Area code 405 is an area code created for Oklahoma. It was one of the first area codes created in October 1947. It initially covered the entire state of Oklahoma, but after it was split by 918 in 1953[1] and 580 in 1997,[2] it now covers the central portion of the state. It was overlaid by 572 in 2021.[3]
- ↑ Griffin, David. "405 Exhausted, OKC Metro To Get New Area Code". www.news9.com. Retrieved 2022-03-19.
- ↑ Griffin, David. "405 Exhausted, OKC Metro To Get New Area Code". www.news9.com. Retrieved 2022-03-19.
- ↑ Oklahoma, Janelle Stecklein | CNHI News. "Central Oklahoma adding 572 area code". Norman Transcript. Retrieved 2022-03-19.