什么是 MAC 地址
MAC 地址（Media Access Control Address），直译为媒体访问控制地址，也称为局域网地址、以太网地址或物理地址，是网络设备接口的唯一标识符。
MAC 地址由 IEEE（电气和电子工程师协会）负责分配和管理，长度为 48 位（6 个字节），通常表示为 12 个十六进制数，每两位十六进制数之间用冒号或连字符分隔，如：00:1A:2B:3C:4D:5E。
MAC 地址结构说明
一个标准的 48 位 MAC 地址分为两部分：
- OUI（Organizationally Unique Identifier） - 前 24 位（3 个字节），由 IEEE 分配给厂商的组织唯一标识符
- 厂商分配部分 - 后 24 位（3 个字节），由厂商自行分配给具体的网络设备
OUI 的作用
OUI 是厂商在全球网络领域的唯一身份标识，拥有 OUI 后，厂商就可以自由地为自己生产的网络设备分配完整的 MAC 地址。
| MAC 地址块类型 |
可用 MAC 地址数量 |
适用场景 |
| MA-L / OUI（24 位） |
16,777,216 个 |
大规模生产网络设备的厂商 |
| MA-M (28 位) |
1,048,576 个 |
中等产量设备厂商 |
| MA-S (36 位) |
4,096 个 |
小规模生产厂商 |
为什么需要申请 MAC 地址
如果您的企业生产以下产品，就需要申请合法的 MAC 地址/OUI：
- 以太网交换机、路由器、网关等网络设备
- 无线网卡、WiFi 模块、蓝牙模块
- IP 摄像头、网络录像机（NVR）
- 工业以太网设备、物联网设备
- 智能硬件、带网络功能的消费电子产品
- 任何需要连接以太网或无线网络的设备
使用合法 MAC 地址的重要性
- 全球唯一性 - 避免网络中出现地址冲突，保证设备正常联网通信
- 合规性 - 符合 IEEE 国际标准，通过各国认证（如 FCC、CE 等）时需要提供
- 品牌标识 - OUI 记录了厂商信息，提升品牌认可度和产品可追溯性
- 互联互通 - 保证设备能与全球各种网络设备正常互联互通
- 避免法律风险 - 使用他人 MAC 地址可能引发知识产权纠纷
⚠️ 需要注意
私自使用他人分配的 MAC 地址块不仅可能造成网络冲突，还可能涉及侵权。正规生产网络设备的厂商都应该向 IEEE 申请自己专属的 OUI/MAC 地址块。
MAC 地址申请流程
通过深圳市英利标准检测技术有限公司申请 MAC 地址/OUI，流程简单便捷：
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咨询沟通
联系我们，告知您需要的 MAC 地址块大小，我们会为您说明费用和周期
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提交资料
提供企业基本信息：公司名称、地址、联系人、邮箱、电话等
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支付费用
支付申请费用，我们协助处理 IEEE 官方申请流程
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获取 OUI
一般在 15-30 个工作日内完成申请，加急服务最快 1 个工作日出号
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后续维护
我们提供后续信息变更等技术支持服务
申请所需材料
- 企业营业执照复印件
- 申请人联系方式（电话、邮箱）
- 企业地址信息
- 联系人姓名及职位
费用说明
IEEE 根据申请的 MAC 地址块类型收取不同费用，具体费用如下（价格会随 IEEE 官方年度调整，每年 12 月 31 日上调约 3%）：
💰 费用参考（以 IEEE 官方最新公布为准）
MA-L / OUI（24 位） - 约 1677 万个地址
公开注册：约$2,575 美元（一次性）
保密注册：约$5,555 美元 + 年费约$2,980 美元
MA-M（28 位） - 约 104 万个地址
费用适中，适合中批量生产
MA-S（36 位） - 4096 个地址
费用最低，适合小批量产品
* 注：以上为 IEEE 官方收费标准参考，实际费用请以申请时 IEEE 官网公布为准。我们提供代理申请服务，服务费另计，具体请联系咨询。
常见问题 FAQ
OUI 申请下来后是永久属于我的吗？
不是，OUI 是按年度续费的，需要每年向 IEEE 缴纳年费。如果未按时续费，OUI 会被 IEEE 收回。我们可以协助您进行年度续费处理。
申请成功后在哪里可以查到我的 OUI 信息？
申请成功后，IEEE 会在官方的 OUI 注册数据库中公布您的 OUI 信息，任何人都可以通过 IEEE 官网查询到。这也是 OUI 全球公信力的体现。
一家企业可以申请多个 OUI 吗？
可以。根据业务需要，一家企业可以申请多个不同大小的 OUI 地址块。我们曾协助多家企业申请多个 OUI 用于不同产品线。
申请后可以更改企业信息吗？
可以。如果企业名称、地址等信息发生变更，我们可以协助您向 IEEE 申请更新信息，确保 OUI 信息始终准确。
MAC 地址和 IP 地址有什么区别？
MAC 地址是设备的物理硬件地址，用于链路层通信，在出厂时（或由厂商分配）固定不变，全球唯一；IP 地址是网络层地址，用于互联网路由，会根据网络环境变化。一个完整的网络通信需要同时使用 MAC 地址和 IP 地址。
What is a MAC Address
A MAC address (Media Access Control Address) is a unique identifier assigned to a network interface controller for use as a network address in communications within a network segment.
