ns4.ericsontpa.com has no NS records.
NS records for this zone are defined at ericsontpa.com.
NS records for this zone are defined at ericsontpa.com.
Question and response
Question
dig ns4.ericsontpa.com. NS
Answer
The response has no answer records.
Authority
ericsontpa.com. 300 SOA Erson-app-Srv2. hostmaster. 75 900 600 86400 300
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0