Now, however, I can't get through to my office from here... although I can get through just fine from various other places on the Internet that I can reach easily.
C:\Users\DougS>tracert -d 80.175.57.13 Tracing route to 80.175.57.13 over a maximum of 30 hops 1 8 ms 1 ms 1 ms 172.20.51.1 2 17 ms 11 ms 37 ms 10.159.60.1 3 10 ms 11 ms 8 ms 62.253.121.205 4 213.105.175.33 reports: Destination net unreachable. Trace complete.
I'm just wondering whether other people are having the same trouble.
[EDIT (12:10): Now fixed. Routing borked between about half-five and about eleven this morning.]
Can your ISP route?
I can ping 80.175.57.13 and get a reply
13(92.9%)
When I try to ping 80.175.57.13 the request times out
1(7.1%)
... and the name of my ISP is: