US-based network security firm Renesys registered Syria disappearing from the internet at 12:26pm local time (10:26 GMT).
“All 84 of Syria's IP address blocks have become unreachable, effectively removing the country from the internet,” reads Renesys’ blogpost.
The same was confirmed by Akamai Technologies Inc, another US-based company that distributes content on the internet.
Syrian state TV denied the blackout was nationwide. It said the outage was cause by a technical failure, only affected some provinces and that technicians were trying to fix the problem. The Syrian Information Ministry blamed "terrorists" for the outage, as reported by the broadcaster.