diff --git a/ifconfig.go b/ifconfig.go
index a1ca2e4..f9380bd 100644
--- a/ifconfig.go
+++ b/ifconfig.go
@@ -8,10 +8,13 @@ import (
     "net"
     "net/http"
     "regexp"
+    "strings"
 )
 
 type Client struct {
     IP net.IP
+    Port string
+    Header http.Header
 }
 
 func isCli(userAgent string) bool {
@@ -20,32 +23,55 @@ func isCli(userAgent string) bool {
     return match
 }
 
+func parseRealIP(req *http.Request) (net.IP, string) {
+    var host string
+    var port string
+    realIP := req.Header.Get("X-Real-IP")
+    if realIP != "" {
+        host = realIP
+    } else {
+        host, port, _ = net.SplitHostPort(req.RemoteAddr)
+    }
+    return net.ParseIP(host), port
+}
+
+func pathToKey(path string) string {
+    re := regexp.MustCompile("^\\/|\\.json$")
+    return re.ReplaceAllLiteralString(strings.ToLower(path), "")
+}
+
+func isJson(req *http.Request) bool {
+    return strings.HasSuffix(req.URL.Path, ".json") ||
+        strings.Contains(req.Header.Get("Accept"), "application/json")
+}
+
 func handler(w http.ResponseWriter, req *http.Request) {
     if req.Method != "GET" {
         http.Error(w, "Invalid request method", 405)
         return
     }
 
-    var host string
-    var err error
-    realIP := req.Header.Get("X-Real-IP")
-    if realIP != "" {
-        host = realIP
-    } else {
-        host, _, err = net.SplitHostPort(req.RemoteAddr)
-    }
-    ip := net.ParseIP(host)
-    if err != nil {
-        log.Printf("Failed to parse remote address: %s\n", req.RemoteAddr)
-        http.Error(w, "Failed to parse remote address", 500)
-        return
-    }
+    ip, port := parseRealIP(req)
+    header := pathToKey(req.URL.Path)
 
     if isCli(req.UserAgent()) {
-        io.WriteString(w, fmt.Sprintf("%s\n", ip))
+        if header == "" || header == "ip" {
+            io.WriteString(w, fmt.Sprintf("%s\n", ip))
+        } else if header == "port" {
+            io.WriteString(w, fmt.Sprintf("%s\n", port))
+        } else {
+            value := req.Header.Get(header)
+            io.WriteString(w, fmt.Sprintf("%s\n", value))
+        }
     } else {
-        t, _ := template.ParseFiles("index.html")
-        client := &Client{IP: ip}
+        funcMap := template.FuncMap {
+            "ToLower": strings.ToLower,
+        }
+        t, _ := template.
+            New("index.html").
+            Funcs(funcMap).
+            ParseFiles("index.html")
+        client := &Client{IP: ip, Port: port, Header: req.Header}
         t.Execute(w, client)
     }
 }
diff --git a/index.html b/index.html
index de1ae94..7288863 100644
--- a/index.html
+++ b/index.html
@@ -5,13 +5,16 @@
     <title>What is my IP address &mdash; ifconfig.co</title>
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="description" content="Lookup my IP address">
-    <link href='http://fonts.googleapis.com/css?family=Oswald' rel='stylesheet' type='text/css'>
+    <link href="http://fonts.googleapis.com/css?family=Oswald" rel="stylesheet" type="text/css">
+    <link href="/assets/css/bootstrap.min.css" rel="stylesheet" type="text/css">
     <style>
-      h1, p {
-        font-family: 'Oswald', sans-serif;
+      body {
+        padding-top: 60px;
+        font-family: "Oswald", sans-serif;
       }
-      .ip {
-        font-size: 1.5em;
+      .response {
+        font-family: "Monaco", "Menlo", "Consolas", "Courier New", monospace;
+        font-size: 12px;
       }
       #wrapper {
         margin: 0 auto;
@@ -20,9 +23,44 @@
     </style>
   </head>
   <body>
-    <div id="wrapper">
-      <h1>What is my IP address?</h1>
-      <p>Your IP address is: <br><span class="ip">{{ .IP }}</span></p> 
+    <div class="container">
+      <div class="row">
+        <div id="wrapper">
+          <h1>What is my IP address?</h1>
+          <p>Your IP address is:</p>
+          <h2>{{ .IP }}</h2>
+        </div>
+      </div>
+      <div class="row">
+        <div class="span12">
+          <table class="table table-bordered table-striped">
+            <thead>
+              <tr>
+                <th class="span4">Command</th>
+                <th>Response</th>
+              </tr>
+            </thead>
+            <tbody>
+              <tr>
+                <td><code>curl ifconfig.co</code></td>
+                <td class="response">{{ .IP }}</td>
+              </tr>
+              <tr>
+                <td><code>curl ifconfig.co/port</code></td>
+                <td class="response">{{ .Port }}</td>
+              </tr>
+              {{ if $self := . }}
+              {{ range $key, $value := .Header }}
+              <tr>
+                <td><code>curl ifconfig.co/{{ ToLower $key }}</code></td>
+                <td class="response">{{ index $self.Header $key }}
+              </tr>
+              {{end}}
+              {{end}}
+            </tbody>
+          </table>
+        </div>
+      </div>
     </div>
     <a href="https://github.com/martinp/ifconfig"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
   </body>

Command	Response
`curl ifconfig.co`	{{ .IP }}
`curl ifconfig.co/port`	{{ .Port }}
`curl ifconfig.co/{{ ToLower $key }}`	{{ index $self.Header $key }} +