The Problem a Virtual Number Solves
Imagine you are a freelance consultant based in London, but half your clients are in Germany. When you call a German client from your +44 UK mobile number, a few things happen:
- The client sees an unfamiliar international number and may not pick up
- You pay international calling rates on your mobile plan
- The client pays international rates to call you back
- You look like an outsider, not a local provider
A virtual German phone number — a real +49 number that rings to you in London — changes this dynamic entirely. German clients see a familiar local number. They call you at local rates. You answer on your existing device, wherever you are.
This is what a virtual local phone number does: it gives you a local telephone presence in a market where you are not physically located.
How It Actually Works
A virtual phone number is a real telephone number — registered with the local carrier infrastructure, visible in phone directories, dialable from any phone in the world. The difference from a traditional number is that it has no fixed physical endpoint.
Instead of routing to a specific phone line at a specific address, it routes to a cloud telephony platform that forwards calls to wherever you configure: your mobile, a softphone app, a browser-based VoIP client, or a team's shared device.
The forwarding is invisible to the caller. They dial a German number and reach you. Whether you are in London, New York, or Bali is their business only if you choose to tell them.
Types of Virtual Numbers
Geographic numbers carry a real city or region code. A +49 30 number is a Berlin number. A +33 1 number is a Paris number. These carry the strongest local credibility and are the most common choice for businesses wanting presence in a specific city.
Non-geographic numbers have national prefixes that do not indicate a specific city — in Germany, 0800 (freephone) and 0180x (national rate) numbers fall into this category. These signal national presence rather than local presence. Useful for companies serving an entire country rather than a specific city.
Mobile numbers in some countries (e.g., UK +44 7 numbers) are available as virtual numbers. Less common but useful for markets where mobile numbers carry different social signals than landlines.
What Virtual Numbers Cost
Virtual numbers are typically priced in two components:
Monthly rental: The cost of holding the number. Rates vary by country: UK and US numbers are typically $2–8/month. French, German, and Dutch numbers are similar. Some countries (Australia, Brazil, India) have higher rental costs due to local regulatory requirements.
Per-minute inbound rates: When someone calls your virtual number, forwarding the call to your device costs per-minute. Typical rates are $0.01–0.06/min depending on the forwarding destination (forwarding to a local phone in the same country is cheapest; forwarding to an international mobile is most expensive).
This is where many businesses are surprised: the cost of the number itself is small; the cost of receiving calls on it can add up. If you receive high volumes of inbound calls, optimise the forwarding destination to minimise per-minute forwarding costs.
Outbound Calling: The Other Half of Local Presence
A virtual number solves the inbound problem — people can call you at local rates, and you answer on your device. But outbound calling is equally important. When you call out, you want clients to see your local number in their caller ID.
This is where it gets slightly more complex. Many virtual number providers allow you to set your outbound caller ID to your virtual number. This means when you call a German client, their phone displays your +49 Berlin number — not your personal UK mobile.
The mechanism: you call out via VoIP (either through the provider's softphone app or a browser-based service that supports custom caller ID), and the platform presents your virtual number as the outgoing caller ID to the destination network.
When fully set up, your communication is bidirectional under the local number: inbound calls come to your virtual number and ring your device; outbound calls go out displaying the same virtual number.
Who Actually Uses Virtual Numbers
Freelancers and consultants working with international clients. A German-based UK consultant is a more credible vendor to a German Mittelstand company than an anonymous international number.
E-commerce businesses selling into a foreign market. Trust is a purchasing factor — a local support number on a French e-commerce site converts better than a foreign number.
Startups validating international markets before establishing a legal entity. A virtual number lets you test customer acquisition in Germany without opening a German GmbH.
Remote customer support teams fielding calls on behalf of clients in a specific country. The agents can be anywhere; the number is local.
Distributed teams where different team members handle calls across time zones, all presenting the same local number to callers.
What Virtual Numbers Cannot Do
Virtual numbers are not perfect. A few limitations worth knowing:
They cannot receive SMS in all configurations. SMS forwarding from virtual numbers is not universally supported and depends on the carrier and country. If you need SMS capability on a foreign number, verify this explicitly with your provider.
Emergency services (999/911/112) cannot be reliably reached via virtual number infrastructure. This is a legal and regulatory constraint, not a configuration issue.
Some services reject virtual numbers. Banks and identity verification services increasingly detect virtual/VoIP numbers and may refuse to use them for account creation or 2FA. This is an industry-wide pattern, not specific to any provider.
Getting Started
The practical steps are straightforward:
- Choose a virtual number provider that covers your target country
- Select a geographic number in the city most relevant to your clients
- Configure forwarding to your preferred device or softphone
- Set up outbound caller ID to display your virtual number
- Test both inbound and outbound before using it with clients
For teams already using Voxa for outbound calling, the combination of a virtual inbound number from a DID provider plus Voxa for outbound creates a complete local presence setup at low cost — without any per-seat licensing.