diff --git a/app/dao/inbound_numbers_dao.py b/app/dao/inbound_numbers_dao.py
new file mode 100644
index 000000000..1c184b7f6
--- /dev/null
+++ b/app/dao/inbound_numbers_dao.py
@@ -0,0 +1,30 @@
+from app import db
+from app.dao.dao_utils import transactional
+from app.models import InboundNumber
+
+
+def dao_get_inbound_numbers():
+    return InboundNumber.query.all()
+
+
+def dao_get_available_inbound_numbers():
+    return InboundNumber.query.filter(InboundNumber.active, InboundNumber.service_id.is_(None)).all()
+
+
+def dao_get_inbound_number_for_service(service_id):
+    return InboundNumber.query.filter(InboundNumber.service_id == service_id).first()
+
+
+@transactional
+def dao_set_inbound_number_to_service(service_id, inbound_number):
+    inbound_number.service_id = service_id
+
+    db.session.add(inbound_number)
+
+
+@transactional
+def dao_set_inbound_number_active_flag(inbound_number_id, active):
+    inbound_number = InboundNumber.query.filter(InboundNumber.id == inbound_number_id).first()
+    inbound_number.active = active
+
+    db.session.add(inbound_number)
diff --git a/app/models.py b/app/models.py
index 4ab486276..0f4fddf57 100644
--- a/app/models.py
+++ b/app/models.py
@@ -242,6 +242,36 @@ class Service(db.Model, Versioned):
         return cls(**fields)
 
 
+class InboundNumber(db.Model):
+    __tablename__ = "inbound_numbers"
+
+    id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    number = db.Column(db.String(11), unique=True, nullable=False)
+    provider = db.Column(db.String(), nullable=False)
+    service_id = db.Column(UUID(as_uuid=True), db.ForeignKey('services.id'), unique=True, index=True, nullable=True)
+    service = db.relationship(Service, backref=db.backref("inbound_number", uselist=False))
+    active = db.Column(db.Boolean, index=False, unique=False, nullable=False, default=True)
+    created_at = db.Column(db.DateTime, default=datetime.datetime.utcnow, nullable=False)
+    updated_at = db.Column(db.DateTime, nullable=True, onupdate=datetime.datetime.utcnow)
+
+    def serialize(self):
+        def serialize_service():
+            return {
+                "id": str(self.service_id),
+                "name": self.service.name
+            }
+
+        return {
+            "id": str(self.id),
+            "number": self.number,
+            "provider": self.provider,
+            "service": serialize_service() if self.service else None,
+            "active": self.active,
+            "created_at": self.created_at.strftime(DATETIME_FORMAT),
+            "updated_at": self.updated_at.strftime(DATETIME_FORMAT) if self.updated_at else None,
+        }
+
+
 class ServicePermission(db.Model):
     __tablename__ = "service_permissions"
 
diff --git a/migrations/versions/0115_add_inbound_numbers.py b/migrations/versions/0115_add_inbound_numbers.py
new file mode 100644
index 000000000..18644d312
--- /dev/null
+++ b/migrations/versions/0115_add_inbound_numbers.py
@@ -0,0 +1,35 @@
+"""empty message
+
+Revision ID: 0115_add_inbound_numbers
+Revises: 0014_drop_monthly_billing_cols
+Create Date: 2017-08-10 17:30:01.507694
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0115_add_inbound_numbers'
+down_revision = '0014_drop_monthly_billing_cols'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+    op.create_table('inbound_numbers',
+    sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('number', sa.String(length=11), nullable=False),
+    sa.Column('provider', sa.String(), nullable=False),
+    sa.Column('service_id', postgresql.UUID(as_uuid=True), nullable=True),
+    sa.Column('active', sa.Boolean(), nullable=False),
+    sa.Column('created_at', sa.DateTime(), nullable=False),
+    sa.Column('updated_at', sa.DateTime(), nullable=True),
+    sa.ForeignKeyConstraint(['service_id'], ['services.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('number')
+    )
+    op.create_index(op.f('ix_inbound_numbers_service_id'), 'inbound_numbers', ['service_id'], unique=True)
+
+
+def downgrade():
+    op.drop_index(op.f('ix_inbound_numbers_service_id'), table_name='inbound_numbers')
+    op.drop_table('inbound_numbers')
diff --git a/tests/app/conftest.py b/tests/app/conftest.py
index 30a9d4210..d111d8d3c 100644
--- a/tests/app/conftest.py
+++ b/tests/app/conftest.py
@@ -39,7 +39,14 @@ from app.dao.invited_user_dao import save_invited_user
 from app.dao.provider_rates_dao import create_provider_rates
 from app.clients.sms.firetext import FiretextClient
 from tests import create_authorization_header
-from tests.app.db import create_user, create_template, create_notification, create_api_key
+from tests.app.db import (
+    create_user,
+    create_template,
+    create_notification,
+    create_service,
+    create_api_key,
+    create_inbound_number
+)
 
