Investor Presentaiton

FirstNet™ is a Significant Wireless Opportunity ➤ Separate wireless 4G/LTE network that can be dedicated to First Responders in emergencies ➤ Deploying in all 50 States, territories and tribal lands ➤ Awarded to AT&T in 2017 AT&T expects to invest ~$40 Billion over the life of project Federal investment of $6.5 Billion ➤MasTec has significant opportunity under existing AT&T "Turf" contract. FirstNet™ 77 Tower Deployment; and Fiber Deployment/Interconnect Tower & fiber locations are simplified assumptions derived from First.net.gov, and are for illustration purposes only. MasTec, Inc. 2017 18

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