That is an excellent question. I'm sorry but the answer is "it depends".

Even with the same provider, you can never be sure that level 3 is the same thing. For one lookup level 3 may be state for an other lookup it may be city.

But yes, it should be documented better.

Shit, that's what I was afraid about :P
But good to know that I can do "whatever I want to" with it ! :D

I suppose 1 is the "bigger" (like country) and 5 is the smaller (like "neighborhood") or is it the other way around ?

I think it is the other way around.
1- neigbourhood
2-
3-
4-
5- County

And of course. Sometimes you may only have 1-3.

Okay, I'll have a look to some other providers and do "something similar" with mine ! 👍

Thanks !

Great.
If you don't mind, could you add a row or two about this in the documentation?

I do not mind !
I'll submit a PR in the next few days ! Do not hesitate to ping me if I forget 😂

I found Google Maps API documentation about this : https://developers.google.com/maps/documentation/geocoding/intro#Types.

administrative_area_level_1
indicates a first-order civil entity below the country level. Within the United States, these administrative levels are states. Not all nations exhibit these administrative levels. In most cases, administrative_area_level_1 short names will closely match ISO 3166-2 subdivisions and other widely circulated lists; however this is not guaranteed as our geocoding results are based on a variety of signals and location data.

administrative_area_level_2
indicates a second-order civil entity below the country level. Within the United States, these administrative levels are counties. Not all nations exhibit these administrative levels.

administrative_area_level_3
indicates a third-order civil entity below the country level. This type indicates a minor civil division. Not all nations exhibit these administrative levels.

administrative_area_level_4
indicates a fourth-order civil entity below the country level. This type indicates a minor civil division. Not all nations exhibit these administrative levels.

administrative_area_level_5
indicates a fifth-order civil entity below the country level. This type indicates a minor civil division. Not all nations exhibit these administrative levels.

I guess we can base our documentation on this !

Sure. That seams reasonable.

This issue is related to #856

ping @jbelien, seems you forgot 😜

Happy to have a go if you want instead.

Haha, thanks for the reminder!
It indeed slipped of my mind.
I'll take care of it ASAP :)