How to wait for a co routine to finish when calling from a method

I need to parse some string's to int's, but this is pretty slow. I am also doing it for a fairly large amount of strings, and I have to split the strings too. So I put that whole process into a co routine in order to avoid frame drops.

I don't think this is a duplicate question because I said : "I haven't found a better way to do it that doesn't involve 2 co-routines. "

Here is my code right now:

     public IEnumerator ParseIPv4(string ipToCheck)
     {
     // Let everyone know that our parse is not done yet
     parseComplete = false;

     // Break out of the 
     if (ipToCheck == null) yield break;

     // Two variables the make sure that what we parse is actually an integer
     bool check;
     int x;

     // Split the IP address at periods first
     stringValues = ipToCheck.Split('.');

     // Make an integer array that has the same length as what we split
     tempIntValues = new int[stringValues.Length];
     
     // Loop through the string array and parse the strings to integers
     for(int i = 0; i < stringValues.Length; i++)
     {
         // Parse string to int, storing what I get the in integer array
         check = int.TryParse(stringValues[i], out x);

         // If what we parsed is an integer and it worked:
         if (check)
         {
             // Set the value in the integer array
             tempIntValues[i] = x;
         }
         else
         {
             // What we parsed was not an int, return false
             Debug.Log("This is not an integer!!");
             yield break;
         }

         // Make it so that the loop waits for the end of the frame 
         yield return null;
     }

     // Let everyone know that the parse is complete
     parseComplete = true;
 }

 public bool CheckIPv4(string IpAddress)
 {
     // Start to parse the string to ints
     StartCoroutine(ParseIPv4(IpAddress));

     // Wait for the chceking to be done
     while (!parseComplete)
     {
         print("We are checking this IP!  " + Time.deltaTime);
     }

     // Now we can move on to do other stuffs
     
 }

I am wondering if this is a good way to do this, or if it would be better to make the "CheckIPv4" method a co-routine as well. The reason that I did NOT do that right now is because I don't want to allocate a whole bunch of memory. This is a class that will be used on multiple objects, so it could end up being a lot if I double the amount of co-routines.

What I want to know is if this is a good way of doing this or not, it feels sloppy to me, but I haven't found a better way to do it that doesn't involve 2 co-routines.

If I am totally wrong about the memory of co-routines, then tell me.