So i did some digging around just to check up on what i said above.. this link contains some info, definitely shouldnt be able to bind in sebilis. but i also remember not being able to bind in lower guk on a caster (i remember my brother was bound there, then after they ninja-nerfed bind, he never re-bound and was one of the only ppl left with a bind in guk). anyway, here is wayback link to EQ atlas bind guide:
http://web.archive.org/web/200104280...bindguide.html
note that it is wrong about the velious binds though. they get better here:
http://web.archive.org/web/200112170...bindguide.html. but still not complete. also a check in the future of the bind guide shows they stopped updating it as of the link i provide here
some ppl mention how bind works across different eras/continents, and also binding in skyshrine and kael, here:
http://www.eqclerics.org/forums/showthread.php?t=5470.
also, some ppl claimed that on different servers there were different zones/areas that were bindable