In today’s business world, in order to appear professional, always get a proper domain name for your site. Never list your site in a free register directory like hotfrog without any urls.
Just set up a simple site to enable your customers to find and contact you.
Today, we do not keep name cards or if we do we tend to lose them.
And you would cause the traffic to go to your competitors who may advertise or use the adwords for Google searches with your business name.
I have written more of this in the following link.