Returns an address's nametag such as "Coinbase 10", as well as associated labels such as "exchange".
https://api.etherscan.io/v2/api
?chainid=1
&module=nametag
&action=getaddresstag
&address=0xA9D1e08C7793af67e9d92fe308d5697FB81d3E43
&apikey=YourApiKeyToken