Site does not resolve

[tehmoth]

perlbal.org does not resolve:

$ host perlbal.org
Host perlbal.org not found: 3(NXDOMAIN)
$ dig perlbal.org

; <<>> DiG 9.4.2-P2 <<>> perlbal.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 34774
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;perlbal.org. IN A