Get a local business phone number in Colfax, WA

Area codes in Colfax

With 2,692 residents in the Census 2024 estimate, Colfax sits in Whitman County, Washington. All 4 exchanges NANPA lists for its rate center are in area code 509. Colfax 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 Colfax

3 carriers hold the 4 exchanges assigned to Colfax's rate center. T-mobile USA, INC. has the most, with 2. 4 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Colfax can come from any of these blocks; once it is yours, porting lets it move between providers.

Exchanges (NPA-NXX) assigned in Colfax

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Colfax's rate center (COLFAX). The earliest assignment date recorded in the file for these codes is 2002. 1 of the 4 were assigned in 2020 or later.

When Colfax's exchanges were assigned

Assignment dates show when each block of Colfax numbers was added to the local supply.

Rate centers and local calling in Colfax

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

New local numbers are drawn from carrier inventory, so the exact 509 numbers available change over time; porting an existing number is free.

Who does business near Colfax

Colfax is part of the Pullman, WA micropolitan area, home to 48,399 people in 2024. County Business Patterns counted 873 business establishments in the Pullman, WA micropolitan area in 2023, employing 11,417 people. The largest sectors by establishment count are accommodation and food services (118), health care and social assistance (98), and retail trade (96).

Setting up a Colfax business line

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 Colfax, 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.

The comparison below uses 13 users, the rounded average establishment size in the Pullman, WA 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. On Callata the same 13 people cost $259.00 a month, less than either per-seat plan.