o3.email.accelo.com has no NS records.
NS records for this zone are defined at accelo.com.
NS records for this zone are defined at accelo.com.
Question and response
Question
dig o3.email.accelo.com. NS
Answer
The response has no answer records.
Authority
accelo.com. 900 SOA ns-1044.awsdns-02.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0