Clearwire Corporation (stylize as "clearw˙re" in the logo) is a wireless broadband Internet service provider (ISP) serving markets in the United States, Ireland, Belgium, Denmark (with Danske Telecom) and Mexico (via MVSNet). Clearwire was founded by cellular phone pioneer Craig McCaw in October 2003 and headquartered in Kirkland, Washington. Clearwire currently uses Expedience wireless technology, dubbed Pre-WiMax, transmitted from cell sites over licensed spectrum of 2.5-2.6 GHz in the U.S. and 3.5 GHz in Europe.