Sivantos GmbH MAC prefixes: registry identification
Summary
- // what this is
- Sivantos is registered to MAC prefix
20:3A:EFand 1 more in the IEEE OUI database. When a device's MAC address begins with20:3A:EF, that block was registered by Sivantos — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- A prefix match identifies the registry assignment only. Both 24-bit prefixes have clear Group and Local bits; each leaves 24 suffix bits, or 16,777,216 possible values, which is not a device or shipment count.
About this vendor.
A MAC address beginning 20:3A:EF or D4:87:CC matches an IEEE MA-L assignment registered to Sivantos GmbH; the record does not identify a device category or product. The IEEE records list both assignments under the exact legal name and indicate Germany (DE). They do not provide assignment dates in these records.
Each prefix fixes the first 24 bits of a 48-bit MAC address, leaving 24 bits for the suffix. The first-byte Group bit (0x01) and Local bit (0x02) are both clear in 20 and D4. RFC 7042 explains that these bits have distinct MAC-address meanings; changing either bit changes the prefix and no longer matches this exact assignment.
Each prefix has 16,777,216 possible suffix values. That is a mathematical address space, not a count of devices, shipments, observed traffic, or deployed addresses. A captured matching address supports a registry-prefix match only; it cannot establish a specific product, device, current operator, or security state.
- Registry match
20:3A:EFandD4:87:CCare MA-L assignments to Sivantos GmbH [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Device category
- Unknown; the supplied records do not map a device category to either prefix [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Company
- Sivantos GmbH [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Registry
- MA-L [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Country
- Germany (DE) [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Prefixes
20:3A:EFandD4:87:CC[Confirmed] — https://standards-oui.ieee.org/oui/oui.csv- Assignment dates
- Unavailable in these IEEE CSV records [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
- Device category
- Unknown [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
- Product catalog, industry, website, organization status, and related vendors
- Unknown from supplied evidence [Unknown] — https://standards-oui.ieee.org/oui/oui.csv