Area code 307

Where area code 307 is

NANPA lists 307 as an in-service geographic area code for Wyoming, first put into service on January 1, 1947. It is not part of an overlay, so every number in its territory starts with 307. It is in the Mountain time zone. The places with the most assigned exchanges include Cheyenne, Casper, Jackson, Gillette, and Laramie. By population, its largest named places are Cheyenne, Casper, Gillette, Laramie, and Rock Springs.

Cities and towns in area code 307

307 holds 100% of the 499 central office codes assigned in Wyoming, the most of any code in the state. 62 Census places could be matched to rate centers with 307 exchanges; the most populous are Cheyenne (65,704), Casper (58,823), Gillette (33,846), and Laramie (32,957). For a storefront or service area inside 307, the place pages show which prefixes are rated local there.

Dialing 307 numbers

According to NANPA's dialing-plan data, local calls within 307 are dialed as seven digits and toll calls as 1 plus ten digits. Seven-digit local dialing is still permitted here, but customers calling from other area codes, and every mobile contact list, use all ten digits.

Who holds 307 exchanges

52 carriers hold the 499 central office codes assigned in 307. Qwest Corporation has the most, with 83 (17%). 279 of the codes (56%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Rate centers and towns in 307

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 307 has codes in 92 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

Number supply in 307

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 499 are assigned in 307, 62% of 800. 88 were assigned in 2020 or later.

A local 307 number on Callata

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in area code 307, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.