MAC address vendor

ADC - Global Connectivity Solutions Division — 1 prefix (MA-L)

Primary prefix
00:40:16
Block
MA-L

Summary

// what this is
ADC - Global Connectivity Solutions Division is registered to MAC prefix 00:40:16 in the IEEE OUI database. When a device's MAC address begins with 00:40:16, that block was registered by ADC - Global Connectivity Solutions Division — the OUI identifies the maker of the network hardware, which is not always the brand on the device.
// analyst note
A 00:40:16 OUI most plausibly identifies management/network interfaces on ADC carrier cross-connect or distribution hardware in a telecom central office or data center, not consumer devices.
[ 01 ] — Context

About this vendor.

Updated  ·  Confidence: Medium

"ADC - Global Connectivity Solutions Division" is the exact IEEE-registered name behind OUI 00:40:16, carrying the registry address P.O. Box 1101, Minneapolis, MN 55440-1101 — the historic mailing address of ADC Telecommunications, Inc., the Minneapolis-founded (1935, originally Audio Development Company) telecom-infrastructure manufacturer that traded on NASDAQ for decades before Tyco Electronics (later TE Connectivity) acquired it in July 2010 for roughly $1.25 billion. ADC's core business centered on "connectivity" hardware — DSX-1/DSX-3 digital signal cross-connect frames and DDF fiber/copper distribution frames used by carriers to terminate and patch DS1/DS3 circuits and fiber runs inside central offices and data centers, organized in SEC filings into groups such as broadband, business, and residential connectivity — a structure consistent with a division named "Global Connectivity Solutions," though no independent ADC corporate or SEC document naming that exact division was located. This is a separate, non-merged IEEE registration from ADC Telecommunications' own OUI 00:17:34 (San Jose, CA); the two must not be conflated. As with the sibling vendor-adc entry, "ADC" security searches are dominated entirely by unrelated Citrix NetScaler ADC (Application Delivery Controller) CVEs, a different company and product category.

IEEE assignment
1 prefix → "ADC - Global Connectivity Solutions Division", P.O. Box 1101, Minneapolis, MN, US 55440-1101 [Confirmed] — the IEEE MA-L registry
Registry / block size
MA-L (24-bit OUI); exactly one IEEE prefix for this exact org name across the IEEE MA-L registry, the IEEE MA-M registry, and the IEEE MA-S registry [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry
Verified prefix
00:40:16 (MA-L, "ADC - Global Connectivity Solutions Division") [Confirmed] — the IEEE MA-L registry
HQ / country
P.O. Box 1101, Minneapolis, MN, US 55440-1101 (registry address) [Confirmed] — IEEE MA-L
Company identity
division-level registration tied to ADC Telecommunications, Inc. — founded 1935 as Audio Development Company, Minneapolis, MN; publicly traded on NASDAQ for decades; acquired by Tyco Electronics/TE Connectivity in July 2010 for ~$1.25B enterprise value
[Likely] — en.wikipedia.org/wiki/ADC_Telecommunications, fundinguniverse.com, company-histories.com, SEC EDGAR 10-K
Device types
DSX-1/DSX-3 digital signal cross-connect frames and DDF fiber/copper distribution frames for carrier and enterprise central-office/data-center circuit termination and patching; some panels included SNMP-manageable network-management modules
[Likely] — adckcl.com DSX fundamentals brochure, tiba.at spec sheet
Notable products
none independently confirmed under this exact division name; product-category inference only (see device types) [Unknown]
Allocated date
Unknown/null — IEEE's public the IEEE MA-L registry publishes no assignment/registration date field, and no third-party "date registered" artifact was even found for this specific prefix [Unknown] — the IEEE MA-L registry
Security context
no CVEs or known exploits found for "ADC Global Connectivity Solutions Division" or ADC Telecommunications DSX/DDF hardware; "ADC" security search noise is entirely unrelated Citrix NetScaler ADC (Application Delivery Controller) CVEs (e.g. CVE-2026-3055, CVE-2026-4368)
[Confirmed — negative result] — helpnetsecurity.com, rapid7.com
Related vendors
ADC Telecommunications holds a separate, non-merged IEEE assignment, OUI 00:17:34 (541 E Trimble Road, San Jose, CA); do not merge these entries per the existing vendor-adc convention [Confirmed] — the IEEE MA-L registry
Company substance
not a bare single-OUI shell — the parent org (ADC Telecommunications, Inc.) has an extensive public paper trail (Wikipedia, FundingUniverse, company-histories.com, multiple SEC EDGAR filings, a $1.25B TE Connectivity acquisition) and a second related IEEE assignment (00:17:34); the one gap is that the exact "Global Connectivity Solutions Division" string is corroborated only by the IEEE registry entry and its third-party mirrors, not an independent ADC source [Likely]
Analyst note
a 00:40:16 OUI most plausibly identifies management/network interfaces on ADC carrier cross-connect or distribution hardware in a telecom central office or data center, not consumer or general enterprise devices.
[ 02 ] — OUI prefixes

Assignments by IEEE.

1
// registered prefixes1
  1. 00:40:16MA-L
[ 03 ] — Related

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