T-Mobile-USA network provider: all IP-addresses, address range, subnets. Sprint Relay POP Baltimore USA, determine the actual location by IP-address (address of the provider T-Mobile-USA) (site ), location of AS0 (ISP hoster).
Service for getting the site location or IP-address: ISP provider, organization, country, region, city, range (network) of IP addresses. Additional tools (Ping check, HTTP check) allow you to test availability of IP address (site) from various points around the world in real time.