From prosperity here's the other Symantec AV update domain, liveupdate.symantecliveupdate.com, pending migration
There's still several hundred sites I can see sitting on Edgio - be interesting to see if Akamai really do turn off the taps on Wednesday or not, there's some proper Indiana Jones style migrations happening this week.
Quite a lot of the ones who've migrated have gone to Cloudflare, which must be a kick in the teeth for Akamai (having paid for the Edgio contracts).