http://www.hq.com
2. Alliance Business Centers Network
http://www.abcn.com
3. InterOffice Online
http://www.interoffice.com
4. EBC
http://www.ebcnet.com
5. Regus
http://www.regus.com
6. Office Suites PLUS
http://www.officesuitesplus.com
7. Barrister
http://www.barrister-suites.com
8. Corporate Office Centers
http://www.corporateofficecenters.com
9. Executive Office Club
http://www.houroffice.com
10. Centris
http://www.centris.net