21st Century Technologies | 1,583 followers on LinkedIn. 21st Century Technologies Limited (21CTL) is a Licensed Information Communications and Technology Services provider, fully mobilized and well positioned to build converged multi-service and efficiently managed networks nationwide. 21st Century Technologies Limited has its corporate head office at Plot 249A Muri Okunola Street, Victoria Island Extension with branches nationwide. Our mission is to create a worry-free communications network that meets our customers’ IT challenges and overall business goals.