Calling Pakistan from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 92 - Country Code for Pakistan
• Phone Number (may not begin with 0):
  • landlines - 9 or 10 digits, area code included
  • cell phones - 10 digits
• sample call from US to a landline in Karachi: 011 92 21 ???? ????

How to dial to Pakistan cellular:

• dialing format for calls to a cell phone: 011 92 3?? ??? ????

Area Codes:

Phone Books:

• Jamal's Yellow Pages