Verizon — 3 prefixes (MA-L)

A MAC address starting with 18:78:D4, 48:5D:36, or 20:C0:47 belongs to Verizon Communications Inc., typically seen on Verizon-branded home and enterprise network hardware such as Fios Quantum Gateway routers, 5G Home Routers, and 4G LTE Network Extenders.

These three blocks are registered under the bare name "Verizon" at One Verizon Way, Basking Ridge, NJ — Verizon's own corporate headquarters, confirming a first-party registration rather than a reseller or shell.

IEEE's registry lists four more Verizon-family OUI blocks under distinct registrant names: Verizon Telematics, Verizon Business, Verizon Connect, and Cellco Partnership (doing business as Verizon Wireless). Each is a separate legal registrant and is tracked as its own vendor entry, not folded into this one.

Verizon's support site documents home and enterprise network hardware consistent with needing its own MAC allocation: Fios Quantum Gateway routers, a 5G Home Router, and 4G LTE Network Extenders. Third-party MAC aggregators map all three prefixes to Verizon but do not name a specific model per individual block.

Fios Quantum Gateway routers carried three disclosed 2019 firmware vulnerabilities — CVE-2019-3914, CVE-2019-3915, and CVE-2019-3916 — reported by Tenable and patched by Verizon in firmware 02.02.00.13. That history is Verizon-brand-level; it has not been confirmed against any one of these three specific OUI blocks.

IEEE's public OUI registry publishes no assignment date for any of these blocks. Third-party lookup tool maclookup.app is internally inconsistent — its Verizon page states one page-level registration date while listing three different per-prefix dates beneath it — evidence the figures are scrape artifacts, not IEEE facts.

IEEE assignment

3 prefixes → "Verizon", registered Basking Ridge, NJ, US [Confirmed] — the IEEE MA-L registry 1878D4, 485D36, 20C047

Registry / block size

MA-L (24-bit OUI); this entry covers the 3 IEEE prefixes registered under the exact bare registrant name "Verizon" [Confirmed] — the IEEE MA-L registry. NOTE: IEEE's public OUI data publishes NO assignment/registration date; any "date registered" on third-party tools is a database artifact, not an IEEE fact — confirmed here because maclookup.app's own Verizon page states one page-level date while listing three different, conflicting per-prefix dates beneath it.

HQ / country

One Verizon Way, Basking Ridge, NJ, US — recorded as ZIP 07920 for 18:78:D4 but ZIP 07030 (Hoboken, NJ's actual ZIP) for both 48:5D:36 and 20:C0:47, with 20:C0:47's row omitting the state abbreviation; quoted as literally recorded, not corrected

[Confirmed] — the IEEE MA-L registry 1878D4, 485D36, 20C047

Company status

active [Confirmed] — verizon.com

Device types

home broadband gateway (Fios Quantum Gateway), 5G Home Router, 4G LTE Network Extender (femtocell) [Likely — Verizon documents these product lines and third-party aggregators map all three prefixes to Verizon, but no source names a specific model per individual prefix] — verizon.com support pages, maclookup.app, netify.ai

Notable products

Fios Quantum Gateway, Verizon 5G Home Router, Verizon LTE Network Extender

Verified prefixes (all 3, MA-L, registrant "Verizon")

18:78:D4, 48:5D:36, 20:C0:47 [Confirmed] — the IEEE MA-L registry 1878D4, 485D36, 20C047

Historic block

none identified — no additional Verizon-family rows found in the IEEE MA-M registry or the IEEE MA-S registry beyond the MA-L rows already covered [Confirmed absence in checked registries] — the IEEE MA-M registry, the IEEE MA-S registry

Security note

Fios Quantum Gateway firmware carried three disclosed 2019 CVEs — CVE-2019-3914 (authenticated command injection, CVSS 8.5), CVE-2019-3915 (credential replay), CVE-2019-3916 (password-salt disclosure) — found by Tenable and patched in firmware 02.02.00.13; brand-level history, not confirmed against a specific one of these three OUI blocks

[Confirmed] — tenable.com/security/research/tra-2019-17, nvd.nist.gov (CVE-2019-3914)

Special note

Four more Verizon-family MA-L blocks exist under DISTINCT IEEE registrant names and are NOT part of this entry: Verizon Telematics (94:8F:EE), Verizon Business (C8:A7:0A), Verizon Connect (7C:A2:36), Cellco Partnership d/b/a Verizon Wireless (E4:A7:FD) — each is tracked as its own separate vendor entry

[Confirmed] — the IEEE MA-L registry 948FEE, C8A70A, 7CA236, E4A7FD

Related vendors

Verizon Telematics, Verizon Business, Verizon Connect, Cellco Partnership (Verizon Wireless) — sibling registrants, separate entries, not this vendor's prefixes

Analyst note

A MAC starting with 18:78:D4, 48:5D:36, or 20:C0:47 identifies hardware registered directly to Verizon Communications Inc.; the four sibling Verizon-family blocks above are separate IEEE registrants and must not be treated as part of this vendor's prefix set [Confirmed] — the IEEE MA-L registry