Following on from a recent wave of civil unrest after an unexpected and unwelcome fuel price rise internet connectivity into and out of Iran was shut off and remains so at this time.
The details are sketchy on what has been done and why but it is likely the Iranian Govt has taken this action to prevent unrest being created and organised via social media platforms/services.
The disconnection still allows citizens to use internal country wide facilities and web sites but anything outside the country is effectively blocked, this is the same system Russia and China operate to control domestic unrest when it suits them however theres an economic cost to this activity and so this is likely to be simply a warning to Iranian citizens not to get involved in protests.
Let us hope our fellow netizens are reconnected with us soon eh folks, national borders and divisive rhetoric can be so annoying at times.
Get more specific data on this blackout from here folks https://netblocks.org/reports/internet-disrupted-in-iran-amid-fuel-protests-in-multiple-cities-pA25L18b