Calling Congo from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 242 - Country Code for Congo
• Phone Number - 9 digits, first digit is 2 for landlines and 0 for cell phones
• US to Congo international dialing format: 011 242 ?? ??? ????

How to dial to Congo cellular:

• dialing format for calls to a cell phone: 011 242 0? ??? ????

Landline numbers in largest cities:

• Brazzaville: 22 28? ????
• Pointe-Noire: 22 29? ????
• Likouala: 22 22? ????

Phone Books:

• Annuaire Congo - commercial directory published by Africannuaire, in French

Updates:

• Congo telephone numbering changes - October 2010