The NYU internal telephone numbers have 5 digits start with ``2'', ``3'' , ``5'' or ``8''. Here are the rules:

• Just dial the 5-digit number if you make an internal call.

• If you call outside, dial "9" first, such as ``9xxxxxxx'' (for 212 area code) and ``91718xxxxxxx'' (for 718 area code).

• If you call from outside, add ``99'' before the 5-digit number which starts with ``2'' or ``8'', add ``44'' before the 5-digit number which starts with ``3''. For example, if you call from 212 area code, please dial something like ``992xxxx'', ``995xxxx'', ``998xxxx'' or ``443xxxx''; if you call from 718 area code, please dial something like ``1212992xxxx'', ``1212998xxxx'' or ``1212443xxxx''.
• For people who are not familiar with the telephone number in US, just keep this in mind: US phone number has a 3-digit area code and a 7-digit number, if you make a call between different areas (It could be a long distance call, such as a call between 212 and 201, or just a local call, such as a call between 212 and 718), dial ``1'' before the area code, then the number.