diff --git a/planetstack/core/api/subnets.py b/planetstack/core/api/subnets.py
new file mode 100644
index 0000000..d618eda
--- /dev/null
+++ b/planetstack/core/api/subnets.py
@@ -0,0 +1,74 @@
+import commands
+from types import StringTypes
+from openstack.client import OpenStackClient
+from openstack.driver import OpenStackDriver
+from core.api.auth import auth_check
+from core.models import Subnet
+from core.api.slices import _get_slices
+
+
+def _get_subnets(filter):
+    if isinstance(filter, StringTypes) and filter.isdigit():
+        filter = int(filter)
+    if isinstance(filter, int):
+        subnets = Subnet.objects.filter(id=filter)
+    elif isinstance(filter, StringTypes):
+        # the name is the subnet's slice's name
+        slices = _get_slices(filter)
+        slice = None
+        if slices: slice=slices[0]
+        subnets = Subnet.objects.filter(slice=slice)
+    elif isinstance(filter, dict):
+        subnets = Subnet.objects.filter(**filter)
+    else:
+        subnets = []
+    return subnets
+
+def add_subnet(auth, fields):
+    driver = OpenStackDriver(client = auth_check(auth))
+    slices = _get_slices(fields.get('slice')) 
+    if slices: fields['slice'] = slices[0]     
+    subnet = Subnet(**fields)
+    # create quantum subnet
+    quantum_subnet = driver.create_subnet(name= subnet.slice.name,
+                                          network_id=subnet.slice.network_id,
+                                          cidr_ip = subnet.cidr,
+                                          ip_version=subnet.ip_version,
+                                          start = subnet.start,
+                                          end = subnet.end)
+    subnet.subnet_id=quantum_subnet['id']
+    ## set dns servers
+    #driver.update_subnet(subnet.id, {'dns_nameservers': ['8.8.8.8', '8.8.4.4']})
+
+    # add subnet as interface to slice's router
+    try: driver.add_router_interface(subnet.slice.router_id, subnet.subnet_id)
+    except: pass         
+    #add_route = 'route add -net %s dev br-ex gw 10.100.0.5' % self.cidr
+    commands.getstatusoutput(add_route)    
+    subnet.save()
+    return subnet
+
+def update_subnet(auth, subnet, **fields):
+    return  
+
+def delete_subnet(auth, filter={}):
+    driver = OpenStackDriver(client = auth_check(auth))   
+    subnets = Subnet.objects.filter(**filter)
+    for subnet in subnets:
+        driver.delete_router_interface(subnet.slice.router_id, subnet.subnet_id)
+        driver.delete_subnet(subnet.subnet_id) 
+        subnet.delete()
+        #del_route = 'route del -net %s' % subnet.cidr
+    commands.getstatusoutput(del_route)
+    return 1
+
+def get_subnets(auth, filter={}):
+    client = auth_check(auth)
+    if 'slice' in filter:
+        slice = _get_slice(filter.get('slice'))
+        if slice: filter['slice'] = slice
+    subnets = Subnet.objects.filter(**filter)
+    return subnets             
+        
+
+