Large Cache
OpenDNS is faster is because we run some of the largest DNS caches around and do it on our own high-performance network, running our own software. We can hold tens of millions of records and zones in local cache, saving you the extra round-trips to find the addresses.
OpenDNS gets better as our user base grows. Why? Our caches are really big. The more people using OpenDNS, the more addresses our caches are holding at any given time.
Control the cache with CacheCheck
With CacheCheck, you can check what OpenDNS customers see when they request a domain. If there's something amiss, you may refresh OpenDNS's cache for that domain. This unique utility is intended primarily to serve domain owners, but it's also insight for all OpenDNS customers.
OpenDNS never caches domains beyond the limit of the TTL (Time To Live) settings. TTL is set by the domain owner and tells servers how long they may cache the resolved location before asking the authoritative nameservers once again where the domain points. OpenDNS caches are large enough to hold domains until the TTL expiration in most cases.
