It is considers that "sunaparantha" is somewere in midlle east. following quats from pali thipitaka,

Saṃyutta Nikāya 35 -Connected Discourses on the Six Sense Bases - 88. Puṇṇa

“Now that you have received this brief exhortation from me, Puṇṇa, in which country will you dwell?”

“There is, venerable sir, a country named Sunaparanta. I will dwell there.”

https://suttacentral.net/en/sn35.88

Punna, I have advised you in short. Now in which state will you abide?”

“Venerable sir, now that I'm advised in short, I will abide in the Sunaparanta state.”

http://awake.kiev.ua/dhamma/tipitaka/2Sutta-Pitaka/2Majjhima-Nikaya/Majjhima3/145-punnovada-e.html

It is considers that "sunaparantha" is somewere in midlle east. following quats from pali thipitaka,

Saṃyutta Nikāya 35 -Connected Discourses on the Six Sense Bases - 88. Puṇṇa

“Now that you have received this brief exhortation from me, Puṇṇa, in which country will you dwell?”

“There is, venerable sir, a country named Sunaparanta. I will dwell there.”

In punnovada Sutta

Punna, I have advised you in short. Now in which state will you abide?”

“Venerable sir, now that I'm advised in short, I will abide in the Sunaparanta state.”