Aditec GmbH — 3 MA-S prefixes (German process-controller maker)

A MAC address starting with 8C:1F:64:79:3, 70:B3:D5:A3:8, or 70:B3:D5:3C:E belongs to Aditec GmbH (Aditec Industrieelektronik GmbH), a privately held industrial-electronics manufacturer in Offenau, Baden-Württemberg, Germany. These blocks typically appear on Aditec's network-capable process controllers for food technology — bakery, butchery, kettle-cooking, smoking, and refrigeration equipment.

Aditec holds three separate 36-bit (MA-S) IEEE assignments rather than one 24-bit OUI. Two of them, 70:B3:D5:A3:8 and 70:B3:D5:3C:E, sit under the shared /24 base 70:B3:D5, which the IEEE Registration Authority itself administers and sub-delegates to thousands of unrelated registrants — a MAC merely starting 70:B3:D5 cannot be attributed to Aditec without checking the specific 36-bit slice.

Aditec's own site documents the hardware behind these assignments: the MIC 900 touchscreen process controller (LAN, USB, CAN), the MKA 120 programmable controller with an optional Ethernet/LAN board, and the MS120/MS220/MIC3000 family, plus a VisuNet application for remote monitoring over the network. No CVE or security advisory tied to Aditec controllers turned up in an August 2026 search.

A separate, unrelated company also uses the "Aditec" name: ADITEC CO. LTD of Seoul, South Korea, which holds one MA-L (24-bit) block, 00:14:5F. No affiliation between the two firms is evident, and beyond the bare IEEE listing no corroborating website, product literature, or device context was found for the Korean registrant — it does not meet the bar for a substantive vendor page on its own.

Vendor

Aditec GmbH (Aditec Industrieelektronik GmbH), Offenau, Baden-Württemberg, Germany [Confirmed] — the IEEE MA-S registry

Registry blocks

MA-S (36-bit) — 8C:1F:64:79:3, 70:B3:D5:A3:8, 70:B3:D5:3C:E [Confirmed] — the IEEE MA-S registry

Notable products

MIC 900, MKA 120, MS120/MS220/MIC3000, VisuNet remote-monitoring app [Confirmed] — aditec.net, radwell.com

Shared-base caveat

70:B3:D5 and 8C:1F:64 are IEEE-RA shared bases sub-delegated to thousands of unrelated registrants; Aditec owns only its named 36-bit slices, not either base [Confirmed] — the IEEE MA-S registry

Unrelated namesake

ADITEC CO. LTD, Seoul, South Korea holds a separate MA-L block 00:14:5F with no found affiliation or corroborating substance [Confirmed] — the IEEE MA-L registry

IEEE assignment

Aditec GmbH — MA-S (36-bit), 3 blocks: 8C:1F:64:79:3, 70:B3:D5:A3:8, 70:B3:D5:3C:E, registered Offenau, Baden-Württemberg, DE [Confirmed] — the IEEE MA-S registry

Registry / block size

MA-S (36-bit OUI extension); each block covers 4,096 addresses (12 host bits) [Confirmed] — the IEEE MA-S registry

HQ / country

Talweg 17, Offenau, Baden-Württemberg, DE 74254 [Confirmed] — the IEEE MA-S registry, corroborated by firmeneintrag.creditreform.de

Company status

active — aditec.net is a live corporate site documenting current products [Confirmed] — https://www.aditec.net/home-en

Device types

industrial process controllers for food technology (bakery, butchery, kettle cooking, smoking, refrigeration) [Confirmed] — aditec.net

Notable products

MIC 900, MKA 120, MS120, MS220, MIC3000, VisuNet [Confirmed] — aditec.net, radwell.com, aditec.pl MKA120 datasheet

Founding

third-party business directories place founding in the early-to-mid 1980s [Likely] — company-directory listings (yumda.com, kompass.com); not an IEEE fact and not a MAC-registration date

Verified sample prefixes (all MA-S, Aditec GmbH)

8C:1F:64:79:3, 70:B3:D5:A3:8, 70:B3:D5:3C:E [Confirmed] — the IEEE MA-S registry

Shared-base caveat

70:B3:D5 and 8C:1F:64 are IEEE-RA-administered shared /24 bases sub-delegated to many unrelated registrants (70:B3:D5 alone carries 4,092 registrants); Aditec GmbH owns only its named 36-bit slices, not either base [Confirmed] — the IEEE MA-S registry

Unrelated namesake

ADITEC CO. LTD, Seoul, South Korea — separate company, MA-L (24-bit) block 00:14:5F; no affiliation with Aditec GmbH found; no corroborating website, product literature, or device context beyond the bare IEEE listing [Confirmed] — the IEEE MA-L registry

Security history

no CVE or security advisory found for Aditec controllers, as of an August 2026 search [Confirmed]

Related vendors

none found

Analyst note

identify a device by the specific 36-bit slice, not by the shared 70:B3:D5 or 8C:1F:64 base; a MAC merely starting with either base cannot be attributed to Aditec GmbH without checking the fuller prefix.