- City / exchange
- Coulee Dam
- Province / state
- Washington
- Country
- United States
- Carrier
- Onvoy, LLC - Wa
- Line type
- Likely VoIP / virtual number
- OCN
- 483E
- Status
- In Service
- Assigned
- 10/29/2001
- Number pooling
- Yes (block shared between carriers)
509-620 phone numbers
Coulee Dam, Washington, United States · Onvoy, LLC - Wa
Reported numbers in 509-620
No numbers in this block have been reported by visitors yet.
Complaints filed with the FCC
- 509-620-24151 complaint · 2026-10-06
What does the 509-620 prefix tell you?
Every North American number is area code + prefix + line. The prefix 509-620 was assigned to Onvoy, LLC - Wa on 10/29/2001 for the Coulee Dam exchange. A call from this block usually originates from a Onvoy, LLC - Wa customer in or near Coulee Dam, but caller ID can be spoofed to show any number.