Annapurna Labs — 5 MA-L + 148 MA-M prefixes

A MAC address beginning with a prefix registered to Annapurna Labs identifies networking or compute hardware built by Annapurna Labs, the Amazon-owned semiconductor design house behind AWS's Nitro system — the custom cards that handle networking, storage, and security virtualization for EC2 instances.

The IEEE registry shows real corporate substance rather than a bare single-OUI shell: Annapurna Labs holds 5 MA-L (24-bit OUI) blocks and 148 MA-M (28-bit) blocks, all registered under the identical org name and Haifa, Israel address. No MA-S (36-bit) blocks were found. This breadth of allocation is typical of a vendor shipping high volumes of embedded networking silicon.

Annapurna Labs was founded in Israel in 2011 and acquired by Amazon in January 2015; it now operates as AWS's custom-silicon division, headquartered in Haifa with additional engineering sites in Tel Aviv, Austin, and Seattle. Its flagship output is the Nitro system: Nitro Cards, the Nitro Security Chip, and the Nitro Hypervisor, which underpin VPC networking, EBS storage, and local NVMe on essentially every AWS server built since 2015.

Because Nitro hardware forms a hardware-enforced isolation boundary inside AWS's own fleet, a MAC resolving to Annapurna Labs is far more likely to represent AWS-internal Nitro networking hardware than a device an end user would encounter on a home or enterprise LAN. No public source maps a specific MAC prefix to a named Nitro card generation, so that finer-grained mapping stays Unknown.

IEEE assignment

5 MA-L blocks + 148 MA-M blocks → "Annapurna labs", registered Haifa, IL [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry

Registry / block detail

MA-L OUIs 50:62:45, 18:96:77, 30:8B:23, 28:87:5F, F8:F2:95; MA-M sample D0:93:95, E0:38:2D, D0:96:86, D4:20:00, C4:83:72 (first 5 of 148) [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry

HQ / country

Matam Scientific Industries Center, Building 8.2, Haifa IL 3508409 (registry address; matches public HQ) [Confirmed] — the IEEE MA-M registry; https://en.wikipedia.org/wiki/Annapurna_Labs

Company status

active, operating as AWS's custom-silicon division [Confirmed] — https://en.wikipedia.org/wiki/Annapurna_Labs, http://www.annapurnalabs.com/

Device types

Nitro Cards, Nitro Security Chip, Nitro Hypervisor (AWS EC2 networking/storage/NVMe) [Likely] — https://aws.amazon.com/ec2/nitro/

Notable products

AWS Nitro system (7 chip generations, 10 Gbps–1,600 Gbps) [Likely] — https://siliconangle.com/2024/11/27/amazons-secretive-ai-weapon-exclusive-look-inside-aws-annapurna-labs-chip-operation/

Registration date

not applicable — IEEE OUI/MAM data carries no date field; no date attributed [Confirmed]

Security context

Nitro's hardware isolation boundary makes an Annapurna-Labs MAC unlikely to indicate a rogue device on a home/enterprise LAN; it almost certainly indicates AWS-fleet-internal hardware [Likely] — https://docs.aws.amazon.com/whitepapers/latest/security-design-of-aws-nitro-system/the-components-of-the-nitro-system.html

Related vendors

none independently verified; parent is Amazon.com, Inc. [Confirmed] — https://en.wikipedia.org/wiki/Annapurna_Labs

Analyst note

strong company substance (153 total OUI/MAM blocks, well-documented Amazon/AWS acquisition, active product line) clears the single-OUI-shell bar; per-prefix-to-card-model mapping is not independently confirmed.