diff --git a/backend/getInfo.php b/backend/getInfo.php
index 2db3f85..e36f6fb 100644
--- a/backend/getInfo.php
+++ b/backend/getInfo.php
@@ -1,8 +1,11 @@
 <?php
 
 include("getCountry.php");
+include("qqwry.php");
 
 function getIPInfo($ip) {
+    $qqwry = new IpLocation();
+    $detail = $qqwry->getDetail($ip);
     $specialIpInfo = getSpecialIpInfo($ip);
     if (is_string($specialIpInfo)) {
         $info['ip'] = $ip;
@@ -13,6 +16,8 @@ function getIPInfo($ip) {
         $info['timezone'] = null;
         $info['loc'] = null;
         $info['isp'] = $specialIpInfo;
+        $info['cidr'] = $detail['cidr'];
+        $info['detail'] = $detail['addr'];
     } else {
         $rawIspInfo = getIspInfo($ip);
         $info['ip'] = $ip;
@@ -20,21 +25,25 @@ function getIPInfo($ip) {
         $info['city'] = $rawIspInfo['city'];
         $info['region'] = $rawIspInfo['region'];
         $info['country'] = get_country($rawIspInfo['country'])['en'];
+        $info['country'] .= "（".get_country($rawIspInfo['country'])['cn']."）";
         $info['timezone'] = $rawIspInfo['timezone'];
         $info['loc'] = $rawIspInfo['loc'];
         $info['isp'] = getIsp($rawIspInfo);
-        $info['country'] .= "（".get_country($rawIspInfo['country'])['cn']."）";
+        $info['cidr'] = $detail['cidr'];
+        $info['detail'] = $detail['addr'];
     }
 
     if ($_GET['cli'] == "true") {
         $cli = "IP: ".$info['ip'].PHP_EOL;
-        $cli = $cli."AS: ".$info['as'].PHP_EOL;
-        $cli = $cli."City: ".$info['city'].PHP_EOL;
-        $cli = $cli."Region: ".$info['region'].PHP_EOL;
-        $cli = $cli."Country: ".$info['country'].PHP_EOL;
-        $cli = $cli."Timezone: ".$info['timezone'].PHP_EOL;
-        $cli = $cli."Location: ".$info['loc'].PHP_EOL;
-        $cli = $cli."ISP: ".$info['isp'].PHP_EOL;
+        $cli .= "AS: ".$info['as'].PHP_EOL;
+        $cli .= "City: ".$info['city'].PHP_EOL;
+        $cli .= "Region: ".$info['region'].PHP_EOL;
+        $cli .= "Country: ".$info['country'].PHP_EOL;
+        $cli .= "Timezone: ".$info['timezone'].PHP_EOL;
+        $cli .= "Location: ".$info['loc'].PHP_EOL;
+        $cli .= "ISP: ".$info['isp'].PHP_EOL;
+        $cli .= "CIDR: ".$info['cidr'].PHP_EOL;
+        $cli .= "Detail: ".$info['detail'].PHP_EOL;
         return $cli;
     }
 
