Fon Technology S.L. — 3 prefixes (MA-L)

A MAC address beginning with 00:18:84, C4:71:30, or 18:AA:45 belongs to Fon Technology S.L. (one of the three registry rows lists the name simply as "Fon Technology"), the Madrid-founded company behind the La Fonera line of Wi-Fi hotspot routers. All three are independent IEEE MA-L (24-bit) blocks, not slices of a shared base, so a device on any of them is attributable to this vendor specifically.

Fon was founded in 2006 in Madrid by Martín Varsavsky around a shared Wi-Fi model: each La Fonera router broadcasts a private SSID for the owner and a public "Fonero" SSID for other members. The flagship La Fonera ran OpenWrt-based firmware; later hardware included the Fonera 2.0n, the Fonera SIMPL, and the La Fontenna range-extender antenna.

The company later pivoted toward carrier-grade Wi-Fi partnerships, including a 2007 Time Warner Cable hotspot deal, and shifted more of its business toward software-based Wi-Fi solutions for telecom operators. Wikipedia records the entity as defunct in August 2019, but Barcelona-based Agile Content, S.A. acquired "Fon Technology, S.L." in April 2021 and folded its Wi-Fi technology into a TV/video service offering, so the legal entity persisted as an acquired subsidiary rather than disappearing.

Registry addresses differ across the three prefixes: 00:18:84 and C4:71:30 both list Avda. Bruselas, n. 7, Planta 3, Alcobendas, Madrid, Spain, while 18:AA:45 lists an earlier address, C/Quintanavides 15, Edificio 2, Planta 1, Spain, and drops the "S.L." suffix — consistent with the company moving offices from an earlier Madrid location to Alcobendas over its lifetime.

One NVD-recorded vulnerability applies to the flagship hardware: CVE-2011-1326, a remote denial-of-service flaw in La Fonera+ firmware before version 1.7.0.1 (CVSS 2.0 base 6.1, medium). No malware or trojan association is recorded for this vendor or its prefixes as of an August 2026 search.

Device class

Wi-Fi hotspot router / access point (La Fonera product line) [Confirmed] — en.wikipedia.org/wiki/Fon_Wireless

Also seen on

carrier/telco Wi-Fi hotspot deployments, e.g. the 2007 Time Warner Cable partnership [Confirmed] — techcrunch.com

Registrant name variants

"Fon Technology S.L." on 00:18:84 and C4:71:30; "Fon Technology" (no suffix) on 18:AA:45 [Confirmed] — the IEEE MA-L registry 001884, the IEEE MA-L registry C47130, the IEEE MA-L registry 18AA45

Known vulnerability

CVE-2011-1326, La Fonera+ firmware <1.7.0.1, remote DoS [Confirmed] — nvd.nist.gov

IEEE assignment

3 prefixes → Fon Technology S.L. / Fon Technology, registered Alcobendas, Madrid, Spain (2 of 3 rows) and Madrid, Spain (1 of 3 rows) [Confirmed] — the IEEE MA-L registry 001884, the IEEE MA-L registry C47130, the IEEE MA-L registry 18AA45

Registry / block size

MA-L (24-bit OUI) x3; each an independent /24, not slices of a shared IEEE base [Confirmed] — the IEEE MA-L registry

HQ / country

Avda. Bruselas, n. 7, Planta 3, Alcobendas, Madrid, Spain 28100 (current registry address on 001884 and C47130); earlier address C/Quintanavides 15, Edificio 2, Planta 1, Spain (18AA45) [Confirmed] — the IEEE MA-L registry 001884, the IEEE MA-L registry C47130, the IEEE MA-L registry 18AA45

Company status

reported defunct August 2019 (Wikipedia); acquired by Agile Content, S.A. in April 2021, persists as a subsidiary [Confirmed] — en.wikipedia.org/wiki/Fon_Wireless, broadbandtvnews.com

Device types

Wi-Fi hotspot routers, access points [Confirmed] — en.wikipedia.org/wiki/Fon_Wireless

Notable products

La Fonera, Fonera 2.0n, Fonera SIMPL, La Fontenna range extender [Confirmed] — en.wikipedia.org/wiki/Fon_Wireless, govtech.com

Verified sample prefixes (all MA-L)

00:18:84, C4:71:30, 18:AA:45 [Confirmed] — the IEEE MA-L registry 001884, the IEEE MA-L registry C47130, the IEEE MA-L registry 18AA45; maclookup.app

Registration dates

IEEE's public OUI data (the IEEE MA-L registry) publishes no assignment/registration date for any registrant; maclookup.app separately lists per-prefix "initial registration" scrape dates (001884: 2006-06-13; C47130: 2012-03-01; 18AA45: 2013-09-12) that are third-party database artifacts, not IEEE facts

[Confirmed] — the IEEE MA-L registry, maclookup.app

Special note

known CVE-2011-1326 (La Fonera+ remote DoS, firmware <1.7.0.1); a separate 2006 hobbyist writeup describes CGI-script exploitation of the original La Fonera to obtain a root shell, but this is not a tracked CVE; no malware/trojan association found as of an August 2026 search

[Confirmed] — nvd.nist.gov, slashdot.org

Related vendors

Agile Content, S.A. (acquirer, April 2021) [Confirmed] — broadbandtvnews.com, marketscreener.com

Analyst note

a MAC on 00:18:84, C4:71:30, or 18:AA:45 is attributable to Fon Technology specifically — three independent /24 blocks, not slices of a shared base. Most plausibly a La Fonera-family router or hotspot AP, though after the 2021 Agile Content acquisition the company also licensed software-based carrier Wi-Fi, so not every device on these prefixes is necessarily consumer CPE

[Likely] — en.wikipedia.org/wiki/Fon_Wireless, broadbandtvnews.com