diff --git a/Dockerfile b/Dockerfile
index 6866121..03693f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,6 +11,7 @@ ENV PYTHON_EGG_CACHE=/home/syncano/.python-eggs \
     GEOS_LIBRARY_PATH=/usr/lib/libgeos_c.so.1
 
 RUN set -ex \
+    && pip install --upgrade pip \
     && adduser -D -s /bin/bash syncano \
     && apk add --no-cache \
         bash \
diff --git a/apps/core/mixins/views.py b/apps/core/mixins/views.py
index bd0edfd..25df75d 100644
--- a/apps/core/mixins/views.py
+++ b/apps/core/mixins/views.py
@@ -156,7 +156,7 @@ def initial(self, request, *args, **kwargs):
                         obj = Cached(model, kwargs=lookup_kwargs).get()
                     else:
                         obj = model.objects.get(**lookup_kwargs)
-                except (ValidationError, ObjectDoesNotExist):
+                except (ValidationError, ObjectDoesNotExist, ValueError):
                     # If value is not valid for a field or model not found - raise an error
                     raise ModelNotFound(model)
             else:
diff --git a/apps/hosting/middleware.py b/apps/hosting/middleware.py
index 419fee7..af15a29 100644
--- a/apps/hosting/middleware.py
+++ b/apps/hosting/middleware.py
@@ -25,7 +25,7 @@ def __call__(self, request):
             except Instance.DoesNotExist:
                 raise Http404()
         else:
-            instance = host.split(settings.HOSTING_DOMAIN)[0]
+            instance = host.split('.')[0]
             # Check if we're dealing with: <prefix>--<instance_name>
             domain_data = instance.rsplit('--', 1)
             if len(domain_data) == 2:
diff --git a/apps/hosting/tasks.py b/apps/hosting/tasks.py
index cd39487..d6096f9 100644
--- a/apps/hosting/tasks.py
+++ b/apps/hosting/tasks.py
@@ -52,23 +52,31 @@ def validate_domain(self, domain):
             answers = resolver.query(domain, 'CNAME')
         except DNSException:
             # If domain has no CNAME and it's a root domain, check if CNAME flattening is used
-            try:
-                r = requests.get('http://{}/2a1b7ceb-2b7c-4bd2-a40f-8b021278f5ea/'.format(domain),
-                                 timeout=(1.0, 3.0), allow_redirects=False)
-                if r.status_code == requests.codes.ok and r.content == b'OK':
-                    return
-            except requests.RequestException:
-                pass
+            if domain.count('.') == 1:
+                try:
+                    r = requests.get('http://{}/2a1b7ceb-2b7c-4bd2-a40f-8b021278f5ea/'.format(domain),
+                                     timeout=(1.0, 3.0), allow_redirects=False)
+                    if r.status_code == requests.codes.ok and r.content.decode() == settings.LOCATION:
+                        return
+                except requests.RequestException:
+                    pass
             raise CNameNotSet()
 
-        # Check expected CNAME value
-        expected_cname = '{}{}.'.format(self.instance.name, settings.HOSTING_DOMAIN)
         if len(answers) != 1:
             raise WrongCName()
 
         cname = answers[0].target.to_unicode()
-        if cname != expected_cname and not re.match(r'^[a-z0-9-]+--%s$' % expected_cname, cname):
-            raise WrongCName()
+        self.validate_cname(cname)
+
+    def validate_cname(self, cname):
+        # Check expected CNAME value
+        expected_cnames = ['{}.{}{}.'.format(self.instance.name, settings.LOCATION, settings.HOSTING_DOMAIN)]
+        if settings.MAIN_LOCATION:
+            expected_cnames.append('{}{}.'.format(self.instance.name, settings.HOSTING_DOMAIN))
+        for expected_cname in expected_cnames:
+            if cname == expected_cname or re.match(r'^[a-z0-9-]+--%s$' % expected_cname, cname):
+                return
+        raise WrongCName()
 
     def run(self, hosting_pk, domain, **kwargs):
         hosting_qs = Hosting.objects.filter(pk=hosting_pk)
diff --git a/deploy/env/eu1.env b/deploy/env/eu1.env
index c353925..27bcc3b 100644
--- a/deploy/env/eu1.env
+++ b/deploy/env/eu1.env
@@ -11,7 +11,7 @@ DB_INSTANCES_NAME=syncano-instances
 DJANGO_SETTINGS_MODULE=settings.production
 GOOGLE_APPLICATION_CREDENTIALS=/secrets/storage/credentials.json
 GUI_ROOT_URL=https://dashboard.syncano.io
-HOSTING_DOMAIN=.eu1.syncano.site
+HOSTING_DOMAIN=.syncano.site
 INVITATION_SITE_URL=https://dashboard.syncano.io
 LEGACY_CODEBOX_ENABLED=false
 LOCATION=eu1