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About us

Tamar Telecommunications head office.

Tamar Telecommunications head office.

Tamar Telecommunications® is a trading name of Kalnet4u Ltd, trading since March 2002 and incorporated as a limited company in February 2003.

In 2011 Tamar Telecommunications® became a network operator in its own right. We provide a range of business telecom products and services designed and managed by our in-house team of technical engineers. Our services are constantly evolving to meet the needs of the modern day business. Our core services are the provision of 0800 numbers, 03 Numbers and local geographic numbers (virtual landline numbers) for over 650 UK towns and cities.

We have been providing telephone numbers for businesses for over 17 years and believe that our numbers and services can make a real difference to your business.

Over the years we have built up a large loyal customer base made up of small businesses, local councils, national charities and large corporate companies employing thousands of staff around the world. As a company we can adapt our approach to suit the sole trader through to the large corporate clients for whom we provide a dedicated account manager. Many of our new customers come to us from referrals from our existing customers recommending our services to them.

Richard in customer services.

Richard in customer services.

Being a network operator and not a re-seller of one, means that we can offer some of the best rates and services in the industry. Our team of highly trained staff are on hand to offer support by telephone, email and online. We will always do our utmost to help you.

We believe in offering fast and efficient customer service and usually reply to emails within 2 working hours and answer telephone calls within two rings during our office hours of 9am – 5.30pm, Monday to Friday. Our customers have come to expect a fast and efficient response and this we aim to provide to all our customers.

Over the past three months, 96.43% of calls we received were answered within 10 seconds.

What our customers say…


Made everything so easy

Having a freephone number couldn’t be more affordable. We offer the very best service to our clients and expect the same from our providers. Tamar Telecommunications made everything so easy, affordable setup costs, no hidden charges and the very best customer service you could ask for, absolutely brilliant.

J Rees


Fantastic Service

Just come off the phone with one of your ladies, and would like to say, what a fantastic service, friendly, efficient and really helpful, thank you.

C Carr


Excellent service

Excellent service providing a great service for virtual offices and solutions that help you grow and manage your business. Real people to talk to that know their products and services and do not give you the big sales pitch!

Natalie Smith
See more testimonials

If you are looking for a new service provider why not give us a try?

Company Details

Full Company Name: Kalnet4u Ltd t/a Tamar Telecommunications®.
Company Reg. Number: 4655311
VAT Reg. Number: 812 4081 65
Data Protection Act. Reg. Number: Z7785470
Registered Company Address: 19 Research Way, Derriford, Plymouth, PL6 8BT
‘Tamar Telecommunications’ and the marble device are registered trademarks of Kalnet4u Ltd.

Tamar Telecommunications® supports the 1000 Club Campaign, whose aim is to recruit 1000 companies in the Plymouth area to commit to support young people into employment, whether that be through work experience, apprenticeship, graduate internships or employment.