digger16309
1-voip looks to be a good outfit.
Callcentric and Voip.MS are good providers with long track records, and many people like them because you can easily use your own equipment (such as IP phones) and both companies have a boatload of call treatment options, callblocking, etc.
I have used Callcentric for my home AND my business for well over 10 years, excellent reliability and support, very user-friendly dashboard.