In Version 7.94 and higher:

 In a Constituent Import:


Key Indicator (KeyInd)
Import ID (ImportID) (or Constituent ID)
Last Name (LastName)
Phone Import ID (PhoneImpID)
Phone Type (PhoneType)
Phone Number (PhoneNum)


In Version 7.93 and earlier versions:

In a Constituent Import:

Key Indicator (KeyInd)
Import ID (ImportID) (or Constituent ID)
Last Name (LastName)
Address Import ID (PhoneAddrImpID)
Phone Import ID (PhoneImpID)
Phone Type (PhoneType)
Phone Number (PhoneNum)

For more information, see How to import constituent name, address, and phone numbers including multiple phone numbers and email addresses (includes sample data file)