diff --git a/shuffle-tools/1.2.0/api.yaml b/shuffle-tools/1.2.0/api.yaml
index cfa1a55b..66704dd8 100644
--- a/shuffle-tools/1.2.0/api.yaml
+++ b/shuffle-tools/1.2.0/api.yaml
@@ -955,6 +955,19 @@ actions:
     returns:
       schema:
         type: string
+  - name: list_cidr_ips
+    description: Lists the IPs for a CIDR 
+    parameters:
+      - name: cidr 
+        description: IP CIDR to check
+        multiline: false
+        example: "1.1.1.0/24"
+        required: True
+        schema:
+          type: string
+    returns:
+      schema:
+        type: string
   - name: cidr_ip_match
     description: Check if an IP is contained in a CIDR defined network
     parameters:
diff --git a/shuffle-tools/1.2.0/src/app.py b/shuffle-tools/1.2.0/src/app.py
index 03019ed7..2708309c 100644
--- a/shuffle-tools/1.2.0/src/app.py
+++ b/shuffle-tools/1.2.0/src/app.py
@@ -2654,6 +2654,44 @@ def parse_ioc_new(self, input_string, input_type="all"):
             return "Failed to parse IOC's: %s" % e
 
         return newarray
+
+    def list_cidr_ips(self, cidr):
+        defaultreturn = {
+            "success": False,
+            "reason": "Invalid CIDR address"
+        }
+
+        if not cidr:
+            return defaultreturn
+
+        if "/" not in cidr:
+            defaultreturn["reason"] = "CIDR address must contain / (e.g. /12)"
+            return defaultreturn
+
+        try:
+            cidrnumber = int(cidr.split("/")[1])
+        except ValueError as e:
+            defaultreturn["exception"] = str(e)
+            return defaultreturn
+
+        if cidrnumber < 12:
+            defaultreturn["reason"] = "CIDR address too large. Please stay above /12"
+            return defaultreturn
+
+        try:
+            net = ipaddress.ip_network(cidr)
+        except ValueError as e:
+            defaultreturn["exception"] = str(e)
+            return defaultreturn
+
+        ips = [str(ip) for ip in net]
+        returnvalue = {
+            "success": True,
+            "amount": len(ips),
+            "ips": ips
+        }
+
+        return returnvalue
     
 
 if __name__ == "__main__":