U.S. Robotics — 2 prefixes (MA-L)

U.S. Robotics (USRobotics) holds two distinct MA-L blocks that both normalize to the "u-s-robotics" slug: 00:14:C1, registered to "U.S. Robotics Corporation" at 935 National Parkway, Schaumburg, IL, and 00:C0:49, registered to "U.S. ROBOTICS, INC." at the older 8100 North McCormick Blvd, Skokie, IL address. This is the same real company under two legal-name/address registrations from different eras, not a collision between unrelated registrants — the Schaumburg address matches USRobotics' current/recent headquarters, while Skokie is a legacy address, mirroring how Apple's OUI blocks carry a mix of current and legacy registry addresses. USRobotics is a well-documented networking-hardware maker founded in 1976 in Chicago (the name references Isaac Asimov's "U.S. Robots and Mechanical Men"), best known for the Courier and Sportster dial-up modem lines and the proprietary HST modem protocol (1986). It acquired Palm Inc. in 1995, merged into 3Com in 1997, was spun out again in 2000, and has operated since 2013 as a subsidiary of UNICOM Global, headquartered in Schaumburg, IL. Current product lines — analog/dial-up and cellular modems, wired/wireless routers, VoIP and remote-management gateways — match the OUI's expected device context, so this entry is consolidated as one substantive vendor rather than treated as a bare single-OUI shell.

Slug collision

two distinct MA-L registrants both normalize to "u-s-robotics" via the pipeline's slug function; resolved here as one consolidated company entry (same real company, two legal-name/address eras), consistent with the Apple multi-prefix precedent.

[Confirmed] — the IEEE MA-L registry; this site's own tooling

IEEE assignment (block 1)

00:14:C1 → "U.S. Robotics Corporation," 935 National Parkway, Schaumburg, IL 60173-5157, US [Confirmed] — the IEEE MA-L registry; https://udger.com/resources/mac-address-vendor-detail?name=u-s-robotics_corporation

IEEE assignment (block 2)

00:C0:49 → "U.S. ROBOTICS, INC.," 8100 North McCormick Blvd, Skokie, IL 60076-2999, US [Confirmed] — the IEEE MA-L registry; https://maclookup.app/macaddress/00c049

Registry / block size

MA-L (24-bit OUI) for both blocks; no MA-M/MA-S matches found under either org name [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Company status

active, subsidiary of UNICOM Global (UNICOM Systems, Inc.) since 2013, HQ Schaumburg, IL, ~125 employees [Confirmed] — https://en.wikipedia.org/wiki/USRobotics

Company history

founded 1976 Chicago; Courier/Sportster modems and HST protocol (1986); acquired Palm Inc. 1995; merged into 3Com 1997; spun out independent 2000 [Confirmed] — https://en.wikipedia.org/wiki/USRobotics

Device types

analog/dial-up modems, cellular modems and gateways, wired/wireless routers, VoIP/console-server and remote-management hardware [Confirmed] — https://support.usr.com/support/overview-template.asp?prod=s-mac

Third-party date caveat

maclookup.app lists "first seen" 2000-11-09 (00:C0:49) and 2005-05-27 (00:14:C1), both "last modified" 2015-11-17 — these are third-party crawl/index artifacts, NOT IEEE-published registration dates; IEEE's the IEEE MA-L registry publishes no assignment dates.

[Confirmed as artifact, not fact] — https://maclookup.app/macaddress/00c049

Allocated date (IEEE)

Unknown/not applicable — IEEE does not publish OUI assignment dates for either block. [Unknown] — no citation (absence confirmed via the IEEE MA-L registry schema)

Security/CVE context

Unknown — a cvedetails.com vendor page exists but returned HTTP 403 on fetch and was not verified; no confirmed CVEs are asserted. The one documented historical issue (Courier modems crashing under high call volume at CompuServe) is a reliability bug, not a security vulnerability.

[Unknown] — https://www.cvedetails.com/vendor/2143/U.s.robotics.html (unverified, 403)

Related vendors

3Com (former parent, 1997–2000); Palm Inc. (acquired 1995, later divested); UNICOM Global (current parent, 2013–) [Likely] — https://en.wikipedia.org/wiki/USRobotics