Post Telecom
📞 Post Telecom is Luxembourg's national incumbent operator, owned by the Luxembourg government. Since 2024, all business telephony, Cloud PBX, and ICT services have moved to DEEP, Post's dedicated B2B brand. Post continues to serve residential customers and basic SME services under the post.lu brand.
Who Is Post Telecom?
Post Telecom, formally known as Entreprise des Postes et Télécommunications (POST Luxembourg), is the state-owned national operator. It operates Luxembourg's primary fixed and mobile network infrastructure, which other licensed operators in the country rely on.
For businesses, the key distinction to understand is the brand split introduced in 2024. Post divided its operations into two separate brands: post.lu for residential and basic consumer services, and DEEP for all business telephony, Cloud PBX, unified communications, and enterprise IT.
If you are looking for a Cloud PBX solution from Post, you are looking at DEEP Telecom, not post.lu.
Does Post Telecom Offer Cloud PBX?
Not under the Post brand. Business telephony products, including hosted PBX and managed unified communications, are sold exclusively under the DEEP Telecom brand. Post's own website does not market a standalone Cloud PBX product for businesses.
If you are an existing Post customer on basic fixed lines, your service is likely being migrated to an All-IP infrastructure as Luxembourg phases out legacy ISDN and analogue networks. This transition is a common moment when businesses reconsider their telephony setup entirely.
The Post and DEEP Brand Split
📋 Which brand covers what?
Post Luxembourg operates two distinct customer-facing brands.
post.lu covers residential broadband, consumer mobile, basic landlines, and postal services for individuals and very small businesses.
DEEP covers all business telephony (including Cloud PBX, Cisco Webex, and Microsoft Teams integration), enterprise data centre services, managed IT, and connectivity for mid-market and large organisations.
The two brands share the same network infrastructure and legal entity but operate as separate commercial divisions with different sales teams, pricing structures, and product catalogues.
🔄 What does the ISDN phase-out mean for Post customers?
Luxembourg is migrating from legacy ISDN and analogue telephone lines to All-IP infrastructure. Businesses that currently use Post basic fixed lines will need to move to an IP-based solution. DEEP offers this transition within the Post group, but independent providers also offer a simpler, more cost-transparent path.
Number portability is regulated by the ILR (Institut Luxembourgeois de Régulation), which means businesses can switch providers and keep their existing numbers regardless of which operator currently holds them.
🏗️ Who uses Post network infrastructure?
Post operates Luxembourg's primary mobile network. Several other licensed operators use this infrastructure to provide mobile services to their own business customers. This means businesses can use a provider other than Post for their Cloud PBX and still benefit from Post's mobile network coverage through that provider's mobile offering.
How Post Compares to Other Luxembourg Providers
Criterion | Post basic lines | DEEP Telecom | Tango Fix4Bizz | Cegecom |
Cloud PBX product | No | Yes | Yes | Yes |
Target customer | Residential / basic SME | Enterprise | SME (bundled) | B2B only |
Transparent pricing | No | No | Partial | No |
ISP independence | N/A | No | No | No |
Greater Region numbers | Luxembourg only | Luxembourg only | Luxembourg only | Luxembourg only |
✅ Choose DEEP if: You are a medium to large enterprise seeking a fully integrated solution from Luxembourg's largest operator, including Cisco Webex or Microsoft Teams integration and dedicated account management.
🟡 Consider Tango or Cegecom if: You are a smaller business looking for a bundled local solution and your operations are based entirely in Luxembourg.
🔎 Consider an independent provider if: You need transparent pricing, ISP-independent Cloud PBX, or phone numbers across multiple countries in the Greater Region.
Frequently Asked Questions
I use Post for my business phone. Do I need to contact DEEP?
It depends on your service. If you have basic fixed lines from post.lu, you can keep those and add a Cloud PBX from an independent provider. If you want Post's own hosted PBX or managed communications service, you need to contact DEEP directly, as Post does not sell those products under the post.lu brand.
Can I keep my Post phone number if I switch providers?
Yes. Number portability is regulated in Luxembourg by the ILR. You can move your existing Post number to another provider without interruption to your service.
What is the difference between Post and DEEP?
Post and DEEP are two commercial brands of the same legal entity, POST Luxembourg. Post covers consumer and residential services. DEEP covers all business telephony, IT, and enterprise services. The split was formalised in 2024.
Is Post regulated by the ILR?
Yes. POST Luxembourg holds an operator licence regulated by the ILR (Institut Luxembourgeois de Régulation), the same body that regulates all licensed telecom operators in Luxembourg.
Compare Other Providers
🔎 Exploring your options? Post is one of several operators with a presence in Luxembourg. Compare across providers to find the right fit for your business.
🏢 DEEP Telecom — Post's dedicated B2B brand. Full-service provider for enterprise telephony, managed IT, and data centre services.
📡 Tango — National mobile and fixed operator. Fix4Bizz is a simple Cloud PBX bundled with Tango internet. ISP lock-in applies.
🔗 Cegecom — B2B-only provider with fibre-first infrastructure and managed voice services for businesses.
🌐 Proximus NXT — Belgian operator with a presence in Luxembourg, focused on mid-market and enterprise contracts.
📅 Ready to explore Cloud PBX for your business?
Start with the provider comparisons or feature guides. If you want expert help, book a short call with a consultant.
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