Where is 720 area code? 

720 – Denver, CO

What area code is 720

Colorado’s capital, Denver, is located on the Prairie area-a plain at an airy height of 1,600 meters above sea level.

It is surrounded by high mountains and offers a truly charming Panorama of this mighty mountain range. Therefore, Denver is also the ideal springboard for the Rocky Mountains. But the city has to offer for guests a lot to – in addition to the steel – and-Glass skyscrapers, there are also Remains from that period, as Denver was a gold-mining Camp.