Hello Nag,
If you need to sync your SRM system with ECC for country codes, region codes etc, open the customizing node in SAP IMG(SPRO) in SRM system, and click on Utilities in Menu.
Click on Adjustment option and follow instructions on the popup.
Once you have done the adjustment in SRM Dev, the same can be transported to QA and Prod.
Let me know if this answers your question.
Regards,
Sushil.