Complex sentence: The 246 area code was created during a split from the original +1 809 area code, which began permissive dialing on 1 July 1996 and ended permissive on 15 January 1997 at which time all calls placed to Barbados required the use of the prefix +1 246 prefix.
Split into simpler sentences: The 246 area code was created during a split from the original +1 809 area code, which began permissive dialing on 1 July 1996 and ended permissive on 15 January 1997. By 15 January 1997 all calls placed to Barbados required the use of the prefix +1 246 prefix.