You Do Need power plug adapter while traveling from Somaliland to Iran.

Here is Why You Need An Adapter

The outlet and plug type used in Iran are C and F and in Somaliland is G. This is how they look like.

Somaliland

In Somaliland, outlets of type G are in use.

Type G

Iran

In Iran, outlets of type C and F are in use.

Type C

Type F