Cisco Secure Access DNS Resolvers – Anycast IP Addresses
North America (USA-only) DNS resolvers guarantee only that DNS queries are resolved by a USA-based Secure Access data center. Block pages use global Anycast and may go to any data center, including one located outside of the USA.
IPv4 | IPv6 | Port/Protocol | Description |
---|---|---|---|
208.67.222.222 | 2620:119:35::35 | 53 TCP/UDP | Primary |
208.67.220.220 | 2620:119:53::53 | 53 TCP/UDP | Secondary |
208.67.220.222 | n/a | 53 TCP/UDP | Tertiary |
208.67.222.220 | n/a | 53 TCP/UDP | Quaternary |
208.67.221.76 | 2620:119:17::76 | 53 TCP/UDP | USA only Primary |
208.67.223.76 | 2620:119:76::76 | 53 TCP/UDP | USA only Secondary |