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.

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