shell:$ nslookup -timeout=2 -retry=1 'onesignal.appysaude.co.ao'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
onesignal.appysaude.co.ao	canonical name = app-appysaude-angular-universal-prd.azurewebsites.net.
app-appysaude-angular-universal-prd.azurewebsites.net	canonical name = waws-prod-dm1-199.sip.azurewebsites.windows.net.
waws-prod-dm1-199.sip.azurewebsites.windows.net	canonical name = waws-prod-dm1-199-037a.centralus.cloudapp.azure.com.
Name:	waws-prod-dm1-199-037a.centralus.cloudapp.azure.com
Address: 20.40.202.11