ams.gw has no CNAME records.
Question and response
Question
dig ams.gw. NS
Answer
The response has no answer records.
Authority
gw. 300 SOA gw01.dns.pt. info.nic.gw. 2026030201 21600 7200 2592000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0