vps19.rentvps.com has no NS records.
NS records for this zone are defined at rentvps.com.
NS records for this zone are defined at rentvps.com.
Question and response
Question
dig vps19.rentvps.com. NS
Answer
The response has no answer records.
Authority
rentvps.com. 14400 SOA ns1.rentvps.com. hostmaster.rentvps.com. 2020042769 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0