: Additional rural communities integrated into the local postal route. Postal Infrastructure and Logistics
The Russian postal system uses a six-digit format where the first three digits (157) typically denote the regional hub or sorting center—in this case, part of the broader Kostroma regional network. The final three digits (234) pinpoint the specific post office or local delivery route. 157234 zip
: Smaller settlements that rely on the central sorting facilities linked to this index. : Additional rural communities integrated into the local