host57.registrar-servers.com has no NS records.
NS records for this zone are defined at registrar-servers.com.
NS records for this zone are defined at registrar-servers.com.
Question and response
Question
dig host57.registrar-servers.com. NS
Answer
The response has no answer records.
Authority
registrar-servers.com. 3600 SOA edns.registrar-servers.com. support.namecheap.com. 1773437989 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0