shell:$ nslookup -timeout=2 -retry=1 'oldnationalbank.my.salesforce.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
oldnationalbank.my.salesforce.com	canonical name = h.edge2.salesforce.com.
h.edge2.salesforce.com	canonical name = st.edge.viginia.edge2.salesforce.com.
st.edge.viginia.edge2.salesforce.com	canonical name = st1.edge.sfdc-yfeipo.edge2.salesforce.com.
Name:	st1.edge.sfdc-yfeipo.edge2.salesforce.com
Address: 34.226.36.51
Name:	st1.edge.sfdc-yfeipo.edge2.salesforce.com
Address: 34.226.36.52
Name:	st1.edge.sfdc-yfeipo.edge2.salesforce.com
Address: 34.226.36.53