what are the limiting factors on "if you can get fttp"

[Btone]

where i live there is only one local cabinet ,

so all phone connections must be coming from it ?

now my road is a postcode boundary and when i check the post code on one side of it it says i can get fttp, but when i check the post code on the other side it says i can't ?

also is there a limited to the distance it can be run, as i've noticed as i work my way up the road one house can get fttp and the next one (about 100 meters further up the road) can't (both in the same post code)

 

[Btone]

Thanks