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Spirent
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<p>Spirent Communications plc is a British-American <a href="/facts/Multinational_corporation/qrMQSMTb">multinational</a> <a href="/facts/Telecommunications/vxoj1cxR">telecommunications</a> testing company headquartered in <a href="/facts/Crawley/euFRGfWf">Crawley</a>, West Sussex, in the United Kingdom. It is listed on the <a href="/facts/London_Stock_Exchange/V2AbyhM5">London Stock Exchange</a> and is a constituent of the <a href="/facts/FTSE_250_Index/ynGRn0oj">FTSE 250 Index</a>. </p>