- Prefix
- 20:5F:3D 20-5F-3D 205F.3D
- Block type
- MA-L (16,777,216 addresses)
- Address range
- 20:5F:3D:00:00:00 – 20:5F:3D:FF:FF:FF
- Organization
- Adtran Inc
- Registered address
- Victory House, Vision Park, Chivers Way, Histon, Cambridge CB24 9ZR, GB
- Country
- United Kingdom (GB)
- Address bits
- Unicast (I/G bit 0), globally unique (U/L bit 0)
Look up 20:5F:3D:00:00:00
Adtran Inc holds 11 blocks in total: see all. Source: IEEE Registration Authority public listing.