Only POST is bigger: Mixvoip grows its share of Luxembourg fixed telephony in 2025
by Miroslav MIHAYLOV
on Oct 23, 2026

Only POST is bigger: Mixvoip grows its share of Luxembourg business telephony in 2025

Mixvoip is the second-largest fixed telephony operator in Luxembourg. According to the latest figures from the ILR (Institut Luxembourgeois de Régulation), as of 31 December 2025, POST Luxembourg is first with 73.0%, Mixvoip is second with 7.2%, and all other operators follow with smaller shares.
Our share grew from 6.3% at the end of 2024 to 7.2% at the end of 2025. Mixvoip was also second a year earlier, so 2025 confirms our place as the main alternative to POST for fixed telephony in Luxembourg.
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We help companies make this move in three ways. Our SIP trunk connects an existing phone system to the internet, with certified systems such as Asterisk, 3CX, FreePBX and Microsoft Teams through Direct Routing. Voxbi, our cloud PBX, replaces the on-site phone system with desktop, web and mobile apps. And we port existing Luxembourg numbers, so customers can still reach a company on the same number.

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TLDR: Only POST is bigger: Mixvoip grows its share of Luxembourg fixed telephony in 2025

  • According to ILR figures as of 31 December 2025, POST Luxembourg leads fixed telephony in Luxembourg with 73.0%, followed by Mixvoip at 7.2%.
  • Mixvoip's share grew from 6.3% (end of 2024) to 7.2% (end of 2025), confirming its position as the main alternative to POST for business telephony in Luxembourg.
  • Mixvoip supports companies moving from copper to VoIP in three ways:
    • SIP trunk — connects an existing phone system to the internet, with certified support for Asterisk, 3CX, FreePBX, and Microsoft Teams via Direct Routing.
    • Voxbi — a cloud PBX that replaces on-site phone systems with desktop, web, and mobile apps.
    • Number porting — existing Luxembourg numbers can be transferred, so customers can still reach a company on the same number.
Updated on 2026-11-02

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