ip-148-170-66-162.isp.net has no MX records.
Question and response
Question
dig ip-148-170-66-162.isp.net. MX
Answer
The response has no answer records.
Authority
isp.net. 3600 SOA gate.lasvegas.net. postmaster.lasvegas.net. 2025121619 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0