diff --git a/app/config.py b/app/config.py
index 1ffdddefd..f3de3baaf 100644
--- a/app/config.py
+++ b/app/config.py
@@ -179,6 +179,7 @@ class Config(object):
     MOU_SIGNED_ON_BEHALF_SIGNER_RECEIPT_TEMPLATE_ID = 'c20206d5-bf03-4002-9a90-37d5032d9e84'
     MOU_SIGNED_ON_BEHALF_ON_BEHALF_RECEIPT_TEMPLATE_ID = '522b6657-5ca5-4368-a294-6b527703bd0b'
     MOU_NOTIFY_TEAM_ALERT_TEMPLATE_ID = 'd0e66c4c-0c50-43f0-94f5-f85b613202d4'
+    NOTIFY_INTERNATIONAL_SMS_SENDER = '07984404008'
 
     BROKER_URL = 'sqs://'
     BROKER_TRANSPORT_OPTIONS = {
diff --git a/app/user/rest.py b/app/user/rest.py
index 68cf78f1a..32aa7b532 100644
--- a/app/user/rest.py
+++ b/app/user/rest.py
@@ -4,6 +4,7 @@ from datetime import datetime
 from urllib.parse import urlencode
 
 from flask import (jsonify, request, Blueprint, current_app, abort)
+from notifications_utils.recipients import is_uk_phone_number
 from sqlalchemy.exc import IntegrityError
 
 from app.config import QueueNames
@@ -104,7 +105,10 @@ def update_user_attribute(user_id):
         elif 'mobile_number' in update_dct:
             template = dao_get_template_by_id(current_app.config['TEAM_MEMBER_EDIT_MOBILE_TEMPLATE_ID'])
             recipient = user_to_update.mobile_number
-            reply_to = template.service.get_default_sms_sender()
+            if is_uk_phone_number(recipient):
+                reply_to = template.service.get_default_sms_sender()
+            else:
+                reply_to = current_app.config['NOTIFY_INTERNATIONAL_SMS_SENDER']
         else:
             return jsonify(data=user_to_update.serialize()), 200
         service = Service.query.get(current_app.config['NOTIFY_SERVICE_ID'])
@@ -267,7 +271,10 @@ def create_2fa_code(template_id, user_to_send_to, secret_code, recipient, person
     create_user_code(user_to_send_to, secret_code, template.template_type)
     reply_to = None
     if template.template_type == SMS_TYPE:
-        reply_to = template.service.get_default_sms_sender()
+        if is_uk_phone_number(recipient):
+            reply_to = template.service.get_default_sms_sender()
+        else:
+            reply_to = current_app.config['NOTIFY_INTERNATIONAL_SMS_SENDER']
     elif template.template_type == EMAIL_TYPE:
         reply_to = template.service.get_default_reply_to_email_address()
     saved_notification = persist_notification(
diff --git a/migrations/versions/0346_notify_number_sms_sender.py b/migrations/versions/0346_notify_number_sms_sender.py
new file mode 100644
index 000000000..fca7ddbcd
--- /dev/null
+++ b/migrations/versions/0346_notify_number_sms_sender.py
@@ -0,0 +1,39 @@
+"""
+
+Revision ID: 0346_notify_number_sms_sender
+Revises: 0345_move_broadcast_provider
+Create Date: 2021-02-17 10:40:10.181087
+
+"""
+import uuid
+
+from alembic import op
+from flask import current_app
+
+revision = '0346_notify_number_sms_sender'
+down_revision = '0345_move_broadcast_provider'
+
+SMS_SENDER_ID = 'd24b830b-57b4-4f14-bd80-02f46f8d54de'
+NOTIFY_SERVICE_ID = current_app.config['NOTIFY_SERVICE_ID']
+INBOUND_NUMBER = current_app.config['NOTIFY_INTERNATIONAL_SMS_SENDER']
+
+
+def upgrade():
+
+    sql = f"""INSERT INTO service_sms_senders (id, sms_sender, service_id, is_default, created_at) 
+            VALUES ('{SMS_SENDER_ID}', '{INBOUND_NUMBER}', '{NOTIFY_SERVICE_ID}',false, now())"""
+
+    op.execute(sql)
+    inbound_number_id = uuid.uuid4()
+    # by adding a row in inbound_number we ensure the number isn't added to the table and assigned to a service.
+    inbound_number_sql = f"""INSERT INTO INBOUND_NUMBERS (id, number, provider, active, created_at)
+            VALUES('{inbound_number_id}', '{INBOUND_NUMBER}', 'mmg', false, now())
+    """
+    op.execute(inbound_number_sql)
+
+
+def downgrade():
+    delete_sms_sender = f"delete from service_sms_senders where id = '{SMS_SENDER_ID}'"
+    delete_inbound_number = f"delete from inbound_numbers where number = '{INBOUND_NUMBER}'"
+    op.execute(delete_sms_sender)
+    op.execute(delete_inbound_number)
diff --git a/tests/app/user/test_rest.py b/tests/app/user/test_rest.py
index 4c447d8c7..64ad80d15 100644
--- a/tests/app/user/test_rest.py
+++ b/tests/app/user/test_rest.py
@@ -4,7 +4,7 @@ import mock
 from uuid import UUID
 from datetime import datetime
 
