ns-tmtr.verizonwireless.com has no CNAME records.
Question and response
Question
dig ns-tmtr.verizonwireless.com. NS
Answer
The response has no answer records.
Authority
verizonwireless.com. 900 SOA ns-twbg.verizonwireless.com. dnsadmin.verizonwireless.com. 25723 1800 600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0