City Numbers

What City Numbers does

City Numbers Ltd. is a UK-headquartered telecommunications provider that supplies virtual phone numbers and ancillary telephony services to small and medium businesses and enterprises. The company is registered in Birmingham and operates regional offices in London, Glasgow, Cardiff, and the United States. It runs with a headcount of 11–50 employees and presents itself as an independent UK comms reseller.

Its core catalogue spans UK geographic numbers (01, 02 prefixes), UK non-geographic numbers (0800, 0844, 0845, 0871, 0300, 0333), international virtual numbers covering more than 50 countries and 4,000 cities, international toll-free numbers in 40+ countries, and virtual mobile numbers. Adjacent services include fax-to-email, telephone answering, audio conferencing, Microsoft Teams Calling integration, and a Phone Number Testing utility. Customer-facing feature controls include call whisper, voicemail, divert on busy, time-of-day routing, call queuing, IVR, and an online management portal. Underlying architecture is conventional carrier-grade telephony with multi-carrier routing and number porting rather than a proprietary platform stack.

Revenue is generated through one-time number-provisioning fees, recurring monthly service charges, and a reseller programme. Go-to-market combines direct online sales (driven by SEO across thousands of city-level landing pages) with the reseller channel. Customers are split between SMB (self-serve, lower ARPU, higher churn tolerance) and enterprise (multi-DID deployments, Teams integration, higher ARPU), with no public reference customer list disclosed.

Name

City Numbers

Legal name

City Numbers Ltd.

Website

https://citynumbers.co.uk

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

City Numbers is a UK-based telecommunications reseller supplying virtual, geographic, non-geographic, and toll-free phone numbers across 50+ countries to SMBs and enterprises, monetized via setup fees, monthly subscriptions, and a reseller channel.

Ownership category

akta.pro rank

Product category

Telecommunications Services

NAICS

Wired and Wireless Telecommunications Carriers (except Satellite) (51711), Telecommunications Resellers (517121)

SIC

Telephone Communications (No Radiotelephone) (4813)

akta.pro primary industry

Numbering, DID, Porting & Carrier-of-Record Services (HDAIAHAK)

Keywords

• Virtual phone numbers
• Business telecommunications
• Non-geographic numbers
• Call management services
• International toll free

Headquarters

HQ city

Reading

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Technology or R&D, Operations, Supply Chain, Marketing or Sales, Personnel, Infrastructure

Revenue model

1. Phone Number Sales (One-time Purchase): Customers purchase phone numbers directly from City Numbers' inventory. Numbers can be bought online through the website. This is a one-time acquisition fee for the number itself.
2. Recurring Monthly Service Fees: Ongoing monthly rental/service fees for maintaining phone numbers, call forwarding, and additional services such as voicemail, call whisper, IVR, time routing, fax to email, and audio conferencing. Customers receive fully itemised monthly invoices.
3. Reseller Programme: A dedicated Resellers programme allows partners to resell City Numbers' phone number services under their own brand, generating revenue from markup on numbers and services.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels3 records

Core offering

City Numbers sells virtual and non-geographic business telephone numbers (UK 0800, 0844, 0845, 0871, 0300, 0333, geographic 01/02 virtual numbers, international virtual numbers in 50+ countries, virtual mobile numbers, and international toll free) that forward calls to existing landlines, mobiles or international destinations. The company layers on additional paid services — telephone answering, fax-to-email, audio conferencing, Microsoft Teams calling, phone number testing, and number porting — and equips every number with call-management features such as call whisper, voicemail, divert on busy, time-of-day routing, call queuing, IVR and an online real-time management portal with itemised billing.

Product overview

City Numbers is a UK-based telecommunications company offering a portfolio of telephone number services and call management solutions. The core offering consists of UK non-geographic numbers (0800, 0844, 0845, 0871, 0300, 0333) and virtual numbers (UK geographic virtual numbers, international virtual numbers across 50+ countries with 4000+ city coverage, and virtual mobile numbers). These are complemented by value-added services including International Toll Free numbers, Fax To Email, Telephone Answering, Audio Conferencing, Microsoft Teams Calling, and Phone Number Testing. The company also provides a suite of Incoming Call Features including Call Whisper, Voicemail, Divert on Busy, Time of Day Routing, Call Queuing, and Online Management portal for real-time call stats and number management. All services are managed through an online portal with instant connection and fully itemised monthly invoices.

