BT Wholesale ( www.btwholesale.com )
Cable & Wireless ( www.cw.com/uk/ )
Carphone Warehouse ( www.carphonewarehouse.com )
Colt Telecom ( www.colt.net )
Easynet/Sky ( www.easynet.net or www.sky.com )
KCom (www.kcom.com )
Orange (www.orange.co.uk/ )
Thus ( www.thus.net/ )
T-Mobile ( www.t-mobile.co.uk )
VirginMedia (www.virginmedia.com)
Vodafone ( www.vodafone.co.uk )
Gamma Telecom (www.gammatelecom.com/ )
Global Crossing (www.globalcrossing.com/ )
Hutchison 3G (Three) ( www.three.co.uk/indexcompany.omp )
O2 ( www.o2.co.uk )
Tiscali ( www.tiscali.co.uk/ )
Verizon Business ( www.verizonbusiness.com/uk/ )
Federation of Communication Services ( www.fcs.org.uk/ )