Get a local business phone number in Green River, WY

What area code is Green River, WY?

Green River city is a Census place in Sweetwater County, Wyoming, with an estimated 11,474 residents in 2024. All 10 exchanges NANPA lists for its rate center are in area code 307. Green River is in the Mountain time zone.

According to NANPA's dialing-plan data, local calls within 307 are dialed as seven digits and toll calls as 1 plus ten digits.

Who holds Green River phone exchanges

5 carriers hold the 10 exchanges assigned to Green River's rate center. Bandwidth.com CLEC, LLC - WY has the most, with 3. 4 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.

Green River phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Green River's rate center (GREENRIVER). The earliest assignment date recorded in the file for these codes is 2003. 2 of the 10 were assigned in 2020 or later.

When Green River's exchanges were assigned

The table groups Green River's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in Green River

What a caller sees as "local" is the area code plus prefix. In Green River, those come from the GREENRIVER rate center, as recorded by NANPA.

New local numbers are drawn from carrier inventory, so the exact 307 numbers available change over time; porting an existing number is free.

Businesses around Green River

Green River is part of the Rock Springs, WY micropolitan area, home to 41,273 people in 2024. County Business Patterns counted 1,219 business establishments in the Rock Springs, WY micropolitan area in 2023, employing 15,361 people. The largest sectors by establishment count are retail trade (153), construction (126), and accommodation and food services (119).

A Green River number on Callata

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

Porting a number you already use in Green River is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 13 users, the rounded average establishment size in the Rock Springs, WY micropolitan area. At list prices checked September 28, 2026, that is $324.35 a month on Ooma Office Pro and $390.00 on RingCentral RingEX Core. Callata comes to $259.00 a month for 13 users ($99 a month with 5 users included, then $20 per additional user), below both.