diff --git a/ogn_python/backend/ognrange.py b/ogn_python/backend/ognrange.py
index 468e470..31038b7 100644
--- a/ogn_python/backend/ognrange.py
+++ b/ogn_python/backend/ognrange.py
@@ -3,7 +3,7 @@ from datetime import datetime, timedelta
 
 from sqlalchemy import func, case
 from sqlalchemy.sql.expression import label
-from ogn_python.model import Receiver
+from ogn_python.model import Receiver, ReceiverCoverage
 
 from ogn_python import db
 
@@ -19,20 +19,36 @@ def alchemyencoder(obj):
         return float(obj)
 
 
-def stations2_filtered_pl():
+def stations2_filtered_pl(start, end):
     last_10_minutes = datetime.utcnow() - timedelta(minutes=10)
 
     query = db.session.query(
-        Receiver.name.label('s'),
-        label('lt', func.round(func.ST_Y(Receiver.location_wkt) * 10000) / 10000),
-        label('lg', func.round(func.ST_X(Receiver.location_wkt) * 10000) / 10000),
-        case([(Receiver.lastseen > last_10_minutes, "U")],
-            else_="D").label('u'),
-        Receiver.lastseen.label('ut'),
-        label('v', Receiver.version + '.' + Receiver.platform)) \
-        .order_by(Receiver.lastseen)
+            Receiver.name.label('s'),
+            label('lt', func.round(func.ST_Y(Receiver.location_wkt) * 10000) / 10000),
+            label('lg', func.round(func.ST_X(Receiver.location_wkt) * 10000) / 10000),
+            case([(Receiver.lastseen > last_10_minutes, "U")],
+                else_="D").label('u'),
+            Receiver.lastseen.label('ut'),
+            label('v', Receiver.version + '.' + Receiver.platform)) \
+        .order_by(Receiver.lastseen) \
+        .filter(db.or_(db.and_(start < Receiver.firstseen, end > Receiver.firstseen),
+                       db.and_(start < Receiver.lastseen, end > Receiver.lastseen)))
 
     res = db.session.execute(query)
     stations = json.dumps({'stations': [dict(r) for r in res]}, default=alchemyencoder)
 
     return stations
+
+
+def max_tile_mgrs_pl(station, start, end, squares):
+    query = db.session.query(
+            func.right(ReceiverCoverage.location_mgrs_short, 4),
+            func.count(ReceiverCoverage.location_mgrs_short)
+            ) \
+        .filter(db.and_(Receiver.id == ReceiverCoverage.receiver_id, Receiver.name == station)) \
+        .filter(ReceiverCoverage.location_mgrs_short.like(squares + '%')) \
+        .group_by(func.right(ReceiverCoverage.location_mgrs_short, 4))
+
+    res = {'t': squares,
+           'p': ['{}/{}'.format(r[0], r[1]) for r in query.all()]}
+    return json.dumps(res)
\ No newline at end of file
diff --git a/tests/backend/test_backends.py b/tests/backend/test_backends.py
index 26284a1..8cc985c 100644
--- a/tests/backend/test_backends.py
+++ b/tests/backend/test_backends.py
@@ -1,5 +1,5 @@
 import json
-from datetime import datetime
+from datetime import datetime, date
 
 import unittest
 from unittest import mock
@@ -8,10 +8,10 @@ from xmlunittest import XmlTestMixin
 
 from tests.base import TestBaseDB, db
 
-from ogn_python.model import AircraftBeacon, AircraftType, Receiver, Device, DeviceInfo
+from ogn_python.model import AircraftBeacon, AircraftType, Receiver, Device, DeviceInfo, ReceiverCoverage
 
 from ogn_python.backend.liveglidernet import rec, lxml
-from ogn_python.backend.ognrange import stations2_filtered_pl
+from ogn_python.backend.ognrange import stations2_filtered_pl, max_tile_mgrs_pl
 
 
 class TestDB(TestBaseDB, XmlTestMixin):
@@ -47,6 +47,15 @@ class TestDB(TestBaseDB, XmlTestMixin):
         db.session.add(self.ab22)
         db.session.commit()
 
+        self.rc11 = ReceiverCoverage(location_mgrs_short='32TPU8312', date=date(2017, 12, 20), max_signal_quality=10, max_altitude=1000, min_altitude=600, aircraft_beacon_count=20, device_count=2, receiver=self.r01)
+        self.rc12 = ReceiverCoverage(location_mgrs_short='32TPU8434', date=date(2017, 12, 20), max_signal_quality=10, max_altitude=1000, min_altitude=600, aircraft_beacon_count=20, device_count=2, receiver=self.r01)
+        self.rc12 = ReceiverCoverage(location_mgrs_short='32TPU8434', date=date(2017, 12, 21), max_signal_quality=10, max_altitude=1000, min_altitude=600, aircraft_beacon_count=20, device_count=2, receiver=self.r01)
+        self.rc21 = ReceiverCoverage(location_mgrs_short='32TPU8512', date=date(2017, 12, 20), max_signal_quality=10, max_altitude=1000, min_altitude=600, aircraft_beacon_count=20, device_count=2, receiver=self.r02)
+        db.session.add(self.rc11)
+        db.session.add(self.rc12)
+        db.session.add(self.rc21)
+        db.session.commit()
+
     @mock.patch('ogn_python.backend.liveglidernet.datetime')
     def test_rec(self, datetime_mock):
         datetime_mock.utcnow.return_value = datetime(2017, 12, 20, 10, 0)
@@ -91,7 +100,7 @@ class TestDB(TestBaseDB, XmlTestMixin):
     def test_stations2_filtered_pl(self, datetime_mock):
         datetime_mock.utcnow.return_value = datetime(2017, 12, 20, 10, 0)
 
-        result = stations2_filtered_pl()
+        result = stations2_filtered_pl(start=date(2017, 12, 15), end=date(2017, 12, 25))
 
         data = json.loads(result)
 
@@ -119,6 +128,22 @@ class TestDB(TestBaseDB, XmlTestMixin):
 
         self.assertEqual(s3["s"], 'Ohlstadt')
 
+    def test_max_tile_mgrs_pl(self):
+        result = max_tile_mgrs_pl(station='Koenigsdf', start=date(2017, 12, 15), end=date(2017, 12, 25), squares='32TPU')
+
+        data = json.loads(result)
+
+        self.assertEqual(data['t'], '32TPU')
+        self.assertEqual(data['p'][0], '8312/1')
+        self.assertEqual(data['p'][1], '8434/2')
+
+        result = max_tile_mgrs_pl(station='Bene', start=date(2017, 12, 15), end=date(2017, 12, 25), squares='32TPU')
+
+        data = json.loads(result)
+
+        self.assertEqual(data['t'], '32TPU')
+        self.assertEqual(data['p'][0], '8512/1')
+
 
 if __name__ == '__main__':
     unittest.main()