Customer service

ICC has been split into different testing programs on our website. You will need to know the two digit exam code before you can register for your National Certification and UST/AST exam. Each testing program will require a unique username and password. View the current exams list for the National Certification and UST/AST program.

We encourage you to schedule/purchase your exam online. Get started by logging in to your web account on the ICC - National Certification and UST/AST website. For any issues, contact us below or check our Frequently Asked Questions.

Global chat

Chat is the quickest way to reach a customer service agent.
Click on the Chat icon to get started.

If chat is “offline,” see below for telephone numbers and office hours.

Americas region

Office hours

Monday–Friday, 7:00 a.m.–10:00 p.m. CT, Saturday, 7:00 a.m.–4:00 p.m. CT, and Sunday, 9:00 a.m.–3:00 p.m. CT; closed on local holidays.

Telephone numbers

800-275-8301 (toll-free)

Email form

Ask a question

Europe, Middle East, Africa (EMEA) region

Office hours

Office Hours: 9:00–18:00 CET (8:00–17:00 GMT) Monday–Friday; closed on local holidays.

Telephone numbers

+44-161-855-7455 (toll)

Email form

Ask a question

Related links

Customer service

Global chat

Americas region

Office hours

Telephone numbers

Email form

Europe, Middle East, Africa (EMEA) region

Office hours

Telephone numbers

Email form

Pearson VUE Sections

About Pearson VUE

For test takers

For test owners

Become a test center