Telerik site hacked ??

That link works fine for me.

[mention:011caad85a5545659f1a1aaf22be3887:e9ed411860ed4f2ba0265705b8793d05] thanks for the info.

It appears there is a  DNS issue at Telenet (major internet provider in Belgium), they return an incorrect dns for docs.telerik.com

dig @195.130.130.11 docs.telerik.com

; <<>> DiG 9.9.4-RedHat-9.9.4-38.el7_3.1 <<>> @195.130.130.11 docs.telerik.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11655
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;docs.telerik.com.              IN      A

;; ANSWER SECTION:
docs.telerik.com.       263     IN      A       141.8.225.76

;; Query time: 11 msec
;; SERVER: 195.130.130.11#53(195.130.130.11)
;; WHEN: Tue Mar 14 15:17:21 CET 2017
;; MSG SIZE  rcvd: 61