Empire City Subway Company (ECS) is a wholly owned subsidiary of Verizon that specializes in subsurface engineering and construction services. Since 1891, ECS has held a franchise from the City of New York to build and maintain a conduit and manhole infrastructure in Manhattan and the Bronx. ECS rents this space to telecommunications and cable television service providers.

ECS also provides a broad array of services to facilitate the installation, maintenance and protection of underground cables in the greater metropolitan New York City area.