Analysis of information sources in references of the Wikipedia article "Sura Kingdom" in Simple English language version.
According to Mahābhārata (IX.36.1) Śūra lived in the region of Vinasana, in the vicinity of Abhiras (tato vinaśanam rājanājagāma halāyudhaḥ śūrābhirān prati dveṣād yatra naṣṭā sarasvatī).