Do DNS Servers cache?

Paul T Laudenslager ( (no email) )
Tue, 7 Apr 1998 09:44:07 -0400

I've moved a few client websites over to another machine (NT4AS/IIS) on a
different subnet. I'm responsible for both the Primary and Secondary DNS
servers (NT4DNS) for these domains.

I've updated a few IP's on both the primary and secondary DNS's to point to
the new website locations. It works fine from the machines that use these
DNSs as their default DNS and I've verified them using nslookup.

My problem is...
I've tried bring up the 'new' sites from two other locations and it seems
they are still pointing to the old IP address. When I went into nslookup (it
defaulted to their own DNS servers - not mine), it reported the 'old' IP

Do other DNS servers cache IP's from remote domains? If so, how long can I
expect before the cache on these services to flush and update themselves?

Thanks in advance for your time and consideration.

Paul L.