Business phone systems and VoIP in London
Businesses in London use Alltone Telecoms for VoIP phone systems, local 020 numbers, inbound call routing and live answering. Local numbers, UK-based support and no lines to install.
Telecoms for London businesses
From the City and Canary Wharf to Shoreditch, King's Cross and the West End, London teams tend to be spread across offices, home desks and client sites. A cloud system keeps one 020 number in front of all of them.
We set up and support everything remotely, and our services are delivered across England. Where an engineer visit is needed for broadband, leased lines or cabling, we arrange it through national partners.
London at a glance
| Area code | 020 |
|---|---|
| Number format | 020 xxxx xxxx |
| County or area | Greater London |
| Region | London |
| Freephone and national | 0800, 0808, 0330, 0333 |
Services in London
Choose a service to see what is included, or ask us to quote for a complete setup.
- Business VoIP phone systems in LondonCloud phone system with apps, desk phones and a web dashboard.›
- Inbound call management in LondonRoute every incoming call to the right person, team or site.›
- Call answering service in LondonLive UK receptionists who answer in your company name.›
- Outbound calling in LondonShow your business number, record calls and stay within Ofcom rules.›
- Microsoft Teams calling in LondonMake and take real phone calls inside Microsoft Teams.›
- PSTN switch-off migration in LondonMove off analogue and ISDN lines before they are retired.›
- Business broadband in LondonFull fibre and FTTC broadband with static IPs and UK support.›
- Leased lines in LondonDedicated, symmetrical fibre with a fix-time SLA.›
A local 020 number for your business
People are more likely to answer and return calls from a number they recognise. A 020 number gives you a London presence on your website, Google Business Profile and adverts, while calls ring whichever phones you choose.
London business phone questions
Something else on your mind? Call 020 7112 8558 or send us a message and a telecoms specialist will reply.
What is the area code for London?
The area code for London is 020. Local numbers are written in the format 020 xxxx xxxx.
Can I get a 020 number if my office is not in London?
Yes. A virtual 020 number can ring any phone in the UK, which is useful if you serve customers in London from another base or work from home. The number should be used for genuine business in or with the London area.
Can I keep my existing London number if I move to VoIP?
Yes. We port 020 numbers from your current provider to our cloud platform, so you keep your number and stop paying for the old line.
How does the PSTN switch-off affect businesses in London?
Openreach is retiring the analogue phone network across the UK, including Greater London, with a fixed date of 31 January 2027. Any business in London still using analogue or ISDN lines, or devices that depend on them, needs to move to a digital service.
Get a quote for your London business
Tell us how your business takes calls today and we will recommend a setup, with a clear monthly price. Most quotes are ready the same day.
- UK-based support team
- Free setup and number porting on most plans
- Monthly rolling options available
- No obligation quote
Prefer to talk? Call 020 7112 8558, Monday to Friday, 9am to 5.30pm.