# MAC Address Validator Validate MAC addresses and identify vendor information > Canonical page: https://elysiatools.com/en/tools/mac-address-validator - **Category:** Validation - **Keywords:** mac, address, validator, network, ethernet, wifi, hardware, vendor ## Overview The MAC Address Validator is a straightforward tool that checks the format of MAC addresses and identifies the associated vendor or manufacturer. It helps ensure network addresses are correctly formatted and provides useful hardware information for network management. ## Inputs - **MAC Address** (text): Enter MAC address (e.g., 00:1A:2B:3C:4D:5E)... ## When to use - When configuring network devices and need to verify MAC address format to avoid setup errors. - During troubleshooting to identify the vendor of a device based on its MAC address for compatibility or support. - For security audits to validate and catalog MAC addresses in a network for unauthorized device detection. ## How it works - Enter the MAC address in the input field, such as '00:1A:2B:3C:4D:5E'. - The tool validates the address against standard MAC address formats, including colon-separated, hyphen-separated, and dot-separated styles. - It then looks up the vendor information using the OUI (Organizationally Unique Identifier) portion of the MAC address from public databases. - Outputs whether the address is valid and displays the vendor name if found, or indicates if it's unregistered. ## Use cases - Network administrators verifying device MAC addresses during router or switch setup to ensure correct configuration. - IT support technicians identifying hardware vendors for device compatibility checks or warranty inquiries. - Security professionals auditing network devices to detect unauthorized MAC addresses and prevent spoofing attacks. ## Frequently asked questions ### What is a MAC address? A MAC address is a unique identifier assigned to network interfaces for communications on a network segment, typically used in Ethernet and Wi-Fi. ### How does the validator check MAC addresses? It checks if the input matches common MAC address formats like XX:XX:XX:XX:XX:XX or XX-XX-XX-XX-XX-XX, ensuring proper length and character validity. ### Can it identify the vendor for any MAC address? It can identify vendors for MAC addresses where the OUI is registered in public databases, but some addresses may be unregistered or spoofed. ### What formats are supported? The tool supports MAC addresses in colon-separated, hyphen-separated, and dot-separated formats, such as 00:1A:2B:3C:4D:5E or 001A.2B3C.4D5E. ### Is the vendor information always accurate? Vendor information is based on public OUI databases and is generally accurate, but it may not reflect recent changes or private assignments. ## Related tools - [ISBN Validator](https://elysiatools.com/en/tools/isbn-validator): Validate ISBN-10 and ISBN-13 book number formats with checksum verification - [VIN Validator](https://elysiatools.com/en/tools/vin-validator): Validate 17-character Vehicle Identification Number (VIN) format and checksum - [UUID Validator](https://elysiatools.com/en/tools/uuid-validator): Validate UUID format, detect version, and analyze UUID structure including variant, timestamp, and node information - [Credit Card Validator](https://elysiatools.com/en/tools/credit-card-validator): Validate credit card numbers and identify card type (Visa, MasterCard, UnionPay, etc.) - [Tracking Number Validator](https://elysiatools.com/en/tools/tracking-number-validator): Identify and validate tracking numbers from FedEx, UPS, DHL, USPS, SF Express (顺丰) and other major carriers - [US EIN Validator](https://elysiatools.com/en/tools/us-ein-validator): Validate United States Employer Identification Number (EIN) format used for business tax identification - [JSON Formatter](https://elysiatools.com/en/tools/json-formatter): Format and validate JSON data - [CUSIP Validator](https://elysiatools.com/en/tools/cusip-validator): Validate 9-character CUSIP North American securities identifiers with mod-10 check-digit verification, issuer base and issue-number breakdown. ## Samples - [MAC Address Samples](https://elysiatools.com/en/samples/mac-address): Collection of MAC addresses in various formats for validation testing - [IP Address Samples](https://elysiatools.com/en/samples/ip-address): Collection of IPv4 and IPv6 addresses in various formats for validation testing - [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion - [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion ## Related content - [Network Infrastructure Identifier Format Checks](https://elysiatools.com/en/hubs/network-infrastructure-identifier-format-checks): Check IPv4 and IPv6 addresses, CIDR values, MAC addresses, AWS ARNs, and Docker image references before downstream processing, while keeping format evidence separate from reachability, ownership, permissions, and image availability. - [Network Triage, Packet Inspection, and Endpoint Debugging](https://elysiatools.com/en/hubs/network-triage-debugging): Inspect captures, replay webhooks, validate addresses and CIDR ranges, check DNS, WHOIS, hosts files, TLS, and user agents, then record a focused network diagnosis.