-from flask import url_for
+from flask import url_for, current_app
 from freezegun import freeze_time
 
 from app.models import (
@@ -310,6 +310,28 @@ def test_post_user_attribute_with_updated_by(
         mock_persist_notification.assert_not_called()
 
 
+def test_post_user_attribute_with_updated_by_sends_notification_to_international_from_number(
+    client, mocker, sample_user, team_member_mobile_edit_template
+):
+    updater = create_user(name="Service Manago")
+    update_dict = {
+        'mobile_number': '601117224412',
+        'updated_by': str(updater.id)
+    }
+    auth_header = create_authorization_header()
+    headers = [('Content-Type', 'application/json'), auth_header]
+    mocker.patch('app.user.rest.send_notification_to_queue')
+    resp = client.post(
+        url_for('user.update_user_attribute', user_id=sample_user.id),
+        data=json.dumps(update_dict),
+        headers=headers)
+
+    assert resp.status_code == 200, resp.get_data(as_text=True)
+
+    notification = Notification.query.first()
+    assert notification.reply_to_text == current_app.config['NOTIFY_INTERNATIONAL_SMS_SENDER']
+
+
 def test_archive_user(mocker, client, sample_user):
     archive_mock = mocker.patch('app.user.rest.dao_archive_user')
 
diff --git a/tests/app/user/test_rest_verify.py b/tests/app/user/test_rest_verify.py
index cfdcc9c11..16661a57f 100644
--- a/tests/app/user/test_rest_verify.py
+++ b/tests/app/user/test_rest_verify.py
@@ -477,3 +477,21 @@ def test_user_verify_email_code_fails_if_code_already_used(admin_request, sample
     assert verify_code.code_used
     assert sample_user.logged_in_at is None
     assert sample_user.current_session_id is None
+
+
+def test_send_user_2fa_code_sends_from_number_for_international_numbers(
+        client, sample_user, mocker, sms_code_template
+):
+    sample_user.mobile_number = "601117224412"
+    auth_header = create_authorization_header()
+    mocker.patch('app.user.rest.create_secret_code', return_value='11111')
+    mocker.patch('app.user.rest.send_notification_to_queue')
+
+    resp = client.post(
+        url_for('user.send_user_2fa_code', code_type='sms', user_id=sample_user.id),
+        data=json.dumps({}),
+        headers=[('Content-Type', 'application/json'), auth_header])
+    assert resp.status_code == 204
+
+    notification = Notification.query.first()
+    assert notification.reply_to_text == current_app.config['NOTIFY_INTERNATIONAL_SMS_SENDER']