Voip Unlimited

Voip Unlimited operates as a United Kingdom‑based provider of Voice over Internet Protocol services, delivering voice calling and short message service capabilities to its customers. The company relies on Session Initiation Protocol infrastructure to route calls over IP networks, positioning it within the broader telecommunications sector as a VoIP operator. Its core offering enables businesses and consumers to replace traditional telephony lines with internet‑based communication, supporting features such as call forwarding, voicemail, and conferencing. By focusing on IP‑based voice transport, Voip Unlimited serves markets that require scalable and cost‑effective telephony solutions. The firm’s service portfolio is aimed at customers seeking alternatives to legacy circuit‑switched networks, particularly those valuing flexibility and integration with other IP applications. As a SIP‑centric provider, its technical expertise lies in managing signalling and media streams for real‑time voice traffic.

In August 2021, Voip Unlimited was identified as one of the UK VoIP operators that sustained distributed denial‑of‑service attacks linked to the REvil ransomware gang, an incident that caused intermittent or total loss of connectivity for voice and SMS services while broadband remained largely unaffected. The attack unfolded over a bank holiday weekend and persisted intermittently, prompting customer frustration after the holiday period. The UK Comms Council issued an alert to its members, describing the coordinated assault on multiple SIP providers as organized criminal activity and urging heightened vigilance. Law‑enforcement agencies were notified, and mitigation efforts were undertaken, although the attackers’ persistence continued to pose risks to service stability. This episode highlights Voip Unlimited’s exposure to sophisticated cyber threats targeting telecommunications infrastructure and underscores the importance of robust DDoS defences for VoIP operators.