How accurate is the MAC address data?

All data is sourced directly from the official IEEE Standards OUI Registry. We update the database daily to reflect new registrations and changes. For legally binding information, consult IEEE directly.

MAC Address Lookup - MAC Address Vendor Lookup

Q: What MAC address formats are supported?

All formats are accepted: colon-separated (00:1A:2B:3C:4D:5E), hyphen-separated (00-1A-2B-3C-4D-5E), plain hex (001A2B3C4D5E), Cisco dot notation (001A.2B3C.4D5E), and dot-per-byte (00.1A.2B.3C.4D.5E). You can also search partial OUI prefixes.

Q: Can I search by company or vendor name?

Yes. Type any company name such as Cisco, Apple, Samsung or Raspberry Pi to find all MAC prefixes registered to that organisation in the IEEE OUI database.

Q: How often is the database updated?

We update the IEEE OUI database every day. This covers all block types: MA-L, MA-M, MA-S, CID and IAB. New vendor registrations appear within 24 hours.

Q: What are MA-L, MA-M, MA-S, CID and IAB?

These are IEEE MAC address block types. MA-L (Large) is the classic 24-bit OUI for large manufacturers. MA-M (Medium) uses 28-bit prefixes. MA-S (Small) uses 36-bit prefixes for small vendors and IoT devices. CID is used for non-Ethernet protocol contexts. IAB is a legacy type replaced by MA-S in 2014.

Database Statistics

Live Overview

33,802

Total Vendors

58,700

Total MAC Addresses

15 Sep 2026, 06:30 PM IST

Last Updated

17,327

Total Visits

MA-L

40,133 68.4%

MA-M

6,584 11.2%

MA-S

7,189 12.2%

CID

219 0.4%

IAB

4,575 7.8%

Download Complete Database — Get the full IEEE vendor list in CSV, JSON or XML. Always the latest data.

Recently Updated

Last 25 entries added or changed

#	MAC Prefix	Vendor Name	Block	Address
1	00:B5:C7	VusionGroup	MA-L	Kalsdorfer Straße 12 Fernitz-Mellach Steiermark AT 8072
2	00:FB:4A	Espressif Inc.	MA-L	Vistra Corporate Services Centre, Wickhams Cay II Road Town Tortola VG VG1110
3	10:A7:1A	Nanjing Qinheng Microelectronics Co., Ltd.	MA-L	No.18, Ningshuang Road Nanjing Jiangsu CN 210012
4	14:BA:A2	Extreme Networks, Inc.	MA-L	2121 RDU Center Drive Morrisville US 27560
5	1C:42:B8	Taicang T&W Electronics	MA-L	89# Jiang Nan RD Suzhou Jiangsu CN 215412
6	20:26:80	Samsung Electronics Co.,Ltd	MA-L	#94-1, Imsoo-Dong Gumi Gyeongbuk KR 730-350
7	20:CC:73	Samsung Electronics Co.,Ltd	MA-L	#94-1, Imsoo-Dong Gumi Gyeongbuk KR 730-350
8	2C:A2:E5	Cisco Systems, Inc	MA-L	80 West Tasman Drive San Jose CA US 94568
9	30:6A:4F	Roku, Inc	MA-L	1173 Coleman Ave San Jose CA US 95110
10	30:96:4C	EGYM SE	MA-L	Einsteinstraße 172 München Bayern DE 81677
11	30:DE:52	Samsung Electronics Co.,Ltd	MA-L	#94-1, Imsoo-Dong Gumi Gyeongbuk KR 730-350
12	40:67:92	Cisco Systems, Inc	MA-L	80 West Tasman Drive San Jose CA US 94568
13	40:98:E1	VusionGroup	MA-L	Kalsdorfer Straße 12 Fernitz-Mellach Steiermark AT 8072
14	40:E7:67	Extreme Networks, Inc.	MA-L	2121 RDU Center Drive Morrisville US 27560
15	50:45:D7	Arista Networks	MA-L	5453 Great America Parkway Santa Clara CA US 95054
16	50:DD:AB	Samsung Electronics Co.,Ltd	MA-L	#94-1, Imsoo-Dong Gumi Gyeongbuk KR 730-350
17	54:05:46	Spintly Inc	MA-L	691 S Milpitas Blvd Suite 217 Milpitas CA US 95035
18	54:59:A8	WUHAN JINGCHEN INTELLIGENT IDENTIFICATION TECHNOLOGY CO.,LTD	MA-L	No. 5, Creative Workshop, Creative World, Yezhihu West Road, HongshanDistrict WUHAN HUBEI CN 530070
19	5C:D1:9C	Fantasia Trading LLC	MA-L	5350 Ontario Mills Pkwy, Suite 100 Ontario CA US 91764
20	68:73:1E	Mega Multimedia AI Inc	MA-L	6565 W Sunset Blvd Ofc 402 Los Angeles CA US 90028-7206
21	68:7D:AC	Samsung Electronics Co.,Ltd	MA-L	#94-1, Imsoo-Dong Gumi Gyeongbuk KR 730-350
22	6C:06:99	Beijing Xiaomi Mobile Software Co., Ltd	MA-L	The Rainbow City Office Building, 68 Qinghe Middle Street Haidian District Beijing Beijing CN 100085
23	74:0C:2E	Cisco Systems, Inc	MA-L	80 West Tasman Drive San Jose CA US 94568
24	7C:0C:F1	Beijing Xiaomi Mobile Software Co., Ltd	MA-L	The Rainbow City Office Building, 68 Qinghe Middle Street Haidian District Beijing Beijing CN 100085
25	7C:86:57	GTWAVE	MA-L	#804-2 Bdong, 723, Pangyo-ro, Bundang-gu, Seongnam-si, Gyeonggi-do Republic of Korea Seongnam Gyeonggi-do KR 13511

