I think the DNS servers that have perl.com are off-line or inaccessible at the moment:

# dig perl.com any
 
; <<>> DiG 9.2.3rc2 <<>> perl.com any
;; global options:  printcmd
;; connection timed out; no servers could be reached

# whois perl.com
...
   Domain servers in listed order:
 
   NS.SONGLINE.COM              208.201.239.31
   NS2.XOR.COM                  192.225.43.209
   NS1.SONIC.NET                208.201.224.11
 
# ping  208.201.239.31
PING 208.201.239.31 (208.201.239.31) 56(84) bytes of data.
 
--- 208.201.239.31 ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 6010ms

# ping 192.225.43.209
PING 192.225.43.209 (192.225.43.209) 56(84) bytes of data.
 
--- 192.225.43.209 ping statistics ---
10 packets transmitted, 0 received, 100% packet loss, time 9015ms
 
]# ping 208.201.224.11
PING 208.201.224.11 (208.201.224.11) 56(84) bytes of data.
 
--- 208.201.224.11 ping statistics ---
9 packets transmitted, 0 received, 100% packet loss, time 8010ms
[download]

/J\