Ignoring the fact that Akamai IPv6 is broken on random nodes, thus you get either a working response or not from the same IP as some of the nodes are borked and thus just hang the connection.. (could be pmtu, hard to say without peeking inside the cluster).... see amongst others: https://www.sixxs.net/forum/?msg=general-12378937 But on a non-IPv4 note for once, I just noticed this funny one: $ telnet -4 www.akamai.com 80 Trying 95.101.216.85... Connected to e8921.dscx.akamaiedge.net. Escape character is '^]'. GET /html/technology/nocc.html HTTP/1.1 Host: www.akamai.com HTTP/1.1 302 Moved Temporarily Content-Length: 153 Content-Type: text/html Location: /esi/ui/html_head.html Location: /esi/ui/header.html Location: /esi/ui/technology-nav.html Location: /esi/ui/footer.html Location: /esi/ui/footer_js.html Location: /esi/webtrends.html Location: /esi/google-tag-manager.html Set-Cookie: cm_sessionid=47d4fed5001b00007c7457540ff80400b7650000; path=/ Set-Cookie: x_hd= Set-Cookie: x_hd= Set-Cookie: x_hd= Set-Cookie: x_hd= Set-Cookie: x_hd= Set-Cookie: x_hd= Set-Cookie: x_hd= ETag: "4c08f-206b-50353850ddb40" Cache-Control: max-age=70369 Date: Mon, 03 Nov 2014 12:26:36 GMT Connection: keep-alive <HTML> <HEAD> <TITLE>Error Page</TITLE> </HEAD> <BODY> An error (302 Moved Temporarily) has occured in response to this request. </BODY> </HTML> Connection closed by foreign host. Multiple Location: headers, really? and for head/footer/etc? Really? :) Chrome reports: --- Error code: ERR_RESPONSE_HEADERS_MULTIPLE_LOCATION --- Firefox: --- Corrupted Content Error The page you are trying to view cannot be shown because an error in the data transmission was detected. --- Note the irony in googling for Akamai NOC and getting such a page. I think there are a couple of b0rked nodes in the cluster that is attempting to serve me... Greets, Jeroen