| Native name | رگ |
|---|---|
| Country | Iran |
| Province | South Khorasan |
| County | Khusf |
| Bakhsh | Jolgeh-e Mazhan |
| Rural District | Qaleh Zari |
| Population as of | 2006 |
| Population total | 23 |
| Time zone | IRST (UTC+3:30) |
| Time zone (DST) | IRDT (UTC+4:30) |
| Coordinates | 32°20′08″N 59°07′14″E |
Reg (Persian: رگ, also Romanized as Rek; also known as Rak, Riqq, and Rīqqah)[1] is a village in Qaleh Zari Rural District, Jolgeh-e Mazhan District, Khusf County, South Khorasan Province, Iran. As of the 2006 census, its population was 23 in 13 families.[2]