DS 4085 Additional Visa Pages Application Form
If you are a frequent traveler you will need to add extra visa pages to your passport. Some countries are known to refuse visitors who does not have enough pages on their passport for a visa stamp.
If you are in need of additional visa pages on your passport will need to fill out the DS-4085 Application for Additional Visa Pages.
The Application DS-4085 for Additional Visa Pages has some contact information if you have any issues filling out he DS-4085 Application.
The toll free 800 phone number and email address are also listed, usually State Department customer service would answer any questions Monday to Friday from 8 a.m. to 10 p.m. if you are living abroad you cannot use the address on the form.
You will have to contact your nearest American embassy.