No matter where you call in Wyoming, whether it's Laramie, Casper, or Cheyenne, they all start with 307.

The entire state uses just the area code 307. There are only 11 states in the U.S. with a single area code, and Wyoming is one of them.

The 307 area code was first put into service in 1947. It was one of the original 86 area codes established when AT&T and the Bell System created the North American Numbering Plan (NANP). Since then, Wyoming has consistently used just 307.

With a small population, there has been no need to add a new area code, and Wyoming is also the least populated state in the U.S., so it makes sense. However, the fact that it has remained unchanged since 1947 feels quite special.

As a result, the people of Wyoming have developed a strong attachment to the number 307. March 7th is officially designated as 307 Day. It has become a part of their identity, not just a number. Living in Cheyenne, I notice that whenever I save the numbers of new people I meet, 307 naturally comes up, highlighting how closely connected this community is.

You can feel the unique, tight-knit community vibe of Wyoming even in just one number. Whether I'm saving the vet's number for my cats or a neighbor's contact, it's all 307. Each time I save a number, it feels like I'm gradually making Cheyenne my own.

From a practical standpoint, it's also convenient to know. Within Wyoming, calls between regions all use the same 307 area code, making the numbering system simple. However, when making calls, the charges may vary depending on whether it's long-distance, so it's good to check based on your plan, especially if you're using an old landline. Nowadays, most people use unlimited plan smartphones, so it's not a big concern, but knowing this basic information when you first move here can help avoid confusion. I remember being surprised at first that all the calls within Wyoming had the same code.

Here's a little tip for newcomers to Wyoming: the three digits 307 represent the entire state, which includes Casper, Jackson Hole, Cheyenne, and the whole state, which is the 10th largest in the U.S. This simplicity feels very Wyoming-like.

It's uncomplicated, straightforward, and has a sense of unity. When you move here, the first three digits of the number you save will likely be 307. From that point on, it feels like you officially become a Wyoming resident. I hope my detailed notes can help someone.

The affection that residents have for the number 307 is more serious than you might think. You can often see 307 on T-shirts, bumper stickers, and local brand names. It's an interesting example of how a number has become part of the local identity. At first, I thought it was just an area code, but

now when I see 307, it somehow makes me feel like the vast state of Wyoming is one community. Living in a neighborhood connected by this number with my cats gives me a warm feeling. For newcomers, the first number you save will likely be a neighbor's number starting with 307.