Get a local business phone number in Prosser, WA

What area code is Prosser, WA?

Prosser, in Benton County, Washington, had a Census-estimated population of 6,540 in July 2024. All 6 exchanges NANPA lists for its rate center are in area code 509. Prosser is in the Pacific time zone.

According to NANPA's dialing-plan data, local calls within 509 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Phone carriers in Prosser

5 carriers hold the 6 exchanges assigned to Prosser's rate center. United Telephone - Northwest d/b/a Centurylink - Wa has the most, with 2. 5 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.

Local prefixes for Prosser

These are the central office codes NANPA records for Prosser. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2002. None were assigned in 2020 or later.

Rate centers and local calling in Prosser

Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Prosser's numbers are rated to the PROSSER rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Prosser number.

Keeping an existing Prosser number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 509 when you pick it.

Businesses around Prosser

Prosser is part of the Kennewick-Richland, WA metro area, home to 319,000 people in 2024. County Business Patterns counted 6,928 business establishments in the Kennewick, WA metro area in 2023, employing 100,711 people. The largest sectors by establishment count are construction (1,092), health care and social assistance (890), and retail trade (807).

Setting up a Prosser business line

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 Prosser 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.

Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Kennewick, WA metro area, 15 users on RingCentral RingEX Core come to $450.00 a month and on Ooma Office Pro $374.25, at month-to-month list prices checked September 28, 2026. Callata comes to $299.00 a month for 15 users ($99 a month with 5 users included, then $20 per additional user), below both.