Calling Equatorial Guinea from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 240 - Country Code for Equatorial Guinea
• Phone Number - 9 digits
• US to Equatorial Guinea landlines international dialing format : 011 240 3?? ??? ???

How to dial to Equatorial Guinea cellular:

• dialing format for calls to a cell phone: 011 240 222 ??? ??? (or 551 ??? ???)

Phone Books:

• Yellow Pages of Africa - business directory

Updates:

• Equatorial Guinea telephone numbering changes - March 2010