Use abbreviations for Ave., Blvd. and St. with numbered addresses. Spell out and capitalize them when referencing a formal street name without a number.
When referencing two street names without a numbered address, spell out the type of street but do not capitalize it.
Abbreviate compass points when used with a number address. Spell out compass points in other uses.
Always use figures for an address number.
Spell out and capitalize First through Ninth when used as street names. Use figures and two letters for 10th and above.
Use capital letters and periods with no space when abbreviating post office box (P.O. Box).
Spell out building names.
When referencing a specific room, write the building name followed by a comma and the room number.
Use dashes, not periods. Do not put parenthesis around the area code.
The “1” is not necessary when writing long-distance or toll-free telephone numbers.