const google.golang.org/grpc/internal/resolver/dns.defaultDNSSvrPort

2 uses

	google.golang.org/grpc/internal/resolver/dns (current package)
		dns_resolver.go#L63: 	defaultDNSSvrPort = "53"
		dns_resolver.go#L97: 	host, port, err := parseTarget(authority, defaultDNSSvrPort)