All IP addresses of Her Majesty's Revenue and Customs
All IP ranges of all Internet Service Providers (ISPs) and organizations with dedicated IP ranges.
Link to your report: https://w-e-b.site/?act=report&id=b0f3e49d3e68e365ad4ff7f0d081b4c0All IP ranges of Her Majesty's Revenue and Customs
163.171.0.0/18