I have a broadband connection from a national ISP. Since a few weeks, I'm not being able to connect to developer.apple.com or sign in to the App Store/Mac App Store/iTunes. I am able to browse apple.com perfectly and the App Stores work fine (everything shows up fine) until I try to download anything, which just makes the downloading circle spin momentarily in iOS and hangs App Store.app on OS X.
People living in the same city who have a broadband connection from the same ISP are having the same problem and some are even switching to satellite connections. I'm forced to use a public VPN every time I need to download an app or browse the documentation in developer.apple.com.
developer.apple.com resolves to 17.146.1.15 for me which is correct (Apple owns the 17.0.0.0/8 IP address block)
The last two lines of `traceroute 17.146.1.15` are:
ae-2-70.edge8.sanjose1.level3.net (4.69.152.84) 511.946 ms 386.713 ms
209.244.104.134 (209.244.104.134) 410.042 ms 452.702 ms 511.376 ms