the problem seems to be in the level3/cenic/losnettos path.

juniper -ge- gsr -ge- foundary -ge- foundary -ge- foundary -100m- 7513

the IP path is:

juniper - 7513

more as we unearth the problems...

What I didn't mention in my original post is that this problem has existed, as far as I can see, since B was moved to a new address. Anyway - it seems things are fixed now. DNS lookup, traceroute and ping work from AS 2116 (source address 193.71.2.2) and AS 3307 (source address 194.19.15.2). There are still timeouts at the router hop before 130.152.181.66, which looks like it should be 67.30.130.66, traceroute'ing from 193.71.2.2 and 194.19.15.2: 13 so-10-0.hsa1.Tustin1.Level3.net (209.244.27.154) 188.092 ms so-9-0.hsa1.Tustin1.Level3.net (209.244.27.174) 188.118 ms 187.955 ms 14 * * * 15 130.152.181.66 (130.152.181.66) 177.112 ms 177.141 ms 177.202 ms and 13 so-11-0.hsa1.Tustin1.Level3.net (209.244.27.162) 188.861 ms 188.604 ms so-8-0.hsa1.Tustin1.Level3.net (209.244.27.166) 188.947 ms 14 * * * 15 130.152.181.66 (130.152.181.66) 187.970 ms 187.573 ms 187.399 ms The missing hop here is visible as 67.30.130.66 coming from 129.241.1.16 (AS 224). I'm not going to worry too much about the traceroute timeouts, even if it would be nice if that could also be fixed. The main point is that DNS lookups are now working as they should. Thanks! Steinar Haug, Nethelp consulting, sthaug@nethelp.no