Palo Alto Networks holds 40 MA-L blocks registered to "Palo Alto Networks," an unusually large footprint for a security vendor and a strong signal of how widely the company embeds MAC addresses across its physical appliance line. Founded March 1, 2005 and headquartered in Santa Clara, California, the company is a major cybersecurity firm whose hardware is dedicated network-security gear — next-generation firewalls (NGFWs) and intrusion-prevention systems deployed at data-center perimeters, internet gateways, campus edges, and branch offices. Its appliance families span the PA-400 Series (branch/small office), the ruggedized PA-400R, the PA-1400, PA-3400, PA-5400/5450, PA-5500, and the high-performance PA-7500 Series for large data centers, alongside the VM-Series and CN-Series virtual and container firewalls. The practical interpretation for asset classification is sharper than for a consumer-electronics maker: because these OUIs map exclusively to security appliances rather than general-purpose hosts, printers, or consumer gear, a globally-administered Palo Alto Networks OUI on a network reliably indicates a dedicated firewall or IPS — not a workstation, phone, or IoT endpoint. The registry address on 39 of the 40 assignments is the canonical 3000 Tannery Way, Santa Clara; one earlier block (24:0B:0A) carries the older 4401 Great America Parkway address, a normal artifact of a relocated registrant. As with every OUI entry, IEEE publishes no registration dates, so any "date registered" value seen on third-party lookup tools is a database artifact and must not be cited as an IEEE fact.
- IEEE assignment
- 40 prefixes → Palo Alto Networks, registered Santa Clara, CA, US [Confirmed] — IEEE MA-L (oui.csv cached at enrichment/registries/oui.csv)
- Registry / block size
- MA-L (24-bit OUI); holds 40 IEEE prefixes (~16.7M addresses each). No MA-M (OUI-36) or MA-S (IAB) blocks found. [Confirmed] — IEEE MA-L (oui.csv; absent from mam.csv and oui36.csv). NOTE: IEEE's public OUI data publishes NO assignment/registration date (oui.csv columns are only Registry, Assignment, Organization Name, Organization Address); any "date registered" on third-party tools is a database artifact, not an IEEE fact.
- HQ / country
- 3000 Tannery Way, Santa Clara, CA 95054, US (registry address on 39 of 40 assignments) [Confirmed] — IEEE MA-L. One earlier assignment (24:0B:0A) lists 4401 Great America Parkway, Santa Clara, CA 95054, US — a former-address artifact. [Confirmed] — IEEE MA-L
- Company status
- active [Confirmed] — paloaltonetworks.com
- Founded
- March 1, 2005 [Confirmed] — en.wikipedia.org/wiki/Palo_Alto_Networks
- Device types
- Next-Generation Firewall (NGFW) hardware appliances — PA-400 Series, PA-400R (ruggedized), PA-500 Series, PA-1400 Series, PA-3400 Series, PA-5400/PA-5450 Series, PA-5500 Series, PA-7500 Series; plus VM-Series and CN-Series virtual/container firewalls [Confirmed] — paloaltonetworks.com/network-security/next-generation-firewall-hardware
- Notable products
- PAN-OS-based NGFW appliances; Unit 42 threat-intelligence division (company-level, not a hardware line)
- Verified sample prefixes (all MA-L, Palo Alto Networks)
- 60:15:2B, 00:86:9C, D4:F4:BE, 24:0B:0A, 00:1B:17 [Confirmed] — IEEE MA-L (oui.csv)
- Prefix count detail
- 40 MA-L blocks in the cached IEEE registry. Third-party aggregators corroborate 40 blocks; the earliest block traceable in those databases is 00:1B:17 (database artifact date 2007-01-16) and the most recent is D0:55:33 (database artifact date 2026-05-19) — both dates are database artifacts, NOT IEEE publication dates. [Likely] — maclookup.app/vendors/palo-alto-networks
- IANA reference
- none — OUI/MAC vendor assignments are an IEEE function, separate from IANA; no IANA RFC reference is applicable and none should be populated. [Confirmed] — IEEE registry scope
- Related vendors
- none identified (no separate subsidiary OUI registrations found)
- Analyst note
- A globally-administered Palo Alto Networks OUI almost always identifies a dedicated network-security appliance (firewall/IPS), not a general-purpose host — a useful, high-specificity signal for asset inventory. Because the vendor ships appliances rather than client devices, MAC randomization is not a concern here the way it is for consumer-mobile vendors.