What Does It Do?

This MAC Address Lookup tool helps you identify vendor information from any MAC address or Organizationally Unique Identifier (OUI). Enter a MAC address or vendor name to get detailed manufacturer information instantly from the official IEEE database.

IEEE SourceOfficial IEEE database — highest accuracy vendor identification.
All FormatsSupports AA:BB:CC, AA-BB-CC, AABBCC, AA.BB.CC.DD and more.
All BlocksCovers MA-L (OUI), MA-M, MA-S, CID and IAB assignments.

Key Features

Universal Format Support: Any MAC format accepted and auto-normalized.
Vendor Name Search: Find all MAC prefixes for a company e.g. "Cisco", "Apple".
Block Type Details: Precise identification across all IEEE block types.
Daily Database Updates: We refresh the IEEE OUI database every day — you always get the latest vendor registrations.
Downloadable Database: CSV, JSON and XML on the Download page.

What Is a MAC Address?

A MAC (Media Access Control) address is a unique 48-bit hardware identifier permanently assigned to a network interface controller (NIC) by the manufacturer. Every device that connects to a network — whether via Ethernet, Wi-Fi, Bluetooth, or any other interface — has at least one MAC address burned into its hardware. Unlike IP addresses, which can change dynamically, a MAC address is fixed at the hardware level and operates at OSI Layer 2 (the Data Link layer).

MAC Address Structure

Total length: 48 bits — 6 bytes — 12 hexadecimal digits
Common notation: 00:1A:2B:3C:4D:5E or 00-1A-2B-3C-4D-5E
First 3 bytes (OUI): Organizationally Unique Identifier — identifies the manufacturer. Assigned by IEEE.
Last 3 bytes (NIC-specific): Assigned by the manufacturer to uniquely identify each device.
Bit 0 of first byte: If set to 1, it is a multicast address; if 0, it is unicast.
Bit 1 of first byte: If set to 1, it is a locally administered address; if 0, it is globally unique (OUI enforced).

Common MAC Address Formats

00:1A:2B:3C:4D:5E — Colon-separated (most common, used in Linux/Mac)
00-1A-2B-3C-4D-5E — Hyphen-separated (used in Windows)
001A2B3C4D5E — No separator (used in some databases and tools)
001A.2B3C.4D5E — Cisco dot notation
00.1A.2B.3C.4D.5E — Dot-per-byte notation

This tool accepts all of the above formats automatically.

IEEE Block Types (MA-L, MA-M, MA-S, CID, IAB)

MA-L (MAC Address Block Large) — 24-bit OUI prefix, ~16.8 million addresses per block. The classic OUI used by large manufacturers like Cisco, Apple, Samsung. Example: 00-00-0C → Cisco Systems.
MA-M (MAC Address Block Medium) — 28-bit prefix, ~1 million addresses per block. Used by mid-size manufacturers who do not need a full MA-L block.
MA-S (MAC Address Block Small) — 36-bit prefix, 4,096 addresses per block. Ideal for small vendors and IoT device manufacturers. Replaced the older OUI-36 standard.
CID (Company ID) — A 24-bit company identifier that is not globally unique for MAC addresses. Used in specific protocol contexts such as IEEE 802.1 and is not intended for general Ethernet address assignment.
IAB (Individual Address Block) — Legacy block type, inactive since 2014. Provided 4,096 addresses using special IEEE-owned OUIs. Superseded by MA-S. Existing IAB assignments remain valid and are included in this database.

