8x8, Inc. — 1 prefix (MA-L)

A MAC address starting with 00:90:A0 belongs to 8x8, Inc., and is typically seen on 8x8-branded VoIP desk phones and analog telephone adapters (ATAs) provisioned through the company's cloud communications platform.

8x8 is a publicly traded (NASDAQ: EGHT) cloud communications provider, founded in 1987 and renamed 8x8 in 1996, offering UCaaS (business phone, video, messaging), CCaaS (contact center), and CPaaS APIs. Unlike large multi-block vendors, IEEE records show 8x8 holding exactly one MA-L assignment, with no MA-M or MA-S sub-allocations found under its name.

The IEEE record lists the registrant address as 2445 Mission College Blvd., Santa Clara, CA — 8x8's own site and Wikipedia describe the company as headquartered in Campbell, CA, so the registry address likely reflects an earlier or secondary corporate location rather than the current HQ.

8x8's documentation confirms a physical device ecosystem consistent with a MAC-bearing OUI: an admin-console section for managing devices and a support guide for installing and activating ATAs. No independent teardown or datasheet was found tying the 00:90:A0 prefix to a specific phone model, so device-type identification here is Likely rather than Confirmed.

A third-party site, maclookup.app, shows a "Registration Date" of 1998-04-22 and "Last Updated" of 2015-11-17 for this block. IEEE's own OUI data publishes no assignment or registration dates, so this figure is a database artifact and should not be read as an IEEE-confirmed date. No CVE tied specifically to 8x8 hardware bearing this OUI, and no malware association, was found as of an August 2026 search.

Vendor

8X8 INC. [Confirmed] — the IEEE MA-L registry 0090A0

Device class

VoIP desk phones and analog telephone adapters (ATAs) used with 8x8's cloud communications platform [Likely] — https://docs.8x8.com/8x8WebHelp/admin-console/Content/Manage_your_Devices.htm

Registry / block

MA-L (24-bit OUI), single assignment 00:90:A0; no MA-M or MA-S entries found [Confirmed] — the IEEE MA-L registry 0090A0

Registered address

2445 Mission College Blvd., Santa Clara, CA 95054, US [Confirmed] — the IEEE MA-L registry 0090A0

IEEE assignment

00:90:A0 → 8X8 INC., registered Santa Clara, CA, US [Confirmed] — the IEEE MA-L registry 0090A0

Registry / block size

MA-L (24-bit OUI); one IEEE prefix found for this vendor (no MA-M or MA-S entries) [Confirmed] — the IEEE MA-L registry 0090A0; the IEEE MA-M registry (no match); the IEEE MA-S registry (no match)

HQ / country

2445 Mission College Blvd., Santa Clara, CA 95054, US (registry address; company describes its HQ as Campbell, CA) [Confirmed] — the IEEE MA-L registry 0090A0; https://en.wikipedia.org/wiki/8x8

Company status

active, publicly traded (NASDAQ: EGHT) [Confirmed] — https://en.wikipedia.org/wiki/8x8; https://finance.yahoo.com/quote/EGHT/

Device types

VoIP desk phones, analog telephone adapters (ATAs) [Likely] — https://docs.8x8.com/8x8WebHelp/admin-console/Content/Manage_your_Devices.htm; https://docs.8x8.com/8x8WebHelp/PrepareNetwork_InstallPhone/Content/PrepareNetworkInstallPhones/InstallActivate_ATAs.htm

Notable products

8x8 Work (UCaaS), 8x8 Contact Center (CCaaS), CPaaS APIs [Confirmed] — https://www.8x8.com/s/what-is-ucaas

Verified sample prefix

00:90:A0 (only known assignment) [Confirmed] — the IEEE MA-L registry 0090A0

Third-party date artifact

maclookup.app shows "Registration Date" 1998-04-22 and "Last Updated" 2015-11-17 for 00:90:A0; IEEE publishes no such date for OUI assignments, so this is a database artifact, not an IEEE fact [Confirmed] — https://maclookup.app/vendors/8x8-inc

Security note

no CVE tied specifically to hardware bearing the 00:90:A0 OUI found as of an August 2026 search; 8x8 runs a public HackerOne bug-bounty program and publishes SOC 2 Type II / ISO/IEC 27001:2022 compliance documentation [Likely] — https://www.8x8.com/why-8x8/security-and-compliance

Analyst note

single-OUI vendor; a globally-administered address beginning 00:90:A0 is consistent with genuine 8x8 VoIP hardware, but no independent teardown or datasheet ties this exact prefix to a named device model

[Likely] — https://docs.8x8.com/8x8WebHelp/PrepareNetwork_InstallPhone/Content/PrepareNetworkInstallPhones/InstallActivate_ATAs.htm