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For general IR-related questions:

Investor Relations
6001 America Center Drive, 6th Floor
San Jose, CA 95002 USA
408-404-6305
investor.relations@viavisolutions.com

For stock certificates, change of address, etc:

American Stock Transfer & Trust
6201 15th Avenue
Brooklyn, NY 11219
(718) 921-8200
(800) 937-5449 (Toll Free)
info@amstock.com
www.amstock.com