This page describes virtual phone numbers for business and wholesale use — numbers that route inbound calls into company phone systems, contact centres, and carrier networks. It is not about consumer privacy apps, second-line apps, or temporary numbers, which serve individuals rather than organisations.

In everyday telecom usage, "virtual number" and "DID number" refer to the same thing. "Virtual" describes where the number lives (the cloud); "DID" describes how it behaves (routed directly into a phone system).

How does a virtual phone number work?

A virtual phone number works by pairing a public number with a cloud routing rule instead of a physical wire. When a caller dials it, the call crosses the PSTN (Public Switched Telephone Network — the traditional global phone network) to the carrier that owns the number range, which passes it to your provider. The provider forwards it to you as a SIP (Session Initiation Protocol — the standard for internet telephony) call carrying the dialled number.

From there the number resolves to wherever you point it: a PBX (Private Branch Exchange — an organisation's call-switching system), a softphone app, an IVR menu, or a forward to another number. Because the routing is software, you can change the destination, add failover, or spread one number across a team without re-provisioning anything.

How is a virtual number different from a SIM or a phone line?

A SIM card or a copper/fibre line ties a number to a specific device or physical circuit. A virtual number has no such attachment — it is a routing entry that can be answered on any SIP-capable endpoint, moved between systems, or pointed at a different country's team in seconds. That independence from hardware is what makes a virtual number practical for distributed and cross-border operations.

What do businesses use virtual phone numbers for?

The common cases are all about reach and control:

  • Local presence — publish a local number in a country you sell into so customers recognise and answer the call, without opening an office there.
  • Contact-centre origination — bring inbound calls from many countries onto one platform over a single SIP trunk.
  • Departmental and campaign numbers — give teams, regions, or marketing campaigns their own trackable number.
  • Voice for software and AI agents — give an application or a voice AI agent a real, diallable number in-market.

Types of virtual phone numbers

Virtual numbers are available as local, national, toll-free, and mobile-range numbers, with availability set per country by the local regulator and carriers. The coverage table shows which types are stocked in each market, and DID vs virtual numbers explains when to choose each.

Frequently asked questions

Is a virtual phone number the same as a DID number?

For most business purposes they are the same. "DID" is the telecom-engineering term for a number routed directly into a phone system; "virtual number" is the plain-language name for any cloud-routed number. Both are provisioned online and delivered over SIP.

Do virtual phone numbers need a SIM card?

No. A virtual number lives in the cloud and is routed over the internet, so it does not depend on a SIM or a physical line. Calls arrive at your SIP system, softphone, or a forwarding destination you set.

Can a virtual number keep a local area code?

Yes. A local virtual number carries the geographic prefix of the city or region it belongs to, so it reads as local to callers there, while the calls route to your team anywhere in the world.

Can virtual numbers send and receive SMS?

Some can, depending on the country and number type — not every number range supports messaging. Voice availability and SMS capability are shown per country and type at the point of order.

Get a virtual phone number

Temptera offers virtual numbers across 100+ countries, delivered over SIP with instant provisioning and pay-as-you-go pricing — no minimums, no lock-ins. Route-specific rates appear live once you create an account. Browse country coverage or read what a DID number is next.

Popular markets for virtual numbers include the US (+1), the UK (+44), Germany (+49), France (+33) and Australia (+61).