diff --git a/v3/public-resolvers.md b/v3/public-resolvers.md
index 3c2d2e56..3d55ed23 100644
--- a/v3/public-resolvers.md
+++ b/v3/public-resolvers.md
@@ -348,6 +348,17 @@ address when forwarding them to a selection of companies and organizations.
 sdns://AQEAAAAAAAAADjIwOC42Ny4yMjAuMjIwILc1EUAgbyJdPivYItf9aR6hwzzI1maNDL4Ev6vKQ_t5GzIuZG5zY3J5cHQtY2VydC5vcGVuZG5zLmNvbQ
 
 
+## cisco-sandbox
+
+Cisco OpenDNS Sandbox (anycast) - RFC-compliant DNS service without filtering
+
+dnssec/log/no-filter/ecs 146.112.41.4
+
+Warning: This server is incompatible with anonymization.
+
+sdns://AQUAAAAAAAAADDE0Ni4xMTIuNDEuNCC3NRFAIG8iXT4r2CLX_WkeocM8yNZmjQy-BL-rykP7eRsyLmRuc2NyeXB0LWNlcnQub3BlbmRucy5jb20
+
+
 ## cisco-doh
 
 Remove your DNS blind spot (DoH protocol)