The main cities in Delaware are:
Wilmington (302), Dover (302), Newark (302), Middletown (302), and Bear (302). As you can see Delaware only has one area code which was assigned in 1947.
The main airport in Delaware is the Wilmington Airport.
The main businesses in Delaware are related to science and technology, education and healthcare and finally business and financial services. You can contact these type of businesses near you using Whatsapp.