Performance Analysis Broadband, Spirent plc — 2 prefixes (MA-L)

"Performance Analysis Broadband" is the registry business-unit name under which Spirent plc holds two IEEE MA-L OUI blocks — 00:10:94 and 00:60:F3 — both registered to the identical organization string and the identical address, 27349 Agoura Road, Calabasas Hills, CA, US. This business unit traces to Netcom Systems of Calabasas/Chatsworth, California, which Spirent (then part of the Bowthorpe plc consolidation) acquired in 1999 to form the network test-and-measurement line now known as Spirent Communications. The "Performance Analysis Broadband" name corresponds to the SmartBits family of chassis-based network performance test systems — SmartBits 600/6000C and the AX4000 Broadband Test System — traffic generators and analyzers used by equipment makers, carriers, and test labs for RFC 2544 benchmarking and broadband-access simulation, not consumer or IoT hardware. MAC addresses from these two OUIs therefore appear on lab test-chassis Ethernet load modules rather than in ordinary operational traffic. Two registry notes matter for anyone mapping this vendor. First, a THIRD Spirent block, 00:10:5E ("Spirent plc, Service Assurance Broadband," 5280 Corporate Dr, Ballenger Creek, MD), is a distinct registry row under a different name and address and is NOT one of this vendor's assignments — do not conflate it. Second, IEEE publishes no registration date for any of these blocks, and third-party lookup tools (maclookup.app, hwaddress.com) show no "date registered" field for 00:10:94, so no assignment date is recorded here. Spirent plc itself was a publicly-traded network-test company until its 2025 acquisition by Keysight Technologies.

IEEE assignment

2 prefixes → "Performance Analysis Broadband, Spirent plc", registered Calabasas Hills, CA, US [Confirmed] — IEEE MA-L (:37753)

Registry / block size

MA-L (24-bit OUI); holds 2 IEEE prefixes (00:10:94, 00:60:F3) [Confirmed] — IEEE MA-L (:37753). NOTE: IEEE publishes NO assignment/registration date for OUI/MA-L entries (the IEEE MA-L registry is Registry, Assignment, Organization Name, Organization Address only); any "date registered" on a third-party tool is a database artifact, not an IEEE fact.

HQ / country

27349 Agoura Road, Calabasas Hills, CA, US 91301 (registry address for both blocks) [Confirmed] — IEEE MA-L (:37753)

Company status

Spirent plc active as a brand; acquired by Keysight Technologies in 2025 (delisted as an independent public company) [Confirmed] — keysight.com news release, en.wikipedia.org/wiki/Spirent

Corporate history

business unit originates with Netcom Systems (Calabasas/Chatsworth, CA), acquired 1999 into the Spirent Communications test-and-measurement line [Likely] — en.wikipedia.org/wiki/Spirent, eetimes.com

Device types

network/broadband test-and-measurement lab equipment — chassis-based traffic generators/analyzers, not consumer or IoT devices [Likely] — Spirent support-KB, testworld.com AX4000 listing

Notable products

SmartBits 600 / SmartBits 6000C, AX4000 Broadband Test System [Likely] — support-kb.spirent.com, testworld.com, accusrc.com SMB-600 datasheet

Verified sample prefixes (both MA-L, same org)

00:10:94, 00:60:F3 [Confirmed] — IEEE MA-L (:37753)

Registration date

Unknown — IEEE publishes none; third-party lookups (maclookup.app, hwaddress.com) show no date field for 00:10:94 [Confirmed as absent] — maclookup.app, hwaddress.com

Distinct related entry (do NOT conflate)

00:10:5E "Spirent plc, Service Assurance Broadband", 5280 Corporate Dr, Ballenger Creek, MD, US 21703 — different name and address, separate registry row [Confirmed] — IEEE MA-L

Security / abuse context

no CVE, malware, or abuse-database association found or expected — lab test equipment in controlled environments, not internet-facing hardware [Likely] — no hits found in this pass

Analyst note

A globally-administered OUI from 00:10:94 or 00:60:F3 identifies Spirent SmartBits/AX4000-class test-lab hardware; these MACs are unlikely to appear in normal end-user or enterprise operational traffic.