Investors

We welcome your comments. Security analysts and representatives of portfolio management firms may contact Bob Butter at:

Tollgrade Communications, Inc.
493 Nixon Road
Cheswick, PA 15024
412-820-1347
Email: bbutter@tollgrade.com

Tollgrade's transfer agent is BNY Mellon Shareowner Service. Inquiries concerning transfer requirements, lost certificates and change of address should be directed to:

BNY Mellon Shareowner Service
480 Washington Boulevard
Jersey City, NJ 07310-1900
1.800.756.3553

TDD for the hearing impaired: 1.800.231.5469
Foreign shareholders: +1.201.680.6578
TDD for foreign shareholders: +1.201.680.6610
www.bnymellon.com/shareowner/isd

All other inquiries should be directed to:

Investor Relations Department
Tollgrade Communications, Inc.
493 Nixon Road
Cheswick, PA 15024