MAC Address Lookup in IT Troubleshooting

MAC address lookups are an essential part of day-to-day network administration and security work. Knowing the vendor behind a MAC address can instantly tell you what type of device is connected to your network, help you identify rogue or unauthorized hardware, and speed up fault diagnosis.

Common IT Use Cases

Unknown device on network: When a new device appears in your DHCP lease table or ARP cache, look up its MAC to confirm whether it belongs to a legitimate vendor (e.g., a Raspberry Pi, a Cisco switch, or an employee's phone) or a suspicious unknown manufacturer.
Network security audits: During a security review, cross-referencing all MAC addresses on a segment against the OUI database helps identify unrecognized or potentially rogue devices before they become a threat.
BYOD policy enforcement: IT teams use MAC lookups to distinguish between company-issued hardware and personal devices attempting to connect to corporate infrastructure.
Wireless troubleshooting: On busy Wi-Fi networks, MAC lookups help identify client device manufacturers to diagnose driver or compatibility issues specific to certain hardware vendors.
IoT device management: With the explosion of IoT devices, quickly identifying the manufacturer of a device via its MAC prefix helps network teams determine firmware update requirements, security patch status, and risk posture.
Forensics and incident response: During a security incident, MAC addresses captured in logs or packet captures can be resolved to manufacturers, helping investigators reconstruct what hardware was present and active on the network.

How to Find a MAC Address on Your Device

Windows: Open Command Prompt → type ipconfig /all → look for "Physical Address".
macOS: System Settings → Network → select interface → Details → Hardware tab.
Linux: Run ip link show or ifconfig in a terminal.
Android: Settings → About phone → Status → Wi-Fi MAC address.
iOS: Settings → General → About → Wi-Fi Address.
Network switch/router: Use show mac address-table (Cisco) or check the ARP table.

Frequently Asked Questions

What is a MAC address lookup?

A MAC address lookup identifies the manufacturer of a network device using its OUI (Organizationally Unique Identifier) prefix. The first 6 characters of any MAC address are registered to a specific company in the official IEEE database. Our tool searches this database instantly and for free.

What MAC address formats are supported?

All common formats are accepted automatically: colon-separated (00:1A:2B:3C:4D:5E), hyphen-separated (00-1A-2B-3C-4D-5E), plain hex (001A2B3C4D5E), Cisco dot notation (001A.2B3C.4D5E), and dot-per-byte (00.1A.2B.3C.4D.5E). You can also search using just the first 3 bytes (OUI prefix only).

Can I search by company or vendor name?

Yes. Simply type a company name such as “Cisco”, “Apple”, “Samsung” or “Raspberry Pi” into the search box. The tool returns all MAC address prefixes registered to that organisation in the IEEE OUI database.

How accurate is the data?

All data is sourced directly from the official IEEE Standards OUI Registry — the authoritative global database for MAC address assignments. We update our database daily to capture new registrations and changes. For legally binding information, always refer to IEEE directly.

How often is the database updated?

We refresh the complete IEEE OUI database every day. This includes all block types: MA-L (classic OUI), MA-M, MA-S, CID and IAB. New vendor registrations and updates from IEEE are reflected within 24 hours.

Can a MAC address lookup identify the exact device?

No. A MAC lookup identifies the manufacturer who registered the OUI prefix — not the specific device model. Additionally, MAC addresses can be spoofed (changed) by software on most modern devices, so results should be used as a diagnostic aid alongside other network tools, not as definitive device identification.

What are MA-L, MA-M, MA-S, CID and IAB?

These are the IEEE block types for MAC address assignments. MA-L (Large) is the classic 24-bit OUI for large manufacturers like Cisco and Apple. MA-M (Medium) uses 28-bit prefixes for mid-size companies. MA-S (Small) uses 36-bit prefixes for small vendors and IoT device makers. CID is a company identifier used for non-Ethernet protocol contexts. IAB is a legacy block type that was replaced by MA-S in 2014.

Can I download the full MAC address database?

Yes. The complete database is available as a free download in CSV, JSON and XML formats. Visit the Download page to get the latest version. Files are updated daily and include all MA-L, MA-M, MA-S, CID and IAB entries.