Any place which is not a רשות הרבים or a רשות היחיד

every street

any open place

any place that is 3 טפחים tall or more and less then 4 by 4 טפחים wide

any place that is 10 טפחים tall or more and less then 4 by 4 טפחים wide

Any place which is not a רשות הרבים or a רשות היחיד

most streets

a porch of a house

if one carries from there to a רשות הרבים then its only a מדרבנן

if one carries from there to a רשות הרבים then its OKAY and not forbidden at all

one can carry in a מקום פטור

if one carries from there to a רשות היחיד then its only a מדרבנן

That is why we have an eruv

there is a passuk that makes that exception

its considered part of you/negligible to you so not considered carrying

any private property

any private property that is enclosed by walls

any property which is not a רשות הרבים and is enclosed

only a residential building (like a house)

if there is an eruv in city

if you made an עירוב חצירות in the building

in a building is enclosed so this is good to all

if its for a mitzva or great need

putting up poles and strings to make צורת הפתח so that area is considered enclosed

renting the city from the gentiles

making an עירוב חצירות

all of the answers

in order to be considered carrying there must be a עקירה והנחה (picking up and putting down)

sometimes we will use me הלכה למשה מסיני of לבוד to help us consider something a wall

to be defined as a רשות הרבים it has to be 16 amos wide and many hold that there is some sort of need of 600000 people

there is a concept of גוד אסיק, which is a הלכה למשה מסיני that a wall of 10 טפחים can be considered to go straight up well past where wall ends

poles and strings dont make the wall good unless there is an eiruv chatzros

carrying from רשות היחיד to another רשות היחיד

carrying from רשות היחיד to a רשות הרבים or vice versa

carrying from רשות היחיד to a כרמלית or vice versa

carrying from a כרמלית to a רשות הרבים or vice versa

carrying in aרשות הרבים