Advertising for a Web Design company

[Rehankhan]

Two questions here;

1. Which segments would be included in the B2B target market of a web design company offering customized website designing, web hosting, domain registration and all the other value added services that a typical web designer offers.

2. What would be the best ways to advertise to those segments through the internet? Please be specific with your suggested media. For example, i know that we should send emails to the startup businesses but i want to know where to get the most valid list of those addresses so that this tactic results in a positive ROI.

Thanks,
Rehan