Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + K+(out) + Cl-(out) = Na+(in) + K+(in) + Cl-(in).
Synonyms:
xref:
RHEA:72395; Reactome:R-HSA-5623588 "Defective SLC12A1 does not cotransport Na+, K+, 2Cl- from extracellular region to cytosol"; reactome:R-HSA-426086 "SLC12A1,2 cotransports Na+, K+, 2Cl- from extracellular region to cytosol"