The number 203 is an integer that follows 202 and precedes 204. It is an even number, meaning it is divisible by 2. In mathematics, 203 can be expressed as the product of its prime factors, which are 7 and 29. This makes it a composite number, as it has divisors other than 1 and itself. In the context of area codes, 203 is the telephone area code for parts of Connecticut, including cities like Bridgeport and New Haven. Established in 1947, it was one of the original area codes in the United States and continues to serve a significant population in the region.