Differentiator

Problem solved

Functional benefit

Products and services

• 0800 Numbers UK freephone numbers starting with the 0800 prefix that allow customers to call a business at no cost, commonly used for customer service lines, helplines and nationwide contact numbers; calls are forwarded to any landline, mobile or international destination.
• 0844 Numbers UK non-geographic telephone numbers with the 0844 prefix, typically used for customer service lines; calls are charged at local-rate tariffs and the numbers are forwarded to existing landlines, mobiles or international destinations.
• 0845 Numbers UK non-geographic numbers often used for business contact centres, charged at standard local rates from BT landlines, forwarded to any landline, mobile or international destination.
• 0871 Numbers UK non-geographic numbers with higher call rates, often used for technical support or premium-rate service lines; forwarded to any landline, mobile or international destination.
• 0300 Numbers UK non-geographic numbers designed for charities and public sector organisations, charged at standard geographic rates and forwarded to existing landlines, mobiles or international destinations.
• 0333 Numbers UK non-geographic numbers charged at standard rates, popular with businesses wanting a national presence without geographic ties; forwarded to any landline, mobile or international destination.
• UK Virtual Numbers UK geographic telephone numbers (01 and 02 prefixes) that can be forwarded to any landline, mobile or international destination, allowing businesses to appear local anywhere in the UK without physically being there (also known as Areacall, remote call forward, ghost numbers, virtual landlines).
• Worldwide Virtual Numbers Local city phone numbers in over 50 countries and 4000+ cities worldwide that are forwarded to existing phone numbers, enabling businesses to establish a local presence in international markets without opening offices.
• Virtual Mobile Numbers Virtual mobile telephone numbers that can be managed and routed to existing mobile devices, giving businesses a mobile-format contact number.
• International Toll Free Toll-free numbers in over 40 countries, provided by local Telcos (non-VOIP) and forwarded to any landline, mobile or international destination, enabling businesses to attract international customers at no caller cost.
• Phone Number Porting Service to port existing phone numbers from most carriers worldwide to City Numbers' infrastructure, supported by multiple carrier relationships.
• Telephone Answering Professional call answering service where operators handle incoming calls on behalf of businesses to prevent missed calls and lost revenue.
• Fax To Email Service that converts incoming faxes to PDF documents and automatically sends them to the customer's email address.
• Audio Conferencing Free audio conferencing service enabling meetings over the phone with multiple participants.
• Microsoft Teams Calling Integration service allowing businesses to make and receive calls through Microsoft Teams using their City Numbers phone numbers.
• Phone Number Testing Service that allows businesses to test phone numbers before purchase to ensure they meet their requirements.
• Incoming Call Features Suite of call-management add-ons including Call Whisper, Voicemail to Email, Divert on Busy, Time of Day Routing, Call Queuing, IVR/Auto Attendant, Welcome Greeting, Phone Call Recording, Professional Voice Recording and Online Management portal access.
• Resellers Programme Channel partner programme that allows telecoms resellers and managed service providers to resell City Numbers' phone number services under their own brand, with markup on numbers and services.

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature17 records

Scale indicators1 record

Recent moves6 records

Expansion highlights6 records

Direct peers

• Numbergroup: UK-based provider of non-geographic and virtual phone numbers for businesses, with a similar SMB target market and product portfolio to City Numbers, including 0800/0845 numbers and call management features.
• Grasshopper: Virtual phone system for small businesses, providing local and toll-free numbers with call forwarding, IVR, and voicemail. Directly comparable to City Numbers on the SMB virtual number proposition.
• AVOXI: Provider of international virtual numbers, cloud contact center, and SIP trunking across 170+ countries. Overlaps with City Numbers on virtual number provisioning and call forwarding, while expanding into adjacent UCaaS.
• Phone.com: US-based virtual phone system provider for SMBs offering local and toll-free numbers, IVR, call routing, and messaging. Comparable to City Numbers on virtual number provisioning for SMBs with feature-rich add-ons.
• TollFreeForwarding: Direct competitor offering international toll-free and local virtual numbers across 100+ countries with call forwarding features. Closely comparable to City Numbers on product scope, geographic breadth, and target SMB/enterprise customers.
• Global Call Forwarding: Sells international virtual local numbers and toll-free numbers in 140+ countries with forwarding and call management features. Directly comparable on product mix and customer base to City Numbers.
• Telnum: Provider of international virtual local and toll-free numbers with global forwarding coverage. Closely comparable to City Numbers on international inventory breadth and SMB/enterprise virtual number use cases.

Broad incumbents

• 8x8: Global UCaaS and contact center provider whose virtual number offering competes with City Numbers at the SMB and mid-market tiers, typically as part of a broader communications platform.
• Vonage: Communications platform (now part of Ericsson) offering virtual numbers, UCaaS, and APIs. Overlaps with City Numbers on virtual number provisioning but targets a broader enterprise stack with integrated voice, messaging, and video.
• RingCentral: Major UCaaS provider offering cloud phone systems with virtual numbers, video, and contact center as a broad bundle. Overlaps with City Numbers on virtual number provisioning but competes primarily as a full-stack communications platform.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/citynumbers
• Facebookfacebook.com/citynumbersltd
• LinkedInlinkedin.com/company/city-numbers

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about City Numbers