diff --git a/boards/models/post/__init__.py b/boards/models/post/__init__.py
--- a/boards/models/post/__init__.py
+++ b/boards/models/post/__init__.py
@@ -1,6 +1,7 @@
 import uuid
+import hashlib
+import re
 
-import re
 from boards import settings
 from boards.abstracts.tripcode import Tripcode
 from boards.models import Attachment, KeyPair, GlobalId
@@ -400,3 +401,6 @@ class Post(models.Model, Viewable):
 
     def get_tags(self):
         return self.get_thread().get_tags()
+
+    def get_ip_color(self):
+        return hashlib.md5(self.poster_ip.encode()).hexdigest()[:6]
diff --git a/boards/templates/boards/post.html b/boards/templates/boards/post.html
--- a/boards/templates/boards/post.html
+++ b/boards/templates/boards/post.html
@@ -7,7 +7,11 @@
     <div class="post-info">
         <a class="post_id" href="{{ post.get_absolute_url }}">#{{ post.id }}</a>
         <span class="title">{{ post.title }}</span>
-        <span class="pub_time"><time datetime="{{ post.pub_time|date:'c' }}">{{ post.pub_time }}</time></span>
+        <span class="pub_time" 
+        {% if perms.boards.change_post %}
+            style="border-bottom: solid 2px #{{ post.get_ip_color }};" title="{{ post.poster_ip }}"
+        {% endif %}
+        ><time datetime="{{ post.pub_time|date:'c' }}">{{ post.pub_time }}</time></span>
         {% if post.tripcode %}
             /
             {% with tripcode=post.get_tripcode %}