How much of the MAC address do I need?

The first six hex digits are enough, because that is the part the IEEE assigns. Paste the whole address if you have it: smaller MA-M and MA-S blocks are assigned on 28 and 36 bits, so more digits can resolve to a more specific organisation.

Yes. GET https://notoolkit.com/?mac=AC:DE:48:00:11:22 returns JSON, as does a POST with a JSON body. No API key and no sign-up.

IEEE MA-L, MA-M & MA-S · refreshed daily

MAC Address Vendor Lookup

Q: Why does my phone report no vendor?

Because it is a locally administered address. Phones and laptops randomise their MAC per network for privacy, and a randomised address is not assigned to anyone. The tool reports this rather than saying the vendor is unknown.

Q: Where does the data come from?

The IEEE registration authority, which publishes the MA-L (24-bit), MA-M (28-bit) and MA-S (36-bit) registries. NoToolkit refreshes all three every 24 hours.

NOC Operator Toolkit

Paste a MAC address, or just the front of one, and find out who the block belongs to. Free. No API key. No rate limits (be reasonable).

Live Demo

Look up a MAC address

Any separator, or none. Six hex digits is enough; the whole address is better.

Examples: 00:1A:11 · Google 3C:22:FB · Apple 00:50:56 · VMware B8:27:EB · Raspberry Pi DA:A1:19 · randomised

Enter a MAC address above and click Look up to see the response.

Reference

API Documentation

No authentication required. CORS headers are included on all responses.

GET/?mac={address}

Look up the organisation a MAC address block is assigned to. Accepts a full address or a partial one, with any of the usual separators.

Parameter	Type	Description
mac	string	Six to sixteen hex digits. Separate them however you like — `00:27:22`, `00-27-22`, `00.27.22`, `002722`, or Cisco-style `0027.5858.5849`.

# full address
curl -s "https://notoolkit.com/?mac=AC:DE:48:00:11:22" | jq .

# just the OUI
curl -s "https://notoolkit.com/?mac=B8:27:EB" | jq .

# any separator works, including Cisco's dotted groups
curl -s "https://notoolkit.com/?mac=0027.5858.5849" | jq .

POST/

The same lookup with a JSON body.

curl -s -X POST https://notoolkit.com/ \
  -H 'Content-Type: application/json' \
  -d '{"mac":"AC:DE:48:00:11:22"}' | jq .

GETResponse fields

Field	Description
mac	The address as you sent it, normalised.
assignment	The block that matched, with its size when it is not a 24-bit OUI.
registry	`MA-L`, `MA-M` or `MA-S` — the IEEE registry holding it.
org_name	The organisation the block is assigned to.
org_address	The postal address on the registration, where IEEE publishes one.
locally_administered	`true` for a randomised or hand-set address, which belongs to nobody.
multicast	`true` when the low bit of the first octet is set.
note	A sentence of context when there is something worth saying.

Notes

About this data

How much of the address do I need?

Six hex digits, since that is what the IEEE assigns. Give the whole address when you have it: the smaller MA-M and MA-S blocks are assigned on 28 and 36 bits, so the extra digits can resolve to a more specific organisation than the 24-bit block would.

Why does my phone show no vendor?

Because it is a locally administered address. Phones and laptops randomise their MAC per network for privacy, and a randomised address is not assigned to anyone. You can spot one without a lookup: the second hex digit is 2, 6, A or E.

Where does the data come from?

The IEEE registration authority, which publishes the MA-L, MA-M and MA-S registries. NoToolkit re-imports all three every 24 hours, and drops assignments the IEEE has withdrawn.