WASHINGTON, Oct 26 (Reuters) - China Netcom, one of China's big four telecommunications operators, on Tuesday estimated the price of its planned initial public offering of 47.1 million American Depositary Shares at between $20.24 and $23.12 per ADS.

The Beijing-based company could raise as much as $1.1 billion from the U.S. IPO based on the terms disclosed in an amended offering document filed with the U.S. Securities and Exchange Commission.

Each ADS represents 20 common shares, for a total of 941.4 million common shares in the U.S. offering, according to the IPO document. China Netcom said it plans to sell an additional 104.6 million common shares in Hong Kong, for a global offering of more than 1 billion common shares.