npm ERR! network getaddrinfo ENOTFOUND proxy issue

I used a proxy long back i.e proxy.ssn.net:8080. But now I am not behind any proxy but I am not able to install "express". I disabled the proxy and firewall. I ran all the below commands.

npm config rm proxy

npm config rm https-proxy

npm config delete http-proxy

npm config delete https-proxy

set HTTP_PROXY=null

set HTTPS_PROXY=null

npm config delete proxy

npm config get proxy

Attached screenshot of the error. Please let me know the error.enter image description here

via Akkineni Ajay