 
 @pytest.yield_fixture
@@ -983,6 +990,16 @@ def sample_provider_rate(notify_db, notify_db_session, valid_from=None, rate=Non
     )
 
 
+@pytest.fixture
+def sample_inbound_numbers(notify_db, notify_db_session, sample_service):
+    service = create_service(service_name='sample service 2')
+    inbound_numbers = []
+    inbound_numbers.append(create_inbound_number(number='1', provider='mmg'))
+    inbound_numbers.append(create_inbound_number(number='2', provider='mmg', active=False, service_id=service.id))
+    inbound_numbers.append(create_inbound_number(number='3', provider='firetext', service_id=sample_service.id))
+    return inbound_numbers
+
+
 @pytest.fixture
 def restore_provider_details(notify_db, notify_db_session):
     """
diff --git a/tests/app/dao/test_inbound_numbers_dao.py b/tests/app/dao/test_inbound_numbers_dao.py
new file mode 100644
index 000000000..9d59a8110
--- /dev/null
+++ b/tests/app/dao/test_inbound_numbers_dao.py
@@ -0,0 +1,81 @@
+import pytest
+from sqlalchemy.exc import IntegrityError
+
+from app.dao.inbound_numbers_dao import (
+    dao_get_inbound_numbers,
+    dao_get_inbound_number_for_service,
+    dao_get_available_inbound_numbers,
+    dao_set_inbound_number_to_service,
+    dao_set_inbound_number_active_flag
+)
+from app.models import InboundNumber
+
+from tests.app.db import create_service, create_inbound_number
+
+
+def test_get_inbound_numbers(notify_db, notify_db_session, sample_inbound_numbers):
+    res = dao_get_inbound_numbers()
+
+    assert len(res) == len(sample_inbound_numbers)
+    assert res == sample_inbound_numbers
+
+
+def test_get_available_inbound_numbers(notify_db, notify_db_session):
+    inbound_number = create_inbound_number(number='1')
+
+    res = dao_get_available_inbound_numbers()
+
+    assert len(res) == 1
+    assert res[0] == inbound_number
+
+
+def test_set_service_id_on_inbound_number(notify_db, notify_db_session, sample_inbound_numbers):
+    service = create_service(service_name='test service')
+    numbers = dao_get_available_inbound_numbers()
+
+    dao_set_inbound_number_to_service(service.id, numbers[0])
+
+    res = InboundNumber.query.filter(InboundNumber.service_id == service.id).all()
+
+    assert len(res) == 1
+    assert res[0].service_id == service.id
+
+
+def test_after_setting_service_id_that_inbound_number_is_unavailable(
+        notify_db, notify_db_session, sample_inbound_numbers):
+    service = create_service(service_name='test service')
+    numbers = dao_get_available_inbound_numbers()
+
+    assert len(numbers) == 1
+
+    dao_set_inbound_number_to_service(service.id, numbers[0])
+
+    res = dao_get_available_inbound_numbers()
+
+    assert len(res) == 0
+
+
+def test_setting_a_service_twice_will_raise_an_error(notify_db, notify_db_session):
+    create_inbound_number(number='1')
+    create_inbound_number(number='2')
+    service = create_service(service_name='test service')
+    numbers = dao_get_available_inbound_numbers()
+
+    dao_set_inbound_number_to_service(service.id, numbers[0])
+
+    with pytest.raises(IntegrityError) as e:
+        dao_set_inbound_number_to_service(service.id, numbers[1])
+
+    assert 'duplicate key value violates unique constraint' in str(e.value)
+
+
+@pytest.mark.parametrize("active", [True, False])
+def test_set_inbound_number_active_flag(notify_db, notify_db_session, sample_service, active):
+    inbound_number = create_inbound_number(number='1')
+    dao_set_inbound_number_to_service(sample_service.id, inbound_number)
+
+    dao_set_inbound_number_active_flag(inbound_number.id, active=active)
+
+    inbound_number = dao_get_inbound_number_for_service(sample_service.id)
+
+    assert inbound_number.active is active
diff --git a/tests/app/dao/test_services_dao.py b/tests/app/dao/test_services_dao.py
index ee4f4f912..b60767289 100644
--- a/tests/app/dao/test_services_dao.py
+++ b/tests/app/dao/test_services_dao.py
@@ -7,6 +7,10 @@ from sqlalchemy.orm.exc import FlushError, NoResultFound
 from sqlalchemy.exc import IntegrityError
 from freezegun import freeze_time
 from app import db
+from app.dao.inbound_numbers_dao import (
+    dao_set_inbound_number_to_service,
+    dao_get_available_inbound_numbers
+)
 from app.dao.services_dao import (
     dao_create_service,
     dao_add_user_to_service,
@@ -896,3 +900,13 @@ def test_dao_fetch_services_by_sms_sender(notify_db_session):
     services = dao_fetch_services_by_sms_sender('foo')
 
