARN: dubside.caida.org A 192.172.226.100: no PTR record
WARN: fester.caida.org A 192.168.251.36: no PTR record
WARN: fester-em.caida.org A 192.168.251.6: no PTR record
WARN: fester-em0.caida.org A 192.168.251.6: no PTR record
WARN: tbird.fix.caida.org A 128.102.18.27: no PTR record
WARN: termi.fix.caida.org A 128.102.18.28: no PTR record
WARN: ghostberry.caida.org A 204.216.224.42: no PTR record
WARN: gomez.caida.org A 192.168.251.35: no PTR record