shell:$ nslookup -timeout=2 -retry=1 'switch.gateway.mastercard.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
switch.gateway.mastercard.com	canonical name = ap.gateway.mastercard.com.
Name:	ap.gateway.mastercard.com
Address: 103.55.149.32