Calling Sierra Leone from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 232 - Country Code for Sierra Leone
• Phone Number (may not begin with 0) - 8 digits, area code included for fixed lines
• US to Sierra Leone international dialing format: 011 232 ?? ??? ???

How to dial to Sierra Leone cellular:

• dialing format for calls to a cell phone: 011 232 XX ??? ???
• XX can be: 21, 25, 30, 33, 34, 40, 44, 50, 55, 76, 77, 78, 79, 88

Area Codes:

Phone Books:

• VisitSierraLeone.org - a guide to Sierra Leone, also listing some helpful phone numbers