diff --git a/src/Core/Utilities/CoreHelpers.cs b/src/Core/Utilities/CoreHelpers.cs
index c263ccdbe1..abb3aa0612 100644
--- a/src/Core/Utilities/CoreHelpers.cs
+++ b/src/Core/Utilities/CoreHelpers.cs
@@ -76,6 +76,39 @@ public static class CoreHelpers
         return new Guid(guidArray);
     }
 
+    internal static DateTime DateFromComb(Guid combGuid)
+    {
+        var guidArray = combGuid.ToByteArray();
+        var daysArray = new byte[4];
+        var msecsArray = new byte[4];
+
+        Array.Copy(guidArray, guidArray.Length - 6, daysArray, 2, 2);
+        Array.Copy(guidArray, guidArray.Length - 4, msecsArray, 0, 4);
+
+        Array.Reverse(daysArray);
+        Array.Reverse(msecsArray);
+
+        var days = BitConverter.ToInt32(daysArray, 0);
+        var msecs = BitConverter.ToInt32(msecsArray, 0);
+
+        var time = new TimeSpan(days, 0, 0, 0, (int)(msecs * 3.333333));
+        return new DateTime(_baseDateTicks + time.Ticks, DateTimeKind.Utc);
+    }
+
+    internal static double BinForComb(Guid combGuid, int binCount)
+    {
+        // From System.Web.Util.HashCodeCombiner
+        uint CombineHashCodes(uint h1, byte h2)
+        {
+            return (uint)(((h1 << 5) + h1) ^ h2);
+        }
+        var guidArray = combGuid.ToByteArray();
+        var randomArray = new byte[10];
+        Array.Copy(guidArray, 0, randomArray, 0, 10);
+        var hash = randomArray.Aggregate((uint)randomArray.Length, CombineHashCodes);
+        return hash % binCount;
+    }
+
     public static string CleanCertificateThumbprint(string thumbprint)
     {
         // Clean possible garbage characters from thumbprint copy/paste
diff --git a/test/Core.Test/Utilities/CoreHelpersTests.cs b/test/Core.Test/Utilities/CoreHelpersTests.cs
index af11567989..ac02234e34 100644
--- a/test/Core.Test/Utilities/CoreHelpersTests.cs
+++ b/test/Core.Test/Utilities/CoreHelpersTests.cs
@@ -71,6 +71,31 @@ public class CoreHelpersTests
         Assert.Equal(expectedComb, comb);
     }
 
+    [Theory]
+    [MemberData(nameof(GenerateCombCases))]
+    public void DateFromComb_WithComb_Success(Guid inputGuid, DateTime inputTime)
+    {
+        var comb = CoreHelpers.GenerateComb(inputGuid, inputTime);
+        var inverseComb = CoreHelpers.DateFromComb(comb);
+
+        Assert.Equal(inputTime, inverseComb, TimeSpan.FromMilliseconds(4));
+    }
+
+    [Theory]
+    [InlineData("00000000-0000-0000-0000-000000000000", 1, 0)]
+    [InlineData("00000000-0000-0000-0000-000000000001", 1, 0)]
+    [InlineData("00000000-0000-0000-0000-000000000000", 500, 430)]
+    [InlineData("00000000-0000-0000-0000-000000000001", 500, 430)]
+    [InlineData("10000000-0000-0000-0000-000000000001", 500, 454)]
+    [InlineData("00000000-0000-0100-0000-000000000001", 500, 19)]
+    public void BinForComb_Success(string guidString, int nbins, int expectedBin)
+    {
+        var guid = Guid.Parse(guidString);
+        var bin = CoreHelpers.BinForComb(guid, nbins);
+
+        Assert.Equal(expectedBin, bin);
+    }
+
     /*
     [Fact]
     public void ToGuidIdArrayTVP_Success()