diff --git a/backend/qqwry.dat b/backend/qqwry.dat
new file mode 100644
index 0000000..de2efb9
Binary files /dev/null and b/backend/qqwry.dat differ
diff --git a/backend/qqwry.php b/backend/qqwry.php
new file mode 100644
index 0000000..2cae774
--- /dev/null
+++ b/backend/qqwry.php
@@ -0,0 +1,150 @@
+<?php
+
+class IpLocation {
+    private $fp; // 文件指针
+    private $firstip; // 第一条记录的偏移地址
+    private $lastip; // 最后一条记录的偏移地址
+    private $totalip; // 总记录条数
+
+    public function __construct() { // 构造函数
+        $this->fp = 0;
+        if (($this->fp = fopen(__DIR__.'/qqwry.dat', 'rb')) !== false) {
+            $this->firstip = $this->getlong();
+            $this->lastip  = $this->getlong();
+            $this->totalip = ($this->lastip - $this->firstip) / 7;
+        }
+    }
+
+    public function __destruct() { // 析构函数
+        if ($this->fp) {
+            fclose($this->fp);
+        }
+        $this->fp = 0;
+    }
+
+    public function getDetail($ip) { // 获取IP地址区段及所在位置
+        if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { // 判断IP是否有效
+            return null;
+        }
+        $location = $this->getLocation($ip);
+        if (!$location) {
+            return null;
+        }
+        $detail['cidr'] = $location['beginip'] . ' - ' . $location['endip'];
+        $detail['addr'] = $location['country'] . $location['area'];
+        return $detail;
+    }
+
+    private function getlong() { // 将读取的4字节转化为长整型数
+        return unpack('Vlong', fread($this->fp, 4))['long'];
+    }
+
+    private function getlong3() { // 将读取的3字节转化为长整型数
+        return unpack('Vlong', fread($this->fp, 3) . chr(0))['long'];
+    }
+
+    private function ip2long($ip) { // 将IP地址转为数字地址
+        $ip_arr = explode('.', $ip);
+        return (16777216 * intval($ip_arr[0])) + (65536 * intval($ip_arr[1])) + (256 * intval($ip_arr[2])) + intval($ip_arr[3]);
+    }
+
+    private function packip($ip) { // 计算压缩后的IP地址
+        return pack('N', intval($this->ip2long($ip)));
+    }
+
+    private function getstring($data = "") { // 读取字符串
+        $char = fread($this->fp, 1);
+        while (ord($char) > 0) { // 字符串读取到\0结束
+            $data .= $char;
+            $char = fread($this->fp, 1);
+        }
+        return $data;
+    }
+
+    private function getArea() { // 获取地区信息
+        $flag = fread($this->fp, 1); // 标志字节
+        if (ord($flag) == 0) { // 无区域信息
+            return '';
+        } else if (ord($flag) == 1 || ord($flag) == 2) { // 区域信息被重定向
+            fseek($this->fp, $this->getlong3());
+            return $this->getstring();
+        } else { // 区域信息未被重定向
+            return $this->getstring($flag);
+        }
+    }
+
+    private function getLocation($ip) { // 根据IP地址返回地区信息
+        $ip = $this->packip($ip);
+        $l = 0; // 搜索下边界
+        $u = $this->totalip; // 搜索上边界
+        $findip = $this->lastip; // 若未找到则返回最后一条记录
+
+        while ($l <= $u) { // 发起查找
+            $i = floor(($l + $u) / 2); // 计算二分点
+            fseek($this->fp, $this->firstip + $i * 7);
+            $beginip = strrev(fread($this->fp, 4)); // 获取二分点所在区域的下边界
+            if ($ip < $beginip) { // 目标IP小于二分区域的下边界
+                $u = $i - 1; // 搜索的上边界缩小到二分点以下
+            } else { // 目标IP大于或等于二分区域的下边界
+                fseek($this->fp, $this->getlong3());
+                $endip = strrev(fread($this->fp, 4)); // 获取二分区域的上边界
+                if ($ip > $endip) { // 目标IP大于二分区域的上边界
+                    $l = $i + 1; // 搜索的下边界缩小到二分点以上
+                } else { // 目标IP在二分区域内
+                    $findip = $this->firstip + $i * 7;
+                    break;
+                }
+            }
+        }
+        fseek($this->fp, $findip);
+        $location['beginip'] = long2ip($this->getlong()); // 目标IP所在区域的下边界
+        $offset = $this->getlong3();
+        fseek($this->fp, $offset);
+        $location['endip'] = long2ip($this->getlong()); // 目标IP所在区域的上边界
+
+        //获取目标IP的位置信息
+        $byte = fread($this->fp, 1); // 标志字节
+        switch (ord($byte)) {
+            case 1: // 国家和区域信息均被重定向
+                $countryOffset = $this->getlong3(); // 重定向地址
+                fseek($this->fp, $countryOffset);
+                $byte = fread($this->fp, 1); // 标志字节
+                switch (ord($byte)) {
+                    case 2: // 国家信息被重定向
+                        fseek($this->fp, $this->getlong3());
+                        $location['country'] = $this->getstring();
+                        fseek($this->fp, $countryOffset + 4);
+                        $location['area'] = $this->getArea();
+                        break;
+                    default: // 国家信息未被重定向
+                        $location['country'] = $this->getstring($byte);
+                        $location['area']    = $this->getArea();
+                        break;
+                }
+                break;
+            case 2: // 国家信息被重定向
+                fseek($this->fp, $this->getlong3());
+                $location['country'] = $this->getstring();
+                fseek($this->fp, $offset + 8);
+                $location['area'] = $this->getArea();
+                break;
+            default: // 国家信息未被重定向
+                $location['country'] = $this->getstring($byte);
+                $location['area'] = $this->getArea();
+                break;
+        }
+
+        // 转为UTF-8编码
+        $location['country'] = iconv("GBK", "UTF-8", $location['country']);
+        $location['area'] = iconv("GBK", "UTF-8", $location['area']);
+
+        // 去除附带信息
+        if ($location['country'] == " CZ88.NET" || $location['country'] == "纯真网络") {
+            $location['country'] = "Unknow";
+        }
+        if ($location['area'] == " CZ88.NET") {
+            $location['area'] = "";
+        }
+        return $location;
+    }
+}
diff --git a/index.html b/index.html
index 201dc03..61560e6 100644
--- a/index.html
+++ b/index.html
@@ -26,6 +26,8 @@
         $("#timezone").text(data.timezone);
         $("#loc").text(data.loc);
         $("#isp").text(data.isp);
+        $("#cidr").text(data.cidr);
+        $("#detail").text(data.detail);
       });
     });
   });
@@ -69,6 +71,14 @@
       <td>ISP</td>
       <td id="isp"></td>
     </tr>
+    <tr>
+      <td>CIDR</td>
+      <td id="cidr"></td>
+    </tr>
+    <tr>
+      <td>Detail</td>
+      <td id="detail"></td>
+    </tr>
   </table>
 </body>
 </html>