diff --git a/payload/user/remote_access/pager-webui/server.py b/payload/user/remote_access/pager-webui/server.py
index 4fcd064..5f9994a 100644
--- a/payload/user/remote_access/pager-webui/server.py
+++ b/payload/user/remote_access/pager-webui/server.py
@@ -1594,6 +1594,55 @@ def _uci_wifi_iface(name):
     return _uci_values('wireless.%s' % name)
 
 
+BAND_2G = '2.4'
+BAND_5G = '5'
+BAND_6G = '6'
+
+CHANNEL_BANDS = {
+    BAND_2G: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
+    BAND_5G: [36, 40, 44, 48, 52, 56, 60, 64,
+              100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144,
+              149, 153, 157, 161, 165],
+    BAND_6G: list(range(1, 234, 4)),
+}
+DFS_CHANNELS = frozenset([52, 56, 60, 64, 100, 104, 108, 112, 116, 120,
+                          124, 128, 132, 136, 140, 144])
+
+
+def channel_band(ch):
+    if ch is None:
+        return None
+    try:
+        ch = int(ch)
+    except (TypeError, ValueError):
+        return None
+    if 1 <= ch <= 14:
+        return BAND_2G
+    if 36 <= ch <= 177:
+        return BAND_5G
+    if 1 <= ch <= 233 and (ch - 1) % 4 == 0:
+        return BAND_6G
+    return None
+
+
+def channel_freq(band, ch):
+    if band == BAND_2G:
+        return 2412 + (ch - 1) * 5
+    if band == BAND_5G:
+        return 5180 + (ch - 36) * 5
+    if band == BAND_6G:
+        return 5955 + (ch - 1) * 5
+    return None
+
+
+def band_htmode(band):
+    return {BAND_2G: 'HT20', BAND_5G: 'VHT80', BAND_6G: 'HE80'}.get(band)
+
+
+def band_radio(band):
+    return 'radio0' if band == BAND_2G else 'radio1'
+
+
 def _uci_section(section):
     return _uci_values(section)
 
diff --git a/tests/test_pineap_bands.py b/tests/test_pineap_bands.py
new file mode 100644
index 0000000..773b5b5
--- /dev/null
+++ b/tests/test_pineap_bands.py
@@ -0,0 +1,59 @@
+import os
+import sys
+import unittest
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'payload', 'user', 'remote_access', 'pager-webui'))
+import server
+
+
+def setUpModule():
+    __import__('importlib').reload(server)
+
+
+class ChannelBandTest(unittest.TestCase):
+    def test_2g_channels(self):
+        for ch in (1, 6, 11, 14):
+            self.assertEqual(server.channel_band(ch), server.BAND_2G)
+
+    def test_5g_channels(self):
+        for ch in (36, 48, 100, 149, 165, 177):
+            self.assertEqual(server.channel_band(ch), server.BAND_5G)
+
+    def test_6g_channels(self):
+        for ch in (181, 189, 197, 205, 213, 225, 233):
+            self.assertEqual(server.channel_band(ch), server.BAND_6G)
+
+    def test_invalid(self):
+        for ch in (0, 15, 35, 178, 234, None, 'x'):
+            self.assertIsNone(server.channel_band(ch))
+
+
+class ChannelFreqTest(unittest.TestCase):
+    def test_freqs(self):
+        self.assertEqual(server.channel_freq(server.BAND_2G, 1), 2412)
+        self.assertEqual(server.channel_freq(server.BAND_2G, 11), 2462)
+        self.assertEqual(server.channel_freq(server.BAND_5G, 36), 5180)
+        self.assertEqual(server.channel_freq(server.BAND_5G, 165), 5825)
+        self.assertEqual(server.channel_freq(server.BAND_6G, 1), 5955)
+        self.assertEqual(server.channel_freq(server.BAND_6G, 233), 7115)
+
+
+class BandAuxTest(unittest.TestCase):
+    def test_htmode(self):
+        self.assertEqual(server.band_htmode(server.BAND_2G), 'HT20')
+        self.assertEqual(server.band_htmode(server.BAND_5G), 'VHT80')
+        self.assertEqual(server.band_htmode(server.BAND_6G), 'HE80')
+
+    def test_radio(self):
+        self.assertEqual(server.band_radio(server.BAND_2G), 'radio0')
+        self.assertEqual(server.band_radio(server.BAND_5G), 'radio1')
+        self.assertEqual(server.band_radio(server.BAND_6G), 'radio1')
+
+    def test_dfs_marker(self):
+        self.assertIn(52, server.DFS_CHANNELS)
+        self.assertIn(144, server.DFS_CHANNELS)
+        self.assertNotIn(149, server.DFS_CHANNELS)
+
+
+if __name__ == '__main__':
+    unittest.main()