209.237.251.32.ip.unitedlayer.com has no NS records.
NS records for this zone are defined at ip.unitedlayer.com.
NS records for this zone are defined at ip.unitedlayer.com.
Question and response
Question
dig 209.237.251.32.ip.unitedlayer.com. NS
Answer
The response has no answer records.
Authority
ip.unitedlayer.com. 10800 SOA ns1.unitedlayer.com. ed.unitedlayer.com. 2017062901 21600 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0