快速回答： 区号 509 是电话号码 整个华盛顿州东部，为斯波坎、亚基马、三城（肯纳威克、里奇兰和帕斯科）、沃拉沃拉、韦纳奇和普尔曼提供服务。 509 是 1947 年最初的区号之一，覆盖了美国广阔的农业和能源丰富的地区 太平洋时区 并作为单个独立代码运行，没有活动覆盖。
509 区号是多少？
区号 509 是华盛顿州东半部的电话前缀，该地区从喀斯喀特山脉的森林山坡穿过哥伦比亚盆地一直延伸到爱达荷州边境，北起加拿大，南至俄勒冈州。
从地理上讲，它是太平洋西北地区最大的地区之一，覆盖的地形从火山河峡谷和高沙漠高原到灌溉果园和连绵起伏的帕卢斯小麦田。
与 507 区号由于明尼苏达州南部的号码池逐渐减少，该公司在 2024 年增加了 924 覆盖，509 已经在不需要配套代码的情况下保住了其华盛顿东部地区——这反映了该地区与人口稠密的沿海大都市相比持续但更加谨慎的增长。
| 细节 | 价值 |
|---|---|
| 编号计划区域 (NPA) | 509 |
| 地点 | 华盛顿州东部 |
| 叠加层 | 无（独立代码） |
| 时区 | 太平洋时间（太平洋时间） |
| 投入使用以来 | 1947 |
| 状态 | 华盛顿 |
| 国家/地区代码 | +1 |
区号 509 中的市县
509 地区横跨华盛顿州东半部——从喀斯喀特山脊开始，一直延伸到爱达荷州和俄勒冈州，景观广阔而多样。从斯波坎的城市中心到瓦拉瓦拉的葡萄园山谷和亚基马河的灌溉果园，华盛顿东部将众多的工业和社区集中在一个区号中。
509地区主要城市及社区：
- 斯波坎 — 华盛顿州东部最大的城市，也是医疗保健、金融和高等教育的区域中心，斯波坎河沿岸的科技和初创企业不断发展
- 亚基马 — 亚基马山谷的商业中心，周围环绕着果园和葡萄园，出产华盛顿著名的苹果、啤酒花和酿酒葡萄
- 肯纳威克、里奇兰和帕斯科（三城） — 位于哥伦比亚河、斯内克河和亚基马河交汇处的一个快速发展的三城都会区，以汉福德核电站为中心，是该州增长最快的人口聚集区之一
- 瓦拉瓦拉 — 一座历史悠久的农业城市，以其甜洋葱、屡获殊荣的葡萄酒产区以及惠特曼学院和沃拉沃拉大学等文理学院而闻名
- 韦纳奇 — 自称为“世界苹果之都”的苹果之都，位于喀斯喀特东部斜坡的河谷中，毗邻该州一些生产力最高的果园
- 摩西湖 — 哥伦比亚盆地枢纽，服务于农业加工、冷链物流和飞行培训业务
- 普尔曼 — 华盛顿州立大学所在地，华盛顿州立大学是该州旗舰研究型和赠地大学之一
509服务区域内的县：
| 县 | 著名社区 |
|---|---|
| 斯波坎 | 斯波坎, 斯波坎谷, 切尼 |
| 亚基马 | 亚基马、Selah、Sunnyside、Grandview |
| 本顿 | 肯纳威克, 里奇兰, 西里奇兰 |
| 富兰克林 | 帕斯科 |
| 奇兰 | 韦纳奇、莱文沃思、奇兰 |
| 瓦拉瓦拉 | 瓦拉瓦拉，大学城 |
| 惠特曼 | 科尔法克斯普尔曼 |
| 授予 | 摩西湖、埃夫拉塔、昆西 |
整个509覆盖区域观察 太平洋时间（冬季为 UTC−8，DST 期间为 UTC−7）。华盛顿州东部与西雅图和整个西海岸共享时区，使得华盛顿州内的跨区域通话易于协调。来自东部时间城市的呼叫者在跨时区安排时应考虑到三个小时的差异。
509 区号简史
1947 年北美编号计划制定时，规划者从一开始就将华盛顿州划分为两个区号：206 代表以西雅图为中心的华盛顿西部，509 代表广阔的东半部。喀斯喀特山脉形成了天然的地理分界线，两个地区截然不同的经济——西部是海洋和工业，东部是农业和资源型——从一开始就使两种代码方法合乎逻辑。
七十多年来，509 号航班一直为华盛顿东部地区提供服务，没有任何分裂或重叠。虽然华盛顿西部的人口激增推动了连续的代码扩展——塔科马走廊有 253 个代码，西雅图环外的华盛顿西部社区有 360 个代码，东区郊区有 425 个代码，这些代码均于 1995 年推出，但华盛顿东部更为渐进的增长留下了 509 个代码的余地。
这 华盛顿公用事业和运输委员会 负责监督该州的电话号码，并与北美号码计划管理局一起监控 509 的可用号码池。随着斯波坎更广阔的都会区居民接近 60 万，三联市成为华盛顿增长最快的走廊之一，长期前景值得关注，但 509 进入现在，成为少数仍完好无损地服务于其创始领土的 1947 年原始代码之一。
Key milestones:
- 1947 — 509 created for eastern Washington as part of the original North American Numbering Plan
- 1995 — Western Washington codes reorganized into 206, 253, 360, and 425, leaving 509 as the sole code for the eastern half of the state
- Present — 509 remains a standalone code covering all of eastern Washington, with no overlay introduced in its nearly eight decades of service
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拨打 509 号码
Because 509 has no overlay, local calls within eastern Washington do not require the area code in the same way that overlay regions do. Even so, dialing all ten digits is the reliable standard that connects every call from any phone or carrier, and it is the format you should save for every contact.
| Calling from | Format to use |
|---|---|
| Within the 509 area | 509-XXX-XXXX (ten digits recommended) |
