Sodium-independent sulfate anion transporter (PubMed:12713736, PubMed:27125215). Can transport other anions including bicarbonate, thiosulfate and oxalate by mediating sulfate- thiosulfate, sulfate-hydrogencarbonate and sulfate-oxalate anion exchange (PubMed:12713736, PubMed:27125215). Mediates oxalate- hydrogencarbonate anion exchange (By similarity). {ECO:0000250|UniProtKB:P58735, ECO:0000269|PubMed:12713736, ECO:0000269|PubMed:27125215}. This is the function of Ensembl gene identifier ENSG00000145217 (SLC26A1, solute carrier family 26 member 1).