I love RingCentral. You can have as many REAL phone numbers as you want and you can control routing of those phone numbers to anyone you want. You also have extensions that can be used. Three phone numbers is costing me about $60/mo when all the smoke clears with taxes included, so it's not cheap, but it's cheaper than a live human being and does a lot for me.
I use RingCentral as my one stop shop for Buyers, Sellers, Landlords interested in Property Management, Tenants, and 24 hour recorded information on properties for Sale and available rentals.
The marketing / business cards for each business route people to the correct MAIN phone number within the system and they get appropriate IVR prompts. Buyers, Sellers, and Landlord Owners get to me very quickly. Tire Kickers on yard signs go to 24 hour recorded information where they get the option to get to me at the end of the recording. Prospective and Current Tenants always go to voicemail and I return the call at my convenience.
Phone #1 - Buyers/Sellers & Buy/Sell tire kickers... "If you're calling from a yard sign and know the extension, enter it now. To speak with me, press 1".
Phone #2 - Landlords... routes to me if I'm available. If not, a brief message stating that I will call them back.
Phone #3 - Tenants - VOICEMAIL.
If I go on vacation, I can have these numbers route to the person who is helping me out. If it's 2:30 in the morning and someone tries to call, it goes to voicemail.
I also have a "Soft Phone" on my laptop, so I can make and receive calls anywhere in the world that I have a decent internet connection, even if I'm goofing off in some part of the world where cell phone roaming charges would be outrageous.
Think of the 80/20 rule when you consider the cost of having a tool like this. 20% of the stuff you do makes you money. 80% is the stuff you should not be dealing with personally. This tool helps with some of that 80%.