| Elsewhere in the US or Canada | 1-509-XXX-XXXX |
| International | +1 509 XXX XXXX |
Time zone tip: Eastern Washington observes Pacific Time — the same zone as Seattle, Portland, and Los Angeles. Calls to Chicago and Central Time face a two-hour difference; calls to New York and Eastern Time face a three-hour gap. A 9 a.m. call from the East Coast lands at 6 a.m. in Spokane, so mid-morning Eastern is the earliest practical window for reaching 509 numbers.
为什么 509 号码适合开展业务
Eastern Washington pairs world-class agricultural output with a growing energy, healthcare, and academic sector — a combination that makes a local 509 number a genuine business asset. In a region where rural communities value local relationships and view out-of-state numbers with healthy skepticism, a 509 prefix signals real geographic credibility from the first ring.
Reasons to choose a 509 area code number:
- Agriculture and food production — Eastern Washington grows roughly 70 percent of the nation's apple crop, along with the majority of its sweet cherries, a large share of wine grapes, and significant quantities of wheat, hops, potatoes, and mint — making the region one of the most productive agricultural areas in the United States
- Energy and nuclear — The Hanford Site in Richland is the world's largest nuclear cleanup project, supporting thousands of science, engineering, and logistics jobs; the Columbia Basin also hosts major hydropower infrastructure along with an expanding wind and solar sector
- Higher education and research — Washington State University in Pullman, Gonzaga University and Eastern Washington University in Spokane, and Whitman College in Walla Walla give the region a deep talent pipeline and steady flow of research activity
- Healthcare — Spokane serves as the medical hub for a multi-state catchment area covering eastern Washington, northern Idaho, western Montana, and beyond, anchored by Providence Health, MultiCare, and Shriners Children's hospital
- Virtual reach — Just as businesses connect with customers in central Massachusetts through a 508 area code number without a physical office there, a virtual 509 number routes calls to any device and establishes a genuine eastern Washington presence from any location
509区号诈骗电话需警惕
Because 509 is immediately recognized as an eastern Washington number, scammers spoof it to appear local to residents who regularly receive calls from agricultural lenders, utilities, healthcare networks, and government offices serving the region. Neighbor spoofing — displaying a 509 prefix that matches a caller's own exchange — is particularly effective in rural communities where trust in familiar local numbers is high.
