The Home Office has launched a call for evidence on anonymous access to UK telephone numbers and call routing for fraud. It aims to improve understanding of how criminals obtain telephone numbers and access call routing services by establishing themselves as telecommunications providers or exploiting existing providers, and to assess whether further proportionate safeguards are needed. It focuses on access to telephone numbers through allocation, sub-allocation and resale, as well as call routing and related technologies, and seeks evidence on weaknesses in identity verification, onboarding and commercial arrangements that may enable fraud. Building on existing measures, including Ofcom’s strengthened customer verification requirements and caller ID spoofing rules, the Telecoms Fraud Sector Charter and the Fraud Strategy 2026–29, the Home Office is seeking evidence on the scale and impact of these risks, possible regulatory, legislative and industry responses, international approaches and any unintended consequences of potential interventions. The call for evidence excludes messaging applications, encrypted platforms, fraud unrelated to telephone numbers or call routing, and the retail purchase of telephone numbers by individual consumers. The call for evidence will run until 7 October 2026.