Iber-X (Popularity: )
http://www.iber-x.com/ International telecom exchange. Includes registration information and contacts. [English/Spanish]
Phonetrade (Popularity: )
http://www.phonetrade.com/ Mobile phone trading portal and exchange. Includes registration information and an escrow system.
Tradingcom Europe (Popularity: )
http://www.tradingcomeurope.com/ European trader of telecommunications capacities. Includes testimonials, traditional and reverse auctions. [English/French/German]