Nurivoice Co., Ltd holds three MA-L blocks — 00:11:A9, A8:E5:39, and D8:77:66 — all registered to the same Seoul address, NURI Bld, 16 Sapyeong-daero, Seoul Seocho-gu, KR 06552. Nurivoice (branded NuriVoice, founded in South Korea around 2003 under the earlier name Moimstone) is a VoIP hardware maker whose OUIs appear on enterprise and carrier-grade SIP endpoints: wired IP desk phones, Wi-Fi SIP handsets such as the Liberty L2 (802.11 a/b/g/n, BroadSoft-interop-certified), and Android enterprise desk phones such as the Monet UT880 sold through NEC. The company sits within the Seoul-based Nuri Telecom group, which in 2017 acquired Apivio Systems (Richmond, BC) as a North American channel for the same hardware — so an Apivio-branded phone and a NuriVoice phone often share engineering. Korean carriers KT, SK Broadband, and LG U+ are named deployment partners. For triage, a Nurivoice OUI almost always indicates a SIP/VoIP phone — typically on a voice VLAN — and carries the general SIP endpoint threat surface (scanning, credential stuffing, toll fraud) rather than any product-specific published vulnerability; no CVEs were found. Two distinct Seoul entities are easy to confuse with this registrant and are NOT the same company: "NURI Telecom Co., Ltd." (which holds the separate MA-L block 00:0B:12 at a different address) and "NuRi&G Engineering co,.Ltd." (which holds an MA-S block); neither is Nurivoice Co., Ltd.
- IEEE assignment
- 3 prefixes → Nurivoice Co., Ltd, registered Seoul, Seocho-gu, KR [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv: rows D87766, 0011A9, A8E539)
- Registry / block size
- MA-L (24-bit OUI); 3 blocks [Confirmed] — IEEE MA-L / maclookup.app (https://maclookup.app/vendors/nurivoice). NOTE: IEEE's public OUI data publishes NO assignment/registration date; maclookup.app's "First Seen 2004-06-30 / Last Modified 2023-04-24" are third-party database artifacts for the vendor record, not IEEE facts, and are not stated as registration dates here.
- HQ / country
- NURI Bld, 16 Sapyeong-daero, Seoul Seocho-gu, KR 06552 (South Korea) [Confirmed] — IEEE MA-L (oui.csv)
- Company status
- active [Confirmed] — nurivoice.com (http://nurivoice.com/en/about/)
- Device types
- wired IP desk phones, Wi-Fi SIP handsets, Android enterprise desk phones [Confirmed] — nurivoice.com, GlobeNewswire (multiple independent sources)
- Notable products
- Liberty L2 (Wi-Fi SIP phone, 802.11 a/b/g/n, BroadSoft-certified), Monet UT880 (Android desk phone, sold via NEC) [Confirmed] — voipsupply.com, globenewswire.com
- Verified prefix set (all 3, MA-L)
- 00:11:A9, A8:E5:39, D8:77:66 [Confirmed] — IEEE MA-L (oui.csv) / maclookup.app
- Corporate context
- part of the Seoul-based Nuri Telecom group; Nuri Telecom acquired >90% of Apivio Systems Inc. (Richmond, BC) in 2017, making Apivio its North American brand/channel for the same NuriVoice-engineered phones [Confirmed] — globenewswire.com, newswire.ca. Earlier name reported as Moimstone (founded ~2003) [Likely] — cbinsights.com (single primary source for the Moimstone/2003 lineage; tagged accordingly)
- Carrier partners
- KT (Korea Telecom), SK Broadband, LG U+, NEC (Japan/global), BroadSoft (Liberty L2 interop) [Confirmed] — nurivoice.com, globenewswire.com
- Security note
- no CVEs or public advisories found for NuriVoice products (NVD, cvedetails.com); no threat-intel references tying NuriVoice prefixes to malicious activity. Devices carry the general SIP/VoIP endpoint threat surface (SIP scanning, credential stuffing, toll fraud, eavesdropping if unencrypted); the Android-based Monet UT880 adds the broader Android device surface. [Likely] — nvd.nist.gov, cvedetails.com (absence-of-finding, so tagged Likely not Confirmed)
- Disambiguation
- "NURI Telecom Co., Ltd." (MA-L 00:0B:12, different Seoul address) and "NuRi&G Engineering co,.Ltd." (MA-S block in oui36.csv) are distinct organizations, NOT Nurivoice Co., Ltd [Confirmed] — IEEE oui.csv / oui36.csv
- Related vendors
- Apivio Systems (North American sister brand/channel under Nuri Telecom) — may hold separate registrations
- Analyst note
- A Nurivoice OUI almost always indicates a SIP/VoIP phone (wired desk, Wi-Fi handset, or Android desk phone); expect it on a voice VLAN. No IEEE assignment date exists; don't surface a third-party "first seen" date as a registration date.