Opus Virtual Offices offers Washington DC virtual office services that provide a corporate mailing address, live phone answering, local company phone & fax numbers all for a low fixed monthly fee of just $99.00. Opus Virtual Offices is the ultimate source for virtual office solutions with over 650 locations nationwide. Get your virtual office in the most prestigious business addresses in Washington DC today. Business Hours: 9:00 am – 5:00 pm read full review »