HFR, Inc. — 2 prefixes (MA-L)

A MAC address starting with 00:23:AA or 04:09:A5 belongs to HFR, Inc., a South Korean network-infrastructure manufacturer, and typically appears on carrier or enterprise optical transport, packet transport switching, or radio-access-network hardware rather than consumer devices.

HFR, Inc. (KOSDAQ: 230240) is a publicly traded telecom equipment vendor headquartered at 5F, Hana EZ Tower, Seongnam-si, Gyeonggi-do, South Korea — the exact address on both IEEE registry rows. The company holds two independent MA-L (24-bit) OUI blocks, 00:23:AA and 04:09:A5, which is itself a substance signal beyond a bare single-OUI shell registration.

HFR's public product lines are consistent with the device classes these prefixes would appear on: flexiHaul/xHaul WDM optical transport, the M6424 packet transport switch, distributed antenna systems (DAS) for cellular coverage, FTTx access equipment, and private-5G RAN transport (vRAN/vCore). The company also operates an active US subsidiary, HFR Networks, in Richardson, TX, reinforcing that this is an operating manufacturer rather than a dormant registrant.

IEEE's public OUI data does not include a registration date for either block, and a third-party mirror checked for 04:09:A5 showed no date field either, so no date is recorded here. No CVE, NVD, or CISA KEV entry, and no malware/trojan association, was found for HFR networking equipment as of an August 2026 search — a dated negative, not a guarantee, since searches on a short generic company name are noisy. The device-type match above is inferred from HFR's published product catalog, not confirmed against these two prefixes by an independent fingerprinting database.

IEEE assignment

00:23:AA, 04:09:A5 → HFR, Inc., registered Seongnam-si (5F, Hana EZ Tower), Gyeonggi-do, KR 463-870 [Confirmed] — the IEEE MA-L registry MA-L 0023AA, MA-L 0409A5

Registry / block size

MA-L (24-bit OUI); exactly 2 confirmed IEEE assignments to HFR, Inc.; no MA-M/MA-S sub-blocks found under HFR in the IEEE MA-S registry, and no additional rows in the IEEE MA-M registry [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry, the IEEE MA-M registry. NOTE: IEEE's public OUI data publishes NO assignment/registration date (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any third-party "date registered" is a database artifact, not an IEEE fact.

HQ / country

5F, Hana EZ Tower, Seongnam-si, Gyeonggi-do, KR 463-870 (registry address, matches company HQ per corroborating sources) [Confirmed] — the IEEE MA-L registry MA-L 0023AA; https://www.hfrnetworks.com/

Company status

active, publicly traded (KOSDAQ: 230240) [Confirmed] — https://stockanalysis.com/quote/kosdaq/230240/company/; https://finance.yahoo.com/quote/230240.KQ/profile/

Device types

optical/wireless network transport, packet transport switches, DAS, FTTx access equipment, private-5G RAN [Likely] — https://www.hfrnetworks.com/ (product-catalog match, not confirmed against these two prefixes by an independent MAC fingerprint database)

Notable products

flexiHaul/xHaul WDM transport, M6424 packet transport switch, private-5G RAN (vRAN/vCore) [Likely] — https://www.hfrnetworks.com/

Verified sample prefixes (both MA-L, HFR, Inc.)

00:23:AA, 04:09:A5 [Confirmed] — the IEEE MA-L registry MA-L 0023AA, MA-L 0409A5

Historic / additional block

Unknown — no earlier or additional HFR OUI assignment found beyond the two listed, across the IEEE MA-L registry, the IEEE MA-M registry, and the IEEE MA-S registry [Confirmed absence in checked registries] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

Registration date

Unknown — IEEE publishes none, and a third-party mirror checked for 04:09:A5 also showed no date field [Confirmed absence] — https://hwaddress.com/mac-address-range/04-09-A5-00-00-00/04-09-A5-FF-FF-FF/

Security note

no CVE, NVD, or CISA KEV entry, and no malware/trojan association, found for HFR networking equipment as of an August 2026 search [Likely — absence finding, generic company name is search-noisy] — no citable URL (negative web search)

Special note

00:23:AA and 04:09:A5 are solely and independently assigned to HFR, Inc. — not a shared IEEE base like 70:B3:D5 or 8C:1F:64, so ownership attribution to HFR for these two prefixes is direct [Confirmed] — the IEEE MA-L registry

Related vendors

HFR Networks (US subsidiary, Richardson, TX) [Likely] — https://www.hfrnetworks.com/