On Wed, 15 Sept 2021 at 06:38, Masataka Ohta < mo...@necom830.hpcl.titech.ac.jp> wrote:
> Shane Ronan wrote: > > > But in fact with local number portability, you cannot rely on the county > > code to tell you where to route a telephone call anymore. > > Not. With geographical aggregation, you may route a call > *anywhere* in the destination country. > You mean anywhere in the world. Calls to my number reach my cell phone no matter where I go. > > Number portability database is looked up after the call > reaches the destination country, which will be used for > further intra-national routing, which do not affect > country-wise aggregation of international routing table. > > Actually the GSM system will query the HLR to find out where to really route the call. Much like LISP actually. Regards, Baldur
