diff --git a/database/yggstate.mwb b/database/yggstate.mwb
index a8e2d67..4acbca8 100644
Binary files a/database/yggstate.mwb and b/database/yggstate.mwb differ
diff --git a/media/db-prototype.png b/media/db-prototype.png
index 0fce076..f729fd1 100644
Binary files a/media/db-prototype.png and b/media/db-prototype.png differ
diff --git a/src/crontab/crawler.php b/src/crontab/crawler.php
index f4fb23f..b299107 100644
--- a/src/crontab/crawler.php
+++ b/src/crontab/crawler.php
@@ -44,7 +44,18 @@ $debug = [
           'insert' => 0,
           'update' => 0,
         ]
-      ]
+      ],
+      'coordinate' => [
+        'total' => [
+          'insert' => 0,
+        ],
+        'route' => [
+          'total' => [
+            'insert' => 0,
+            'delete' => 0,
+          ]
+        ]
+      ],
     ]
   ]
 ];
@@ -82,7 +93,7 @@ if ($connectedPeers = Yggverse\Yggdrasilctl\Yggdrasil::getPeers()) {
         $debug['yggdrasil']['peer']['total']['insert']++;
       }
 
-      // Init peer data
+      // Init peer remote
       if ($connectedPeerRemoteUrl = Yggverse\Parser\Url::parse($connectedPeerInfo->remote)) {
 
         if ($dbPeerRemote = $db->findPeerRemote($dbPeerId,
@@ -122,6 +133,38 @@ if ($connectedPeers = Yggverse\Yggdrasilctl\Yggdrasil::getPeers()) {
 
           $debug['yggdrasil']['peer']['remote']['total']['insert']++;
         }
+
+        // Init peer coordinate
+        if ($dbPeerCoordinate = $db->getLastCoordinate($dbPeerId)) {
+
+          $peerCoordinateId = $dbPeerCoordinate->peerCoordinateId;
+
+        } else {
+
+          $peerCoordinateId = $db->addPeerCoordinate($dbPeerId, $connectedPeerInfo->port, time());
+          $debug['yggdrasil']['peer']['coordinate']['total']['insert']++;
+        }
+
+        // Init peer coordinate route
+
+        $localPeerCoordinateRoute = [];
+        foreach ($db->getPeerCoordinateRoute($peerCoordinateId) as $dbPeerCoordinateRoute) {
+
+          $localPeerCoordinateRoute[$dbPeerCoordinateRoute->level] = $dbPeerCoordinateRoute->port;
+        }
+
+        // Compare remote and local routes to prevent write operations
+        if ($localPeerCoordinateRoute !== $connectedPeerInfo->coords) {
+
+          $debug['yggdrasil']['peer']['coordinate']['route']['total']['delete'] +=
+          $db->flushPeerCoordinateRoute($peerCoordinateId);
+
+          foreach ($connectedPeerInfo->coords as $level => $port) {
+
+            $debug['yggdrasil']['peer']['coordinate']['route']['total']['insert'] +=
+            $db->addPeerCoordinateRoute($peerCoordinateId, $level, $port);
+          }
+        }
       }
 
       $debug['yggdrasil']['peer']['total']['online']++;
diff --git a/src/library/mysql.php b/src/library/mysql.php
index 4f9fd7e..9979939 100644
--- a/src/library/mysql.php
+++ b/src/library/mysql.php
@@ -155,6 +155,68 @@ class MySQL {
     return $query->fetch();
   }
 
+  // Peer coordinate
+  // https://github.com/matrix-org/pinecone/wiki/2.-Spanning-Tree#coordinates
+
+  public function addPeerCoordinate(int $peerId, int $port, int $timeAdded) {
+
+    $this->_debug->query->insert->total++;
+
+    $query = $this->_db->prepare('INSERT INTO `peerCoordinate` SET `peerId`    = ?,
+                                                                   `port`      = ?,
+                                                                   `timeAdded` = ?');
+
+    $query->execute([$peerId, $port, $timeAdded]);
+
+    return $this->_db->lastInsertId();
+  }
+
+  public function addPeerCoordinateRoute(int $peerCoordinateId, int $level, int $port) {
+
+    $this->_debug->query->insert->total++;
+
+    $query = $this->_db->prepare('INSERT INTO `peerCoordinateRoute` SET `peerCoordinateId` = ?,
+                                                                        `level`            = ?,
+                                                                        `port`             = ?');
+
+    $query->execute([$peerCoordinateId, $level, $port]);
+
+    return $this->_db->lastInsertId();
+  }
+
+  public function flushPeerCoordinateRoute(int $peerCoordinateId) {
+
+    $this->_debug->query->delete->total++;
+
+    $query = $this->_db->prepare('DELETE FROM `peerCoordinateRoute` WHERE `peerCoordinateId` = ?');
+
+    $query->execute([$peerCoordinateId]);
+
+    return $query->rowCount();
+  }
+
+  public function getLastCoordinate(int $peerId) {
+
+    $this->_debug->query->select->total++;
+
+    $query = $this->_db->prepare('SELECT * FROM `peerCoordinate` WHERE `peerId` = ? ORDER BY `timeAdded` DESC LIMIT 1');
+
+    $query->execute([$peerId]);
+
+    return $query->fetch();
+  }
+
+  public function getPeerCoordinateRoute(int $peerCoordinateId) {
+
+    $this->_debug->query->select->total++;
+
+    $query = $this->_db->prepare('SELECT * FROM `peerCoordinateRoute` WHERE `peerCoordinateId` = ? ORDER BY `level` ASC');
+
+    $query->execute([$peerCoordinateId]);
+
+    return $query->fetchAll();
+  }
+
   // Other
   public function optimize() {