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MAC prefix 00:01:5B

Assigned by the IEEE to ITALTEL S.p.A/RF-UP-I.

Prefix
00:01:5B   00-01-5B   0001.5B
Block type
MA-L (16,777,216 addresses)
Address range
00:01:5B:00:00:00 – 00:01:5B:FF:FF:FF
Organization
ITALTEL S.p.A/RF-UP-I
Registered address
20019 Cast.Settimo M.se (MI)
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 00:01:5B:00:00:00

ITALTEL S.p.A/RF-UP-I holds 2 blocks in total: see all. Source: IEEE Registration Authority public listing.