SMC Corporation — 2 prefixes (MA-L)

A MAC address beginning 00:23:C6 or 84:9D:64 belongs to SMC Corporation, the Tokyo-based pneumatics and industrial-automation manufacturer (TYO: 6273) — not SMC Networks, Inc. or SMC MASSACHUSETTS, INC., which are separate registrants holding their own OUI blocks under different vendor entries on this site.

Both prefixes trace to the same registered address, 4-2-2 Kinunodai, Tsukuba, Ibaraki 300-2493, Japan, and both are IEEE MA-L (48-bit) assignments. SMC Corporation is a large, well-documented public company: founded 1959, roughly 20,853 employees, factories in 28 countries, and a member of the TOPIX Large-70 index.

The device context supports the identification. SMC sells fieldbus-connected pneumatic valve-manifold controllers — the EX260 and EX600 series — with EtherNet/IP, EtherCAT, PROFINET, PROFIBUS DP, DeviceNet, and CC-Link connectivity, IP67-rated for factory-floor deployment. SMC Corporation is also a registered vendor in ODVA's EtherNet/IP conformance marketplace, corroborating the network-hardware use of these OUIs.

No CISA ICS-CERT advisory naming SMC Corporation pneumatic or fieldbus products, and no specific Shodan-exposure record for SMC valve-controller units, was found — that is an absence of findings, not a confirmed clean bill of health.

IEEE assignment

2 prefixes → SMC Corporation, registered Tsukuba, Ibaraki, JP [Confirmed] — IEEE MA-L

Registry / block size

MA-L (24-bit OUI); 2 IEEE prefixes for this registrant [Confirmed] — the IEEE MA-L registry, cross-checked maclookup.app/vendors/smc-corporation

HQ / country

4-2-2 Kinunodai, Tsukuba, Ibaraki 300-2493, JP (registry address); SMC Corporation is headquartered in Tokyo, JP [Confirmed] — IEEE MA-L, en.wikipedia.org/wiki/SMC_Corporation

Company status

active, publicly traded (TYO: 6273), founded 1959, ~20,853 employees, factories in 28 countries [Confirmed] — en.wikipedia.org/wiki/SMC_Corporation

Device types

pneumatic/fieldbus valve-manifold controllers (EX260, EX600 series) with EtherNet/IP, EtherCAT, PROFINET, PROFIBUS DP, DeviceNet, CC-Link connectivity, IP67-rated [Confirmed] — smcusa.com/industrial-communication, smcworld.com

Notable products

EX260, EX600 series fieldbus-connected valve manifold controllers [Confirmed] — smcworld.com (EX260-EN datasheet)

Verified prefixes (both MA-L, SMC Corporation)

00:23:C6, 84:9D:64 [Confirmed] — the IEEE MA-L registry; maclookup.app/vendors/smc-corporation

Registration dates

Unknown — IEEE publishes no assignment/registration date for OUI/MAC prefix allocations; maclookup.app displays "registered 2008-10-25" (00:23:C6) and "registered 2016-04-01" (84:9D:64), but these are third-party database-scrape artifacts, not IEEE facts

[Confirmed caveat] — maclookup.app/vendors/smc-corporation

Security context

Unknown — no CISA ICS-CERT advisory or specific published Shodan-exposure record naming SMC Corporation pneumatic/fieldbus products was located [Unknown] — cisa.gov/news-events/ics-advisories

Related vendors

SMC Networks, Inc. (separate registrant, separate OUI block, distinct vendor entry) [Confirmed]; SMC MASSACHUSETTS, INC. (separate registrant, separate OUI block, distinct vendor entry) [Confirmed] — the IEEE MA-L registry

Analyst note

The name "SMC" covers at least three unrelated corporate OUI registrants (this Japan-based industrial-automation manufacturer, a US networking-equipment company, and a Massachusetts entity) — identify by exact prefix, never by name alone.