diff --git a/test_inventory_keys.py b/test_inventory_keys.py
index cd16cc7..3feb01b 100644
--- a/test_inventory_keys.py
+++ b/test_inventory_keys.py
@@ -5,7 +5,7 @@ from wif2ansible.inventory import generate_inventory
 class TestInventoryKeys(unittest.TestCase):
     def test_inventory_keys_are_hostnames(self):
         # Create a server with Ref, Hostname, IP
-        s1 = Server(reference="SERVER_REF_01", hostname="server01", ip_address="192.168.1.10", platform="windows")
+        s1 = Server(reference="SERVER_REF_01", hostname="server01", ip_addresses=["192.168.1.10"], platform="windows")
         
         # Create a flow matching this server
         f1 = Flow(flow_id="1", source_ip="192.168.1.10", destination_ip="10.0.0.1", ports=[80])
@@ -18,12 +18,12 @@ class TestInventoryKeys(unittest.TestCase):
         # Verify stricture
         hosts = inventory['all']['hosts']
         
-        # Key should be REFERENCE "SERVER_REF_01" (or hostname/ip fallback)
-        self.assertIn("SERVER_REF_01", hosts)
+        # Key should be HOSTNAME "server01" (prioritized over Ref)
+        self.assertIn("server01", hosts)
         self.assertNotIn("192.168.1.10", hosts)
         
         # Check variables
-        host_vars = hosts["SERVER_REF_01"]
+        host_vars = hosts["server01"]
         self.assertEqual(host_vars['ansible_host'], "192.168.1.10")
         self.assertEqual(host_vars['ansible_connection'], "winrm")
 
diff --git a/wif2ansible/excel_reader.py b/wif2ansible/excel_reader.py
index be59dcb..7bc546e 100644
--- a/wif2ansible/excel_reader.py
+++ b/wif2ansible/excel_reader.py
@@ -120,27 +120,24 @@ def read_servers(filename: str) -> Dict[str, Server]:
         plat = get_val(plat_idx) or 'unknown'
         
         # Parse Management IP
+        # Support multiple IPs
         ip_raw = get_val(ip_idx)
-        ip_addr = None
+        ip_list = []
         if ip_raw:
-            ips = parse_ip(ip_raw)
-            if ips:
-                ip_addr = ips[0]
+            ip_list = parse_ip(ip_raw)
                 
         # Parse Production IP
         prod_ip_raw = get_val(prod_ip_idx)
-        prod_ip_addr = None
+        prod_ip_list = []
         if prod_ip_raw:
-            ips = parse_ip(prod_ip_raw)
-            if ips:
-                prod_ip_addr = ips[0]
+            prod_ip_list = parse_ip(prod_ip_raw)
         
         s = Server(
             reference=ref, 
             hostname=final_hostname, 
             platform=plat,
-            ip_address=ip_addr,
-            production_ip=prod_ip_addr
+            ip_addresses=ip_list,
+            production_ips=prod_ip_list
         )
         servers[ref] = s
         
diff --git a/wif2ansible/inventory.py b/wif2ansible/inventory.py
index 0d82b95..6f4f700 100644
--- a/wif2ansible/inventory.py
+++ b/wif2ansible/inventory.py
@@ -18,10 +18,14 @@ def generate_inventory(servers: Dict[str, Server], flows: List[Flow]) -> Dict[st
     
     ip_to_server = {}
     for s in servers.values():
-        if s.ip_address:
-            ip_to_server[s.ip_address] = s
-        if s.production_ip:
-            ip_to_server[s.production_ip] = s
+        # Index all Management IPs
+        for ip in s.ip_addresses:
+            ip_to_server[ip] = s
+        
+        # Index all Production IPs
+        for ip in s.production_ips:
+            ip_to_server[ip] = s
+            
         # Also index by reference/hostname for DNS matches
         if s.reference:
              ip_to_server[s.reference.lower()] = s
@@ -62,7 +66,7 @@ def generate_inventory(servers: Dict[str, Server], flows: List[Flow]) -> Dict[st
         
         # Prepare host entry if new
         # We use the Hostname (from Server Name col) -> Reference (cleaned) -> IP match
-        host_key = server.hostname or server.reference or server.ip_address
+        host_key = server.hostname or server.reference or server.primary_ip
         
         if host_key not in inventory_hosts:
             host_vars = server.get_ansible_vars()
diff --git a/wif2ansible/models.py b/wif2ansible/models.py
index ef7ea6a..5d048de 100644
--- a/wif2ansible/models.py
+++ b/wif2ansible/models.py
@@ -5,8 +5,19 @@ from typing import List, Dict, Optional, Any
 class Server:
     reference: str
     hostname: str  # This might be same as reference
-    ip_address: Optional[str] = None
-    production_ip: Optional[str] = None
+    # Support multiple IPs per field (lists)
+    ip_addresses: List[str] = field(default_factory=list)
+    production_ips: List[str] = field(default_factory=list)
+    
+    # helper for compatibility/primary IP
+    @property
+    def primary_ip(self) -> Optional[str]:
+        return self.ip_addresses[0] if self.ip_addresses else None
+
+    @property
+    def primary_prod_ip(self) -> Optional[str]:
+        return self.production_ips[0] if self.production_ips else None
+
     platform: str = 'unknown' # e.g. 'Windows', 'Linux'
     
     def get_ansible_vars(self) -> Dict[str, Any]:
@@ -23,8 +34,8 @@ class Server:
              # Default ssh is usually fine, but being explicit doesn't hurt
              pass
         
-        if self.ip_address:
-            vars['ansible_host'] = self.ip_address
+        if self.primary_ip:
+            vars['ansible_host'] = self.primary_ip
             
         return vars