Spirent Communications plc is a multinational telecommunications testing company headquartered in Crawley, West Sussex, in the United Kingdom. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.

Traded as:           LSE: SPT

Industry:              Telecommunications

Founded:            1936

Headquarters:   Crawley, West Sussex, United Kingdom (Corporate); San Jose, California, United States (Operational)

Products:             Network diagnostics

Website:              www.spirent.com