We now use dots instead of hyphens or parentheses. In most cases, omit the 1 that precedes the area code for landline dialing. However, there may be times when it is important to add it.
Any phone number involving extra digits or unusual number sequences (such as overseas numbers) should provide every digit the caller needs in order to place the call. Example, a call to Darwin, Australia:
011 International prefix used to dial outside of USA
61 International country code used to dial to Australia
8 Local area or city code used to dial to Darwin
LN The local number
Example: 011.61.8.local number