Mark Grahame Collins

Muzicall Ltd. provides ringback tone services. It offers its services for mobile operators, corporates, charities, advertising and media companies. The firm offers ringback tone services for fun, business and advertisements. The company was founded in 2004 by Mark Collins and Richard Nigel Curzon Jackson and is headquartered in London, the United Kingdom.

Part of Deutsche Telekom AG, Sprint International, Inc. is a company based in Shawnee Mission, KS.

Part of CenturyLink Technology Solutions, Cable & Wireless USA, Inc. provides voice, data, and IP solutions for enterprises. The company is based in Vienna, VA.

Cityfibre Infrastructure Holdings Ltd. engages in the provision of telecommunication services. The company was founded in 2011 and is headquartered in London, the United Kingdom.

V-Perspect Consulting Ltd. provides information technology consultancy services. The private company is based in Stanmore, UK. The British company was founded by Mark Grahame Collins.

Part of Cityfibre Infrastructure Holdings Ltd., CityFibre Networks Ltd. is a British company that builds, owns and operates fibre optic infrastructure. The company is based in London, UK and was founded in 2010.

Part of Cityfibre Infrastructure Holdings Ltd., Fibrecity Bournemouth Ltd. provides telecommunication services. The company is based in London, UK and was founded in 2008.

Part of Cityfibre Infrastructure Holdings Ltd., CityFibre Ltd. is a British company founded in 2015 that provides ultra-fast and ultra-reliable Full Fibre connections to businesses and homes across the UK. The company is based in London, UK. The company's focus is on unleashing the full potential of businesses with their Full Fibre connections. The company also provides Full Fibre networks to the public sector.