While I can think of one good reason (phony information in your whois record), only your webhosting provider can tell you the real reason.
The root reason appears to be that your assigned nameservers: ns1.globaltechweb.net, and ns2.globaltechweb.net, aren't responding.
While this in and of itself may not be important, globaltechweb.net IS working, and the site uses nameservers at:
kitkat1.botseller.net
kitkat2.botseller.net
Strange domain name for a nameserver, I'd think.
This forum is NOT run by your hosting company; you need to ask them.
Jeff