Receiving unwanted telephone calls is frustrating. When those calls are persistent, misleading or silent, we understand why people want answers—and why they want the calls to stop.
At Core Telecom, we want to be clear about who we are, how our network operates and our position on nuisance calling.
Core Telecom is a global telecommunications network. We provide the connections and services that businesses, charities and other telecommunications providers use to communicate across the world.
We do not make telephone calls, offer call centre solutions or conduct spam or nuisance-calling campaigns. We take complaints about unwanted calls and suspected number misuse extremely seriously.
What are nuisance calls?
Nuisance calls are unwanted telephone calls that cause inconvenience, disruption or distress. They can include unsolicited sales calls, repeated marketing calls after someone has asked not to be contacted, and recorded marketing messages received without the necessary permission. Silent and abandoned calls—where nobody speaks or no agent is available when you answer—are another common source of concern.
Scam calls are a related but distinct problem. These involve someone attempting to deceive the recipient, often by pretending to represent a trusted organisation and asking for money, passwords or personal information. Not every unwanted call is a scam, but neither nuisance calling nor fraudulent activity should be dismissed.
Not every unexpected business call is unlawful. However, organisations must follow the rules governing telephone marketing. In the UK, these include respecting requests to stop calling, observing Telephone Preference Service restrictions and obtaining specific consent before making automated marketing calls that play recorded messages.
Our stance is clear: we do not support nuisance calling, harassment, fraud or the unlawful use of telecommunications services.
Why might Core Telecom’s name appear against a telephone number?
When someone receives an unwanted call, it is understandable that they may search online for the number displayed on their phone.
However, there is an important distinction between the network associated with a telephone number and the person or organisation making a call.
In the UK, Ofcom allocates blocks of telephone numbers to telecommunications providers. Those providers can then supply numbers to businesses, individuals or other service providers. A network’s association with a number does not, by itself, establish that the network operator made the call.
This distinction matters when a telephone number is linked to Core Telecom. It helps explain our role, but it does not lessen our commitment to taking concerns seriously.
Understanding telephone number spoofing
Another possible explanation is number spoofing.
Spoofing happens when a caller falsifies the telephone number shown on the recipient’s screen. This can make a call appear to come from a legitimate business, a familiar organisation or a UK number, even though the caller is somewhere else entirely. Consequently, the displayed number alone is not reliable proof of the call’s true origin.
A number associated with a legitimate network can therefore appear on a suspicious call without that network or its customer having made it. Establishing what happened requires investigation, rather than relying solely on the number displayed.
Importantly, spoofing is a possible explanation—not a reason to dismiss a complaint or assume that every reported call has the same cause.
We take complaints seriously
Our position is not simply that “we are the network, not the caller”. We recognise that telecommunications providers have responsibilities to help prevent the misuse of the numbers they supply where they can.
When concerns about a Core Telecom-associated number are brought to our attention, our team can investigate the information provided and examine relevant network records. Depending on the circumstances, appropriate action may include suspending a number while an investigation takes place.
We want people to feel comfortable reporting their concerns. You do not need to understand how telephone networks work, or prove that a number has been spoofed, before contacting us.
Our aim is to understand what happened and respond appropriately—not to minimise the experience of the person receiving the call.
How to report a concern
If you have received an unwanted or suspicious call involving a number associated with Core Telecom, please email [email protected] so our team can review it.
Please include the number displayed, the number that received the call, the date and approximate time, and a brief description of what happened. Details of what the caller said, the organisation they claimed to represent, and whether the calls have happened repeatedly are also helpful. Share these details privately with our team rather than posting your personal information publicly.
For UK recipients, registering with the free Telephone Preference Service can help reduce unsolicited live marketing calls, although it will not prevent every unwanted call.
If a caller asks for sensitive information or pressures you to act immediately, end the call. Contact the organisation independently using a trusted number rather than relying on the number the caller provides.
Our commitment
Core Telecom’s purpose is to support legitimate communication—not unwanted intrusion.
We stand firmly against nuisance calling and number misuse and have a zero-tolerance policy. We take complaints seriously, welcome information that helps us investigate concerns, and remain committed to the responsible use of our services.
If you have a concern about a call associated with a Core Telecom number, please tell us. Your report matters.
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