mailob1.chi.concordfax.com has no AAAA records.
Question and response
Question
dig mailob1.chi.concordfax.com. AAAA
Answer
The response has no answer records.
Authority
concordfax.com. 600 SOA a1.uberns.com. postmaster.concordfax.com. 2602230001 3600 600 691200 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0