CallataGuidesGet a local business phone number in Maple Valley, WA
Maple Valley's area code, prefixes and carriers from NANPA records, and how to put a Maple Valley number in front of your customers.
- Area code
- 425
- Exchanges
- 11NANPA-assigned
- Carriers
- 6
- Population
- 28,553Census 2024 est.
What area code is Maple Valley, WA?
Maple Valley city is a Census place in King County, Washington, with an estimated 28,553 residents in 2024. All 11 exchanges NANPA lists for its rate center are in area code 425. Maple Valley is in the Pacific time zone.
According to NANPA's dialing-plan data, local calls within 425 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 425 | 11 | 100% | 1997 | none | Pacific |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Maple Valley exchanges by carrier
6 carriers hold the 11 exchanges assigned to Maple Valley's rate center. Level 3 Communications, LLC - Wa has the most, with 3. 9 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Maple Valley can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Level 3 Communications, LLC - Wa | 3 | 27% |
| Qwest Corporation | 3 | 27% |
| Onvoy, LLC - Wa | 2 | 18% |
| Teleport Communications America, LLC - Wa | 1 | 9.1% |
| Level 3 Telecom of Washington, LLC - Wa | 1 | 9.1% |
| Mcimetro Access Transmission Services LLC | 1 | 9.1% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Maple Valley phone prefixes
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Maple Valley. The earliest assignment date recorded in the file for these codes is 2002. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 425 | 310, 358, 413, 432, 433, 437, 569, 578, 584, 660, 906 |
Source: NANPA utilized central office code file.
What makes a number local to Maple Valley
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Maple Valley's numbers are rated to the MAPLE VLY rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Maple Valley number.
If your business already has a Maple Valley number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Businesses around Maple Valley
Maple Valley is part of the Seattle-Tacoma-Bellevue, WA metro area, home to 4.1 million people in 2024. County Business Patterns counted 110,685 business establishments in the Seattle, WA metro area in 2023, employing 1,884,361 people. The largest sectors by establishment count are professional, scientific, and technical services (14,812), construction (13,610), and health care and social assistance (13,557).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 3,876 | 65,711 | 17.0 |
| Offices of real estate agents and brokers | 3,449 | 9,353 | 2.7 |
| Limited-service restaurants | 2,939 | 48,471 | 16.5 |
| Residential remodelers | 2,882 | 10,444 | 3.6 |
| Dental offices | 2,189 | 18,592 | 8.5 |
| Law offices | 2,146 | 15,271 | 7.1 |
| Physician practices | 1,630 | 37,420 | 23.0 |
| Landscaping services | 1,583 | 11,001 | 6.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Maple Valley
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 Maple Valley, 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 17 users, the rounded average establishment size in the Seattle, WA metro area. At list prices checked September 28, 2026, that is $424.15 a month on Ooma Office Pro and $510.00 on RingCentral RingEX Core. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $339.00 | $4,068.00 |
| Quo (Starter) | $19.00 per user | $323.00 | $3,876.00 |
| Nextiva (Core) | $23.00 per user | $391.00 | $4,692.00 |
| Ooma (Office Pro) | $24.95 per user | $424.15 | $5,089.80 |
| Dialpad (Standard) | $27.00 per user | $459.00 | $5,508.00 |
| RingCentral (RingEX Core) | $30.00 per user | $510.00 | $6,120.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Frequently asked questions
What area code is Maple Valley, WA?
425. All exchanges NANPA lists for Maple Valley are in 425.
How many phone companies have exchanges in Maple Valley?
6, holding 11 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Maple Valley business number?
Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.
How much is a business phone line in Maple Valley?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 17 users come to $339.00 a month. For comparison, 17 users on RingCentral RingEX Core list at $510.00 a month (checked September 28, 2026).