Common 509 scam types to watch for:
- IRS and tax fraud — Callers threatening immediate arrest over unpaid federal taxes, a recurring scam targeting both residents and agricultural business owners, especially during and after tax season
- Agricultural and equipment fraud — Scammers posing as grain buyers, equipment dealers, or seed suppliers to extract upfront deposits or personal financial information from farmers and orchard operators across the Columbia Basin and Palouse
- Utility shutoff threats — Fraudsters impersonating Avista Utilities or Pacific Power representatives, demanding same-day payment to prevent electricity or natural gas disconnection
- Social Security suspension fraud — Automated calls claiming a Social Security number has been suspended due to suspicious activity, frequently targeting older residents in the smaller communities and rural zip codes throughout eastern Washington
- Sweepstakes and prize scams — Callers announcing lottery winnings or contest prizes that require upfront payment or personal details, disproportionately prevalent in rural areas with less exposure to consumer-protection messaging
How to protect yourself:
- Let unknown 509 calls go to voicemail and verify the caller independently before responding
- No government agency, utility, or financial institution will demand payment by gift card, wire transfer, or cryptocurrency during an unsolicited call
- Confirm any organization through the contact information listed on its official website
- Report suspected 509 scam calls to the FTC at reportfraud.ftc.gov
509区号简介
- Area code 509 covers 整个华盛顿州东部, from the eastern Cascades to the Idaho and Oregon borders
- It is one of the original 1947 area codes and has served eastern Washington without a split or overlay ever since
- 这 entire 509 region observes Pacific Time — the same zone as Seattle, Portland, and Los Angeles, and three hours behind Eastern Time
- It operates as a single standalone code with no active overlay, one of the few original area codes still serving its founding territory intact
- The economy is anchored by agriculture (apples, wine grapes, wheat), energy, healthcare, and higher education
- Major communities include Spokane, Yakima, the Tri-Cities, Walla Walla, Wenatchee, Pullman, and Moses Lake
- Common scam types include IRS fraud, agricultural scams, utility shutoff threats, Social Security fraud, and sweepstakes scams
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有关 509 区号的常见问题
509 区号是多少？
The 509 area code is a North American telephone area code covering all of eastern Washington state. One of the original area codes established in 1947, it serves Spokane, Yakima, the Tri-Cities, Walla Walla, Wenatchee, and Pullman, along with hundreds of smaller towns and rural communities across the eastern Washington landscape.
Where is the 509 area code located?
Area code 509 is located in eastern Washington state. Its coverage extends from the eastern slope of the Cascade Mountains across the Columbia Basin to the Idaho and Oregon borders, encompassing Spokane County in the northeast, the Yakima Valley in the central-south, and the Tri-Cities metro at the confluence of the Columbia and Snake rivers.
What cities use the 509 area code?
The largest cities in the 509 area code are Spokane and Yakima. Other communities include Kennewick, Richland, and Pasco (collectively the Tri-Cities), Walla Walla, Wenatchee, Moses Lake, and Pullman, along with the many smaller agricultural towns and communities spread across eastern Washington.
Does the 509 area code have an overlay?
No. Area code 509 is a standalone code with no active overlay. It remains one of the few original 1947 area codes still serving its founding territory intact, made possible by eastern Washington's lower population density compared with Washington's coastal metro areas.
What time zone is area code 509 in?
Area code 509 is in the Pacific Time Zone. Eastern Washington observes Pacific Standard Time (UTC−8) in winter and Pacific Daylight Time (UTC−7) during daylight saving time — the same zone as Seattle, Portland, and Los Angeles, and three hours behind Eastern Time cities like New York.
Why does eastern Washington have a different area code from Seattle?
When the North American Numbering Plan was established in 1947, Washington was divided into two distinct codes: 206 for western Washington, centered on Seattle, and 509 for the eastern half. The Cascade Mountains provided a natural geographic boundary, and the two regions' distinct economies made separate codes practical from the very beginning.
Is a 509 number a cell phone or landline?
A 509 number can be a cell phone, a landline, or a VoIP number. The area code is assigned to all types of telephone subscriptions across eastern Washington, so the prefix alone does not indicate whether a 509 number is mobile or fixed.
Can I get a 509 number for a business outside Washington?
Yes. Virtual phone providers offer 509 area code numbers to businesses and individuals regardless of physical location. A virtual 509 number lets you establish a local eastern Washington presence and route calls to any device anywhere in the world, with no Washington state address required.
