diff --git a/python/nav/alertengine/dispatchers/sms_dispatcher.py b/python/nav/alertengine/dispatchers/sms_dispatcher.py
index babc037db5..374d1df439 100644
--- a/python/nav/alertengine/dispatchers/sms_dispatcher.py
+++ b/python/nav/alertengine/dispatchers/sms_dispatcher.py
@@ -73,7 +73,6 @@ def get_fallback_message(self, alert, language, message_type):
 
     @staticmethod
     def is_valid_address(address):
-        if address.isdigit():
-            return True
-        else:
-            return False
+        if address.startswith("+"):
+            return address[1:].isdigit()
+        return address.isdigit()
diff --git a/tests/integration/web/alertprofiles_test.py b/tests/integration/web/alertprofiles_test.py
index 77491a16c5..d465ddb768 100644
--- a/tests/integration/web/alertprofiles_test.py
+++ b/tests/integration/web/alertprofiles_test.py
@@ -458,8 +458,10 @@ def test_alertprofiles_add_invalid_email_address_should_fail(client):
     assert "Not a valid email address." in smart_str(response.content)
 
 
-def test_alertprofiles_add_valid_phone_number_should_succeed(client):
-    """Tests that a valid phone number can be added"""
+def test_alertprofiles_add_valid_phone_number_without_country_code_should_succeed(
+    client,
+):
+    """Tests that a valid phone number without a country code can be added"""
     valid_phone_number = "47474747"
     sms = AlertSender.objects.get(name=AlertSender.SMS)
     url = reverse("alertprofiles-address-save")
@@ -476,6 +478,66 @@ def test_alertprofiles_add_valid_phone_number_should_succeed(client):
     assert f"Saved address {valid_phone_number}" in smart_str(response.content)
 
 
+def test_alertprofiles_add_valid_non_norwegian_phone_number_without_country_code_should_succeed(
+    client,
+):
+    """Tests that a valid phone number without a country code can be added"""
+    valid_phone_number = "02227661193"
+    sms = AlertSender.objects.get(name=AlertSender.SMS)
+    url = reverse("alertprofiles-address-save")
+    data = {
+        "address": valid_phone_number,
+        "type": sms.pk,
+    }
+    response = client.post(url, data=data, follow=True)
+    assert response.status_code == 200
+    assert AlertAddress.objects.filter(
+        type=sms,
+        address=valid_phone_number,
+    ).exists()
+    assert f"Saved address {valid_phone_number}" in smart_str(response.content)
+
+
+def test_alertprofiles_add_valid_phone_number_with_country_code_should_succeed(client):
+    """Tests that a valid phone number with a country code (+xx) can be added"""
+    valid_phone_number = "+4747474747"
+    sms = AlertSender.objects.get(name=AlertSender.SMS)
+    url = reverse("alertprofiles-address-save")
+    data = {
+        "address": valid_phone_number,
+        "type": sms.pk,
+    }
+    response = client.post(url, data=data, follow=True)
+    assert response.status_code == 200
+    assert AlertAddress.objects.filter(
+        type=sms,
+        address=valid_phone_number,
+    ).exists()
+    assert f"Saved address {valid_phone_number}" in smart_str(response.content)
+
+
+def test_alertprofiles_add_valid_phone_number_with_double_zero_country_code_should_succeed(
+    client,
+):
+    """
+    Tests that a valid phone number with a country code with double zero (00xx) can be
+    added"""
+    valid_phone_number = "004747474747"
+    sms = AlertSender.objects.get(name=AlertSender.SMS)
+    url = reverse("alertprofiles-address-save")
+    data = {
+        "address": valid_phone_number,
+        "type": sms.pk,
+    }
+    response = client.post(url, data=data, follow=True)
+    assert response.status_code == 200
+    assert AlertAddress.objects.filter(
+        type=sms,
+        address=valid_phone_number,
+    ).exists()
+    assert f"Saved address {valid_phone_number}" in smart_str(response.content)
+
+
 def test_alertprofiles_add_invalid_phone_number_should_fail(client):
     """Tests that an invalid phone number cannot be added"""
     invalid_phone_number = "abc"