I have a client with domain www.tirian.org who reports 1 in 10 times he sits down he can't connect to his site out of the country. It has happened in Nepal, Thailand, and Costa Rica. The problem will clear up in 10-30 minutes.
However, the really perplexing part is that in these cases he CAN connect using his IP address.
But, when I entered www.tirian.org into the dnscheck tool it shows no problems with resolution.
I had him do a tracert while it was not resolving:
C:\>tracert www.tirian.org
Unable to resolve target system name www.tirian.org.
C:\>tracert 69.61.15.130
Tracing route to 69.61.15.130 over a maximum of 30 hops
1 3450 ms 3546 ms 3422 ms bkk-ras777-n1.ksc.net.th
[203.107.130.171]
2 3639 ms 3843 ms 3375 ms alteon-b1.ksc.net.th [203.107.130.189]
3 4061 ms 2734 ms 2562 ms ge800.bbr-bkkbt11.ksc.net.th [203.195.105.21]
4 3107 ms 3234 ms 2734 ms ge800.bbr-bkkbt11.ksc.net.th [203.195.105.21]
5 2029 ms 1999 ms 2405 ms 134.159.124.217
6 3406 ms * 3688 ms i-5-7.tmhstcbr01.net.reach.com [202.84.249.213]
7 * * * Request timed out.
8 * 2765 ms * btn1-RFE.hkix.net [202.40.161.175]
9 3979 ms 1906 ms 421 ms pos5-1.cr02.atl01.pccwbtn.net [63.218.22.38]
10 452 ms 421 ms 421 ms globalcompass.ge3-
0.3.cr02.atl01.pccwbtn.net [63.216.31.134]
11 3641 ms 3984 ms 3578 ms ge-1-atl1-cust1.globalcompass.com [66.154.95.221]
12 3465 ms 3202 ms 3250 ms 69.61.15.130
