MAC address 8C:20:F1 (OpenAI)

MAC address prefix 8C:20:F1 is registered to OpenAI, located at 1455 3rd Street, San Francisco CA 94158, US. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was registered on 26 May 2026, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation

Assigned Prefix

8C:20:F1

Registrant / Organization

OpenAI

Registry Chronology

Initial registration: 26 May 2026

Assignment Classification

MA-L

(MAC Address Block Large) containing 16,777,216 MAC addresses (2^24)

Registered Location

Country: United States (US)

Headquarters Registered Facility 🇺🇸 US

1455 3rd Street
San Francisco CA 94158
US.

REST API v2

200 OK

CLI curl -s https://api.maclookup.app/v2/macs/8c20f1 -H 'Accept: application/json'

{
  "success": true,
  "found": true,
  "macPrefix": "8C20F1",
  "company": "OpenAI",
  "address": "1455 3rd Street, San Francisco CA 94158, US",
  "country": "US",
  "blockStart": "8C20F1000000",
  "blockEnd": "8C20F1FFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2026-05-26",
  "isRand": false,
  "isPrivate": false
}