ADVA Optical Networking Ltd. holds seven MA-L (24-bit OUI) blocks in the IEEE registry, all carrying the registry address ADVAntage House, York, GB YO30 4RY, United Kingdom. ADVA is a carrier-class optical transport vendor founded in 1994, historically headquartered in Martinsried, Upper Bavaria, Germany; its hardware spans the FSP 3000 multi-layer optical transport chassis (DWDM/OTN/Ethernet), the FSP 150 carrier-Ethernet access and demarcation appliances, and timing/synchronization equipment sold to telecom operators, government and education networks, and enterprises — rack-mounted infrastructure, not consumer or IoT gear. The corporate picture changed materially in the 2020s: ADVA merged with ADTRAN Holdings on 2022-07-15, and following shareholder approval at the 2023 AGM the subsidiary was rebranded Adtran Networks, with the historical adva.com domain now redirecting to adtran.com. Separately, ADVA spun out a dedicated layer-1 encryption subsidiary, Adva Network Security (Berlin), in October 2022. The practical takeaway for OUI work: an ADVA-registered prefix on a globally-administered address reliably identifies professional optical/Ethernet transport hardware, but the registered name still reads "ADVA Optical Networking Ltd." even though the operating entity is now Adtran Networks. A standard caveat applies to dates — IEEE publishes no OUI registration dates, so any "date registered" value (e.g. a 1998 figure for 00:80:EA on third-party lookup tools) is a database artifact, not an IEEE fact.
- IEEE assignment
- 7 prefixes → ADVA Optical Networking Ltd. [Confirmed] — IEEE MA-L (oui.csv registry cache)
- Registry / block size
- MA-L (24-bit OUI); 7 IEEE prefixes; no MA-M or MA-S blocks for this vendor [Confirmed] — IEEE oui.csv / mam.csv / oui36.csv caches. NOTE: IEEE's public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools is a database artifact, not an IEEE fact.
- HQ / country
- ADVAntage House, York, GB YO30 4RY, United Kingdom (registry address, consistent across all 7 rows) [Confirmed] — IEEE oui.csv cache. Historical corporate HQ at time of registrations: Martinsried, Upper Bavaria, Germany [Confirmed] — en.wikipedia.org/wiki/ADVA_Optical_Networking
- Company status
- active; now operating as Adtran Networks after merging into ADTRAN Holdings (2022-07-15) and rebranding (2023 AGM) [Confirmed] — adtran.com press release 20220715; fibre-systems.com rebrand report
- Current legal name
- Adtran Networks (formerly ADVA Optical Networking SE); registry still lists "ADVA Optical Networking Ltd." [Confirmed] — adtran.com; fibre-systems.com
- Founded
- 1994 [Confirmed] — en.wikipedia.org/wiki/ADVA_Optical_Networking
- Device types
- carrier-class optical transport and Ethernet access hardware — FSP 3000 (DWDM/OTN/Ethernet multi-layer transport chassis), FSP 150 (carrier-Ethernet access/demarcation appliances), timing/synchronization hardware, data-center interconnect [Confirmed] — lightwaveonline.com (FSP 3000); globenewswire.com 2016 (FSP 150); en.wikipedia.org
- Verified prefixes (all MA-L, ADVA Optical Networking Ltd.)
- 00:0B:90, 00:80:EA, 00:D0:8B, 18:BC:57, 28:9A:F7, 84:C8:07, B8:38:EF [Confirmed] — IEEE oui.csv cache / maclookup.app
- Security context
- no ADVA-specific CVEs found in this pass (NVD search redirect prevented direct retrieval — treat as "not found," not confirmed-clean). FSP 3000/FSP 150 are managed-infrastructure gear sold to carriers/enterprises, not typically internet-facing; ADVA spun out Adva Network Security (Berlin, Oct 2022) for layer-1 encryption (ConnectGuard on FSP 150-XG118Pro) [Likely] — businesswire.com 20221003; en.wikipedia.org/wiki/Adva_Network_Security
- Notable acquisitions by ADVA
- Oscilloquartz (2014, timing/sync), Overture Networks (2016, SDN/NFV), MRV Communications (2017, optical) [Confirmed] — en.wikipedia.org/wiki/ADVA_Optical_Networking
- Related vendors
- Adtran Networks (current operating name / parent ADTRAN Holdings), Adva Network Security (security subsidiary)
- Analyst note
- an ADVA-registered OUI on a globally-administered address identifies professional carrier optical/Ethernet transport hardware. The registry name lags the corporate reality (now Adtran Networks). Do not surface any third-party "registration date" as an IEEE fact.