Agere Systems — 2 prefixes (MA-L)

Agere Systems Inc. holds two full MA-L (24-bit OUI) blocks: 00:02:2D, carrying a Netherlands registry address (P.O. Box 755, NL), and 00:05:3D, carrying 1371 McCarthy Blvd., Milpitas, CA, US. The company was a substantial semiconductor maker, not a bare single-OUI shell — incorporated August 1, 2000 as a Lucent Technologies subsidiary (Lucent itself an AT&T/Bell Labs spinoff), fully spun off as an independent public company June 1, 2002, and headquartered in Allentown, PA with roughly 16,500–17,000 employees and about $4.7B revenue at formation. Its best-corroborated products are dial-up softmodem ("WinModem") chipsets — the Agere L56xL "Luna," SV92P, and PCI-SV92EX — alongside Ethernet, IEEE-1394 (FireWire), VoIP, and storage silicon; the company's USB vendor ID 047E is registered to "Agere Systems, Inc. (Lucent)." Agere merged into LSI Corporation on April 2, 2007, and LSI was later acquired by Avago (2014), which adopted the Broadcom name in 2016 — so the corporate lineage runs Lucent → Agere → LSI → Avago/Broadcom. One live caveat worth flagging: the Windows kernel-mode "Agere Modem" driver (ltmdm64.sys, the LSI/Broadcom/Agere PCI-SV92EX soft-modem driver) carries multiple recent CVEs, and Microsoft removed it from Windows entirely in the October 2025 cumulative update. Those CVEs concern the Windows driver package, not the Ethernet NIC MAC prefix — the OUI corroborates hardware vendor identity but is not itself the vulnerable component.

IEEE assignment

2 prefixes → Agere Systems, MA-L blocks 00:02:2D (Netherlands registry address) and 00:05:3D (Milpitas, CA, US) [Confirmed] — IEEE MA-L (lines 5861, 29413)

Registry / block size

MA-L (24-bit OUI); holds 2 IEEE prefixes (~16.7M addresses each) [Confirmed] — the IEEE MA-L registry. No MA-M match in the IEEE MA-M registry and no MA-S match in the IEEE MA-S registry (the only "Ager" substring hits in the IEEE MA-M registry are unrelated "HagerEnergy GmbH" rows). NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools (e.g. maclookup.app's "09 November 2000" for 00:02:2D) is a database artifact, not an IEEE fact.

Registry addresses

00:02:2D → P.O. Box 755, NL (Netherlands); 00:05:3D → 1371 McCarthy Blvd., Milpitas, CA 95035, US [Confirmed] — IEEE MA-L

HQ / country

Allentown, PA, US (corporate HQ at formation); registry addresses span NL and US [Confirmed] — https://en.wikipedia.org/wiki/Agere_Systems

Company status

defunct — merged into LSI Corporation April 2, 2007; lineage Lucent → Agere → LSI → Avago/Broadcom [Confirmed] — https://en.wikipedia.org/wiki/Agere_Systems, https://www.sec.gov/Archives/edgar/data/0001129446/000134100407001045/ex99-1.htm

Corporate history

incorporated Aug 1, 2000 as a Lucent subsidiary; independent public spinoff June 1, 2002; ~16,500–17,000 employees and ~$4.7B revenue at formation [Confirmed] — https://en.wikipedia.org/wiki/Agere_Systems, https://www.fundinguniverse.com/company-histories/agere-systems-inc-history/

Device types

dial-up softmodem/WinModem chipsets, Ethernet controllers, IEEE-1394 (FireWire) chips, VoIP silicon, ASIC/storage semiconductors [Likely for Ethernet/1394/VoIP/storage — named in company-history sources with thinner device-level corroboration; Confirmed for modem chipsets] — https://en.wikipedia.org/wiki/Agere_Systems

Notable products

Agere L56xL "Luna" softmodem chipset, SV92P, PCI-SV92EX [Confirmed] — http://xmodem.org/chipsets/agere/agere_L56xL.html, http://www.modemsite.com/56k/sv92p.asp

USB vendor ID

047E → "Agere Systems, Inc. (Lucent)" [Confirmed] — https://devicehunt.com/view/type/usb/vendor/047E

Website

http://www.agere.com — historical corporate site, defunct/redirected post-2007 merger; current live status not re-verified [Unknown] — https://www.sec.gov/Archives/edgar/data/0001129446/000134100407001045/ex99-1.htm

Security context

the Windows kernel-mode "Agere Modem" driver (ltmdm64.sys, LSI/Broadcom/Agere PCI-SV92EX soft-modem) has multiple recent CVEs — CVE-2023-31096 (local EoP), CVE-2025-24052 (stack buffer overflow, CVSS 7.8), CVE-2025-24990 (untrusted pointer dereference, CVSS 7.8, actively exploited / CISA KEV per secondary reporting); Microsoft removed ltmdm64.sys from Windows in the Oct 2025 cumulative update. The CVEs concern the Windows driver package, NOT the Ethernet NIC MAC prefix — the OUI corroborates hardware vendor identity, not the vulnerable component. [Confirmed] — https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-24990, https://gbhackers.com/windows-agere-modem-driver-0-day-exploited/

IANA Reference

not applicable to OUI/MAC vendor entries (that field applies only to port/protocol and RIR autnum records); left blank, not fabricated [Confirmed]

Related vendors

LSI Corporation (2007 acquirer), Avago/Broadcom (later lineage), Lucent Technologies (parent at formation)

Analyst note

An Agere OUI on a globally-administered address identifies genuine Agere/Lucent-lineage hardware. Because the company is defunct (2007), such hardware is legacy; the actively-exploited ltmdm64.sys CVEs are a modem-driver software risk, distinct from the Ethernet OUI itself.