Thanks for update on this! I am (still) on router myself, but might be of use to others.

Yay, command line scripts ftw. :) Saved to try later, thanks for sharing!

REM //NSLOOKUP batch check utility v1.0
REM //Author: Emin Akbulut eminakbulut@gmail.com
REM //Date: 03 June 2010
REM //This code is freeware
REM //Usage: Modify the DNS and host lists below, at line 23, then simply run the batch file.

SET timeout=5

IF “%1″ == “/check” GOTO loopit

:start
cls
if exist %0.log del %0.log > nul %2>nul
if exist %0.bat.log del %0.bat.log > nul %2>nul
echo —————————————
echo Starting… %date% %time:~0,8%
echo —————————————
echo Report created on %date% %time:~0,8% >> %0.log
REM %%A for DNS Servers list, %%B for target hosts to be checked
FOR %%A IN (195.175.39.39 195.175.39.40 8.8.8.8) DO FOR %%B IN (google.com yourdomain.com mail.yourdomain.com) DO CALL %0 /check %%A %%B

echo ————————————— >> %0.log
echo —————————————
echo Done. Press any key to examine the log file…
Pause > nul
start notepad “%~0.log”
GOTO done

:loopit
echo ————————————— >> %0.log
echo nslookup %3 %2
echo nslookup %3 %2 >> %0.log
nslookup -timeout=%timeout% %3 %2 >> %0.log 2>nul

:done

Good we have Google for that. :)

Good point! :) Can indeed come handy if DNS suddenly bites the dust but connection itself works. On other hand there are two fields for DNS for exactly this reason – so you can input different servers from the start.

PS Google just likes to show off, aren’t they :)

Guess most of these are US-based… Even if they have servers spread it’s not always easy to determine precise location and best server fit for specific location.