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How to pad IP address with zero in Excel?

When receiving a sheet which contains some IP addresses with two digits in some segments, you may want to pad the IP address with zero to three digits in every segment as below screenshot shown. In this article, I introduce some tricks to quickly pad IP address in Excel.
doc pad ip with zero 1

Pad IP address with zero by formula

Pad IP address with zero by Defined Function

Pad IP address with zero by formula

Here is a long formula that can help you quickly pad IP address with zero.

Select a blank cell, type this formula,


A1 is the IP address you use, press Enter key, drag fill handle down to the cells needed this formula. see screenshot:

doc pad ip with zero 2
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doc pad ip with zero 3

Pad IP address with zero by Defined Function

If you are familiar with VBA code, here is a code that can also help you to pad IP address.

1. Press Alt + F11 keys to enable Microsoft Visual Basic for Applications window, click Insert > Module to create a new module. See screenshot:
doc pad ip with zero 4

2. In the Module script, paste below code to it, and then save the code and close the VBA window. See screenshot:

VBA: Pad IP Address

Function IP(Txt As String) As String
    Dim xList As Variant
    Dim I As Long
    xList = Split(Txt, ".")
    For I = LBound(xList) To UBound(xList)
        xList(I) = Format(xList(I), "000")
    IP = Join(xList, ".")
End Function

doc pad ip with zero 5

3. Go to a blank cell which you will place the calculated result, type this formula =IP(A1), press Enter key, and drag fill handle down to the cells you need. See screenshot:

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The Excel equation above has a flaw that will yield incorrect padded IPv4s in some circumstances. Use this instead:
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