Every MAC/OUI block IEEE has registered to this exact organization name, combined.
Registered nameRohde&Schwarz Topex SA
Total assignments22
Total address capacity1,134,592
First tracked hereAug 22, 2026
Last changed hereAug 22, 2026
SourceIEEE Registration Authority
Vendor registration identifies the organization holding a block, not a specific device model, product line, or manufacturing date. This page combines every block IEEE has registered under this exact organization name; it doesn't mean every address in every listed block is currently shipping in a real device.
Assignments by type
| Type | Count |
|---|---|
| MA-M | 1 |
| MA-S | 5 |
| IAB | 16 |
Countries in IEEE's registration records
| Country | Blocks |
|---|---|
| 🇷🇴 Romania | 22 |
Download this organization's blocks
Get just these assignments as CSV or JSON, generated fresh from the live registry on every request.
22 registered prefixes
Prefix
Type
DC:44:27:D0:00:00 /28
MA-M
00:50:C2:40:30:00 /36
IAB
00:50:C2:85:50:00 /36
IAB
00:50:C2:92:A0:00 /36
IAB
00:50:C2:9E:C0:00 /36
IAB
00:50:C2:BF:A0:00 /36
IAB
00:50:C2:C9:E0:00 /36
IAB
00:50:C2:D4:70:00 /36
IAB
00:50:C2:DD:30:00 /36
IAB
00:50:C2:E2:A0:00 /36
IAB
00:50:C2:E4:B0:00 /36
IAB
00:50:C2:EA:D0:00 /36
IAB
00:50:C2:EE:40:00 /36
IAB
00:50:C2:F5:20:00 /36
IAB
00:50:C2:FC:00:00 /36
IAB
40:D8:55:06:C0:00 /36
IAB
40:D8:55:19:A0:00 /36
IAB
70:B3:D5:18:60:00 /36
MA-S
70:B3:D5:24:30:00 /36
MA-S
70:B3:D5:29:60:00 /36
MA-S
70:B3:D5:93:20:00 /36
MA-S
70:B3:D5:FB:00:00 /36
MA-S
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