     assert {foo1.id, foo2.id} == {x.id for x in services}
+
+
+def test_dao_allocating_inbound_number_shows_on_service(notify_db_session, sample_inbound_numbers):
+    inbound_numbers = dao_get_available_inbound_numbers()
+
+    service = create_service(service_name='test service')
+
+    dao_set_inbound_number_to_service(service.id, inbound_numbers[0])
+
+    assert service.inbound_number.number == inbound_numbers[0].number
diff --git a/tests/app/db.py b/tests/app/db.py
index 71bf29bcb..6a4f45cbf 100644
--- a/tests/app/db.py
+++ b/tests/app/db.py
@@ -15,6 +15,7 @@ from app.models import (
     Rate,
     Job,
     InboundSms,
+    InboundNumber,
     Organisation,
     EMAIL_TYPE,
     SMS_TYPE,
@@ -276,3 +277,16 @@ def create_api_key(service, key_type=KEY_TYPE_NORMAL):
     db.session.add(api_key)
     db.session.commit()
     return api_key
+
+
+def create_inbound_number(number, provider='mmg', active=True, service_id=None):
+    inbound_number = InboundNumber(
+        id=uuid.uuid4(),
+        number=number,
+        provider=provider,
+        active=active,
+        service_id=service_id
+    )
+    db.session.add(inbound_number)
+    db.session.commit()
+    return inbound_number
diff --git a/tests/app/inbound_number/__init__.py b/tests/app/inbound_number/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/app/test_model.py b/tests/app/test_model.py
index 66b96ba4e..b8ffcf9b4 100644
--- a/tests/app/test_model.py
+++ b/tests/app/test_model.py
@@ -19,7 +19,7 @@ from tests.app.conftest import (
     sample_template as create_sample_template,
     sample_notification_with_job as create_sample_notification_with_job
 )
-from tests.app.db import create_notification
+from tests.app.db import create_notification, create_service, create_inbound_number
 
 
 @pytest.mark.parametrize('mobile_number', [
@@ -218,3 +218,12 @@ def test_email_notification_serializes_with_subject(client, sample_email_templat
 def test_letter_notification_serializes_with_subject(client, sample_letter_template):
     res = sample_letter_template.serialize()
     assert res['subject'] == 'Template subject'
+
+
+def test_inbound_number_serializes_with_service(client, notify_db_session):
+    service = create_service()
+    inbound_number = create_inbound_number(number='1', service_id=service.id)
+    serialized_inbound_number = inbound_number.serialize()
+    assert serialized_inbound_number.get('id') == str(inbound_number.id)
+    assert serialized_inbound_number.get('service').get('id') == str(inbound_number.service.id)
+    assert serialized_inbound_number.get('service').get('name') == inbound_number.service.name