The country code and area code of Winterswijk, Netherlands is 31, (0)543.
The country code and area code of Chakwal, Pakistan is 92, (0)543.
The country code and area code of Tambul, Sudan is 249, (0)543.
The country code and area code of Binzhou- SD, China is 86, (0)543.
The country code and area code of Ihara District- Shizuoka, Japan is 81, (0)543.
If you are referring to telephone country codes, then there is no country with code 543. Within Agentina (country code 54), if the next digit is a 3, ie you have dialled +543, then further digits dialled will give a number in: +54 30 - a mobile phone +54 32 - a mobile phone +54 33 - a mobile phone +54 341 - Rosario +54 342 - Santa Fe +54 351 - Cordoba +54 352 - Cordoba +54 361 - Mendoza +54 3627 - San Rafael +54 364 - San Juan +54 3722 - Resistenci +54 3752 - Posadas +54 3783 - Corrientes
543 849 1792
543
543
543 is not prime. 543 = 3 * 181
543
543