London-based wholesale telecoms provider ICUK faced a multi-day DDoS attack starting on Monday evening, initially targeting its core network and later its Control Panel app and infrastructure. The attack disrupted VoIP and web services, causing service delivery outages and preventing customers from accessing their control panels. While Cloudflare’s DDoS protection mitigated most attacks within hours, residual effects persisted, requiring an emergency restart of the VoIP platform the following evening. The company confirmed no data breaches, ransomware, or other compromises—only service disruptions due to DDoS traffic, including DNS amplification techniques. Business operations were partially affected, with some customers unable to use the Control Panel until after business hours on Tuesday. ICUK emphasized transparency in customer communications and implemented additional Cloudflare protections at the network layer. No financial losses, reputational damage beyond temporary service interruptions, or long-term consequences were reported. The attack was isolated to DDoS, with no evidence of data theft, system infiltration, or broader cyber compromise.