MAC addresses are managed and assigned by the Institute of Electrical and Electronics Engineers (IEEE). A MAC address is 48 bits (6 bytes) long, typically represented as 12 hexadecimal digits, such as: 00:1A:2B:3C:4D:5E.
MAC Address Structure
A standard 48-bit MAC address consists of two parts:
- OUI (Organizationally Unique Identifier) - The first 24 bits (3 bytes), assigned by IEEE to the organization
- Vendor Assigned Part - The last 24 bits (3 bytes), assigned by the organization to specific devices
Purpose of OUI
An OUI is your company's unique identifier in the global networking field. Once you have an OUI, you can freely assign complete MAC addresses to the network devices you produce.
| MAC Block Type |
Number of MAC Addresses |
Typical Use |
| MA-L / OUI (24 bits) |
16,777,216 |
Large volume network device manufacturers |
| MA-M (28 bits) |
1,048,576 |
Medium volume manufacturers |
| MA-S (36 bits) |
4,096 |
Small volume production |
Why You Need to Apply for MAC Addresses
If your company produces any of the following products, you need a legally registered MAC address/OUI:
- Network devices such as Ethernet switches, routers, gateways
- Wireless network cards, WiFi modules, Bluetooth modules
- IP cameras, network video recorders (NVR)
- Industrial Ethernet devices, IoT devices
- Smart hardware, consumer electronics with network connectivity
- Any device that needs to connect to Ethernet or wireless networks
Importance of Using Legitimate MAC Addresses
- Global Uniqueness - Avoid address conflicts in networks, ensuring normal network communication
- Compliance - Comply with international IEEE standards, required for certifications like FCC, CE, etc.
- Brand Identification - OUI records manufacturer information, enhancing brand recognition and product traceability
- Interoperability - Ensure your devices can properly interconnect with various network devices globally
- Avoid Legal Risks - Using someone else's MAC addresses may lead to intellectual property disputes
⚠️ Important Note
Using MAC address blocks assigned to others without permission can not only cause network conflicts but may also involve infringement. Manufacturers producing legitimate network equipment should apply for their own dedicated OUI/MAC block from IEEE.
MAC Address Application Process
Through Shenzhen Yingli Standard Testing Technology Co., Ltd., applying for MAC address/OUI is simple and convenient:
-
Consultation
Contact us, tell us the size of MAC block you need, we will explain the cost and timeline
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Submit Information
Provide basic company information: company name, address, contact person, email, phone, etc.
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Payment
Pay the application fee, we will handle the official IEEE application process for you
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Get Your OUI
Application is typically completed within 15-30 working days, expedited service available in as fast as 1 working day
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Ongoing Support
We provide technical support services for future information changes
Required Documents
- Company business license copy
- Applicant contact information (phone, email)
- Company address details
- Contact person name and position
Fee Information
IEEE charges different fees based on the type of MAC block applied for. Fees are subject to annual adjustment by IEEE (approximately 3% increase each December 31st):
💰 Fee Reference (Subject to IEEE Official Updates)
MA-L / OUI (24 bits) - ~16.77 million addresses
Public Registration: ~$2,575 USD (one-time)
Confidential Registration: ~$5,555 USD + Annual fee ~$2,980 USD
MA-M (28 bits) - ~1.04 million addresses
Moderate cost, suitable for medium volume production
MA-S (36 bits) - 4,096 addresses
Lowest cost, suitable for small volume production
* Note: The above are reference fees from IEEE. Actual fees are subject to IEEE official website at the time of application. We provide agency application services with additional service fees. Please contact us for details.
Frequently Asked Questions
Is the OUI permanently mine after application?
No, OUIs require annual renewal with fee payment to IEEE. If the annual fee is not paid on time, the OUI will be revoked by IEEE. We can assist you with annual renewal processing.
Where can my OUI information be found after successful application?
After successful application, IEEE will publish your OUI information in the official OUI registration database, which is publicly searchable through the IEEE website. This is part of the global credibility of the OUI system.
Can a company apply for multiple OUIs?
Yes. Depending on business needs, a company can apply for multiple OUI blocks of different sizes. We have assisted many companies in applying for multiple OUIs for different product lines.
Can I change company information after application?
Yes. If your company name, address or other information changes, we can assist you in applying to IEEE to update your information, ensuring OUI information remains accurate.
What's the difference between a MAC address and an IP address?
A MAC address is the physical hardware address of a device used for link-layer communication, fixed at manufacture (or assigned by the manufacturer) and globally unique. An IP address is a network-layer address used for Internet routing and changes depending on the network environment. Complete network communication requires both MAC and IP addresses.