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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, 98.10% of calls we received were answered within 10 seconds.

What our customers say…

Can’t believe that everything was done so quick

Very good service, I can’t believe that everything was done for me so quick!

J Borkovski

Fast efficient service

Thanks for your fast efficient service. In a world where people are often quick to complain when things don’t go smoothly, it’s nice to be able to say thank you for a job well done. I’ve already had a look at the control panel and it’s much more comprehensive than our existing supplier, this will allow us to manage our calls much easier than at present. Once again thank you.


Always Willing to Assist

All the staff at Tamar Telecommunications are helpful and friendly. Whenever, I am not sure of navigating around my login pages they are always willing to assist. They never seem to be phased by my requests.

Carl Eden of Parkwood Florists
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.


© 2021 Tamar Telecommunications - ‘Tamar’, ‘Tamar Telecommunications’ and the marble device are registered trademarks of Kalnet4u Ltd.

Kalnet4u Ltd. T/A: Tamar Telecommunications. Registered in England – Reg No 04655311. Registered Office: 19 Research Way, Derriford, Plymouth, PL6 8BT