mailgw1.pbc.ps has no NS records.
NS records for this zone are defined at pbc.ps.
NS records for this zone are defined at pbc.ps.
Question and response
Question
dig mailgw1.pbc.ps. NS
Answer
The response has no answer records.
Authority
pbc.ps. 1800 SOA karsyn.ns.cloudflare.com. dns.cloudflare.com. 2395934711 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0