MAC address 38:B1:4E:5 (Brookhaven National Laboratory)

MAC address prefix 38:B1:4E:5 is registered to Brookhaven National Laboratory, located at 741 Brookhaven Ave, Upton NY 11973, US. This registration is classified as MA-M (MAC Address Block Medium) containing 1,048,576 MAC addresses (2^20). The prefix was registered on 09 March 2026, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation
Assigned Prefix
38:B1:4E:5
Registrant / Organization
Brookhaven National Laboratory
Registry Chronology
Initial registration: 09 March 2026
Assignment Classification
MA-M

(MAC Address Block Medium) containing 1,048,576 MAC addresses (2^20)

Registered Location

MAC Address Vendor Country United States (US) map
Country: United States (US)
Headquarters Registered Facility 🇺🇸 US
741 Brookhaven Ave
Upton NY 11973
US.

REST API v2

200 OK
CLI curl -s https://api.maclookup.app/v2/macs/38b14e5 -H 'Accept: application/json'
{
  "success": true,
  "found": true,
  "macPrefix": "38B14E5",
  "company": "Brookhaven National Laboratory",
  "address": "741 Brookhaven Ave, Upton NY 11973, US",
  "country": "US",
  "blockStart": "38B14E500000",
  "blockEnd": "38B14E5FFFFF",
  "blockSize": 1048575,
  "blockType": "MA-M",
  "updated": "2026-03-09",
  "isRand": false,
  "isPrivate": false
}