CORPORATE VOIP TELEPHONY

VoIP Phone Number Portability

Yes, you keep your existing phone numbers. VoIP porting completes in 24 to 36 hours with zero downtime: we pre-configure the entire new VoIP system in advance, so the moment your old line switches over, the new system is already fully operational. You only sign a single application form, prepared entirely by infoLib.

Check Numbers Process & Cost
100%
Number Retention
24-36h
Completion Time
0 sec
System Downtime
1 Form
Single Application
PORTABILITY SCOPE

Which Phone Numbers Can Be Ported

Every corporate telephone number your enterprise currently uses can be ported to modern VoIP infrastructure in Greece, preserving client reachability and business continuity.

☎

Geographic Numbers

All regional landline numbers across Greece (Athens 210/211, Thessaloniki 2310/2311, and all provincial city codes) transfer directly to VoIP SIP Trunks.

  • Athens (210, 211) & Thessaloniki (2310, 2311)
  • All geographic area codes throughout Greece
  • Seamless migration from OTE, Vodafone, Nova
🏢

DID / DDI Number Ranges

Complete Direct Inward Dialing (DID) consecutive number blocks assigned to departments, branches, or team members transfer concurrently in bulk.

  • Blocks of 10, 20, 50, or 100 consecutive numbers
  • Direct routing to internal extensions & hunt groups
  • Full preservation of corporate extension maps
📞

Toll-Free & Shared-Cost 800 / 801

Toll-free 800 lines and nationwide shared-cost 801 numbers for enterprise customer service, support hotlines, and modern contact centers.

  • Freephone 800 numbers (free of charge for callers)
  • Shared-cost 801 numbers with unified local charge
  • Intelligent routing to IVRs and call queues
EFFICIENT & RELIABLE

The 3-Step Portability Process

Switching to enterprise VoIP is executed with structured rigor without burdening your internal staff with complex telecommunications procedures.

Step 1: Application Signing — Prepared by infoLib

We draft the official portability authorization form utilizing your corporate details and a recent telecom invoice. You simply review, sign, and stamp.

Step 2: VoIP System Pre-Configuration — Prior to Cutover

We build, configure, and rigorously test your Cloud PBX, SIP trunks, IVR trees, office hours, and hardware while your current phone lines continue operating normally.

Step 3: Synchronized Cutover — 24 to 36 Hours

Your numbers port to the new VoIP SIP trunk. The pre-configured system instantly takes over live call routing with zero downtime or disruption.

ZERO DOWNTIME ASSURANCE

Why You Won't Miss a Single Call

The primary concern for any organization switching telecommunications providers is the threat of dropped calls or prolonged communication outages. At infoLib, we engineer a parallel pre-configuration workflow that guarantees 100% call continuity.

Your new Cloud or On-Premise IP PBX telephony system is fully deployed, configured, and tested in a parallel staging environment before any changes are submitted to carrier networks. Extensions, softphones on mobile and desktop, interactive voice menus (IVR), and routing rules are verified in advance. Throughout this entire phase, your legacy phone network continues handling active incoming calls without alteration.

The final cutover occurs synchronously at the scheduled handover window when the Hellenic Portability Database points your telephone numbers to the new VoIP provider's SIP Trunk. Inbound calls seamlessly arrive at the already operational new system. The transition is instantaneous (zero downtime), ensuring no communication gap and zero missed calls.

✓ Parallel IP PBX configuration
✓ Pre-tested VoIP SIP Trunks
✓ Instantaneous cutover switch
✓ 100% inbound call preservation

What Is Required From You

A single signed application form. Nothing else.

No technical steps or coordination headaches are required from your staff. You only provide a signed portability request form (prepared entirely by infoLib) alongside a recent copy of your existing telecom bill verifying line ownership. infoLib oversees all carrier communications, regulatory scheduling, and final verification checks end-to-end.

Portability Cost

€10–15 +VAT per number, one-time fee.

VoIP number portability involves a transparent one-time carrier setup fee of €10 to €15 +VAT per telephone number. There are no recurring number retention surcharges, no hidden fees, and no ongoing portability costs beyond standard SIP trunk line rentals, which typically reduce monthly telecom expenditures by up to 60% compared to legacy ISDN lines.

FAQ & KNOWLEDGE

Frequently Asked Questions

Straightforward answers regarding timeframes, technical procedures, and continuity guarantees for business VoIP number portability.

Can I port existing business phone numbers to a VoIP provider?
Yes, you can port all your existing business telephone numbers to a VoIP provider. Portability applies to geographic landlines across Greece (such as 210 and 2310), multi-number DID ranges, and 800/801 service lines. infoLib manages the complete application and technical provisioning process with telecom carriers.
Can we keep our existing phone numbers when switching to VoIP?
Absolutely. Keeping your established business phone numbers is legally guaranteed under telecommunications regulations. You do not need to update stationery, vehicle graphics, or marketing collateral. Your clients and partners will continue dialling the exact same numbers, experiencing the crystal-clear audio and advanced capabilities of VoIP.
How long does phone number portability take?
VoIP number portability typically completes within 24 to 36 business hours from official application submission. Throughout this period, infoLib fully pre-configures and tests your new IP telephony environment, ensuring that the final cutover occurs synchronously at the scheduled handover window without disruption.
Will our phones go down during the transition?
No, you will experience zero downtime during the transfer. Your existing telephone lines remain operational until the exact moment of cutover. Because your new Cloud VoIP system and IP hardware are fully configured in advance, inbound routing transfers instantly without any interruption or dropped incoming calls.
What documents do I need to sign?
You only need to sign a single standardized portability authorization form, which infoLib prepares entirely on your behalf. You simply provide a copy of a recent telecom bill verifying line ownership and sign the form. Our technical team handles all carrier correspondence and coordination from that point forward.
Can I port an entire sequential range of numbers?
Yes, you can port complete sequential DID/DDI numbering blocks (e.g., 10, 20, or 100 consecutive numbers) in a single unified application. All direct inward dialing extensions for your team members and branches transfer concurrently, preserving existing corporate extension structures while unlocking modern Cloud PBX features.
How much does VoIP number portability cost?
VoIP number portability costs €10 to €15 +VAT per number as a one-time carrier setup fee. There are no additional or hidden migration charges. Following portability completion, businesses benefit immediately from reduced monthly telecom line rentals and dramatically lower call tariffs via VoIP.

Check if your phone numbers can be ported

Speak with infoLib's certified VoIP telephony engineers to verify number portability eligibility and receive a customized zero-downtime migration plan.

Contact Our Engineers
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