diff --git a/extra/msft-public-ips.csv b/extra/msft-public-ips.csv
new file mode 100644
index 00000000..84b11c14
--- /dev/null
+++ b/extra/msft-public-ips.csv
@@ -0,0 +1,386 @@
+Prefix,Type
+1.186.0.0/16, MSFT Public IP Address Block
+4.128.0.0/12, MSFT Public IP Address Block
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