They called out to ask if Simon called Peter was staying there.
Cornelius had received positive orders from heaven to send for Peter, whom otherwise he had not heard of, or at least not heeded; but here is another difficulty that lies in the way of bringing them together - the question is whether Peter will come to Cornelius when he is sent for; not as if he thought it below him to come at a beck...
Commenting on Acts 10:9-18
And called, and asked,.... That is, they called to the people of the house, Simon's family; and in a civil and courteous manner asked them, whether Simon, which was surnamed Peter; which they said to distinguish him from Simon the master of the house, and as Cornelius was directed, and they were instructed by him: concerning him they inquired, whether he were lodged there; the...