It was unavailable for 5 hours today. I first noticed it right after 10:00am. Here is the traceroute:

205.205.57.4 is from Canada(CA) in region North America

TraceRoute to 205.205.57.4 [www.levelextreme.com]

Hop (ms) (ms) (ms)  IP Address Host name 
1 28 22 11  72.249.0.65 - 
2 26 22 23  8.9.232.73 te-3-4.car1.dallas1.level3.net 
3 44 55 29  4.68.19.193 ge-6-1-0-99.bbr1.dallas1.level3.net 
4 26 18 13  209.244.15.162 so-6-0-0.edge1.dallas1.level3.net 
5 22 19 17  4.68.63.218 - 
6 40 16 16  152.63.98.66 0.so-0-0-0.xl3.dfw13.alter.net 
7 63 53 64  152.63.2.90 0.so-7-1-0.xt1.mtl1.alter.net 
8 60 57 64  152.63.133.46 0.so-3-0-0.xr1.mtl1.alter.net 
9 70 61 72  152.63.130.65 193.atm7-0.gw1.mtl2.alter.net 
10 59 63 68  216.95.146.106 transfo4-gw.customer.alter.net 
11 63 53 56  205.205.57.4 - 

Trace complete

------------------------------------------------------------------------------------------------------
Here it is now that it is back up:

205.205.57.4 is from Canada(CA) in region North America


TraceRoute to 205.205.57.4 [www.levelextreme.com]

Hop (ms) (ms) (ms)  IP Address Host name 
1 18 18 7  72.249.0.65 - 
2 6 17 13  8.9.232.73 te-3-4.car1.dallas1.level3.net 
3 13 13 10  4.68.19.193 ge-6-1-0-99.bbr1.dallas1.level3.net 
4 9 11 11  209.244.15.162 so-6-0-0.edge1.dallas1.level3.net 
5 17 30 8  204.255.169.25 0.so-2-0-0.br1.dfw13.alter.net 
6 14 22 10  152.63.98.66 0.so-0-0-0.xl3.dfw13.alter.net 
7 51 49 49  152.63.2.90 0.so-7-1-0.xt1.mtl1.alter.net 
8 51 55 49  152.63.133.46 0.so-3-0-0.xr1.mtl1.alter.net 
9 53 52 65  152.63.130.65 193.atm7-0.gw1.mtl2.alter.net 
10 62 54 60  216.95.146.106 transfo4-gw.customer.alter.net 
11 66 50 57  205.205.57.4 - 

Trace complete