diff --git a/CHANGELOG.md b/CHANGELOG.md
index 837e00d1c..4035b2d2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
 - **New option**: `Auto-hide header on scroll`.
+- Added support for `4cdn.org`.
 
 ## 3.13.0 - *2013-11-16*
 
diff --git a/package.json b/package.json
index 51a2aaa56..f297c9f51 100644
--- a/package.json
+++ b/package.json
@@ -9,10 +9,10 @@
     "buildsPath": "builds/",
     "mainBranch": "v3",
     "matches": [
-      "*://api.4chan.org/*",
       "*://boards.4chan.org/*",
-      "*://images.4chan.org/*",
-      "*://sys.4chan.org/*"
+      "*://sys.4chan.org/*",
+      "*://a.4cdn.org/*",
+      "*://i.4cdn.org/*"
     ],
     "min": {
       "chrome": "29",
diff --git a/src/Filtering/ThreadHiding.coffee b/src/Filtering/ThreadHiding.coffee
index 920bfe4f2..a5ecb82de 100644
--- a/src/Filtering/ThreadHiding.coffee
+++ b/src/Filtering/ThreadHiding.coffee
@@ -58,7 +58,7 @@ ThreadHiding =
     # We need to clean hidden threads on the catalog ourselves,
     # otherwise if we don't visit the catalog regularly
     # it will pollute the localStorage and our data.
-    $.cache "//api.4chan.org/#{g.BOARD}/threads.json", ->
+    $.cache "//a.4cdn.org/#{g.BOARD}/threads.json", ->
       return unless @status is 200
       threads = {}
       for page in JSON.parse @response
diff --git a/src/General/Build.coffee b/src/General/Build.coffee
index 8c4c96144..1536bb30f 100644
--- a/src/General/Build.coffee
+++ b/src/General/Build.coffee
@@ -36,14 +36,14 @@ Build =
         name:      data.filename + data.ext
         timestamp: "#{data.tim}#{data.ext}"
         url: if boardID is 'f'
-          "//images.4channel.org/#{boardID}/src/#{data.filename}#{data.ext}"
+          "//i.4cdn.org/#{boardID}/src/#{data.filename}#{data.ext}"
         else
-          "//images.4chan.org/#{boardID}/src/#{data.tim}#{data.ext}"
+          "//i.4cdn.org/#{boardID}/src/#{data.tim}#{data.ext}"
         height:    data.h
         width:     data.w
         MD5:       data.md5
         size:      data.fsize
-        turl:      "//thumbs.4chan.org/#{boardID}/thumb/#{data.tim}s.jpg"
+        turl:      "//t.4cdn.org/#{boardID}/thumb/#{data.tim}s.jpg"
         theight:   data.tn_h
         twidth:    data.tn_w
         isSpoiler: !!data.spoiler
@@ -59,7 +59,7 @@ Build =
     } = o
     isOP = postID is threadID
 
-    staticPath = '//static.4chan.org/image/'
+    staticPath = '//s.4cdn.org/image/'
     gifIcon = if window.devicePixelRatio >= 2
       '@2x.gif'
     else
diff --git a/src/General/DataBoard.coffee b/src/General/DataBoard.coffee
index 0e366ff50..c3e9a6ebc 100644
--- a/src/General/DataBoard.coffee
+++ b/src/General/DataBoard.coffee
@@ -69,7 +69,7 @@ class DataBoard
 
     @save()
   ajaxClean: (boardID) ->
-    $.cache "//api.4chan.org/#{boardID}/threads.json", (e) =>
+    $.cache "//a.4cdn.org/#{boardID}/threads.json", (e) =>
       if e.target.status isnt 200
         @delete boardID if e.target.status is 404
         return
diff --git a/src/General/Get.coffee b/src/General/Get.coffee
index d19e8db11..e2afc668a 100644
--- a/src/General/Get.coffee
+++ b/src/General/Get.coffee
@@ -70,7 +70,7 @@ Get =
 
     root.textContent = "Loading post No.#{postID}..."
     if threadID
-      $.cache "//api.4chan.org/#{boardID}/res/#{threadID}.json", ->
+      $.cache "//a.4cdn.org/#{boardID}/res/#{threadID}.json", ->
         Get.fetchedPost @, boardID, threadID, postID, root, context
     else if url = Redirect.to 'post', {boardID, postID}
       $.cache url,
@@ -222,7 +222,7 @@ Get =
         width:     data.media.media_w
         MD5:       data.media.media_hash
         size:      data.media.media_size
-        turl:      data.media.thumb_link or "//thumbs.4chan.org/#{boardID}/thumb/#{data.media.preview_orig}"
+        turl:      data.media.thumb_link or "//t.4cdn.org/#{boardID}/thumb/#{data.media.preview_orig}"
         theight:   data.media.preview_h
         twidth:    data.media.preview_w
         isSpoiler: data.media.spoiler is '1'
diff --git a/src/General/Index.coffee b/src/General/Index.coffee
index 14af9acbc..81c04d9bb 100644
--- a/src/General/Index.coffee
+++ b/src/General/Index.coffee
@@ -188,7 +188,7 @@ Index =
           return unless Index.req and !Index.notice
           Index.notice = new Notice 'info', 'Refreshing index...'
         ), 5 * $.SECOND - (Date.now() - now)
-    Index.req = $.ajax "//api.4chan.org/#{g.BOARD}/catalog.json",
+    Index.req = $.ajax "//a.4cdn.org/#{g.BOARD}/catalog.json",
       onabort:   Index.load
       onloadend: Index.load
     ,
diff --git a/src/General/Main.coffee b/src/General/Main.coffee
index 56dc4d618..07d495cde 100644
--- a/src/General/Main.coffee
+++ b/src/General/Main.coffee
@@ -38,12 +38,12 @@ Main =
 
   initFeatures: ->
     switch location.hostname
-      when 'api.4chan.org'
+      when 'a.4cdn.org'
         return
       when 'sys.4chan.org'
         Report.init()
         return
-      when 'images.4chan.org'
+      when 'i.4cdn.org'
         $.ready ->
           if Conf['404 Redirect'] and d.title is '4chan - 404 Not Found'
             Redirect.init()
diff --git a/src/General/Post.coffee b/src/General/Post.coffee
index 5cb484309..f7bc31918 100644
--- a/src/General/Post.coffee
+++ b/src/General/Post.coffee
@@ -127,7 +127,7 @@ class Post
     @file.thumbURL = if that.isArchived
       thumb.src
     else
-      "#{location.protocol}//thumbs.4chan.org/#{@board}/thumb/#{@file.URL.match(/(\d+)\./)[1]}s.jpg"
+      "#{location.protocol}//t.4cdn.org/#{@board}/thumb/#{@file.URL.match(/(\d+)\./)[1]}s.jpg"
     @file.name = $('span[title]', fileInfo).title
     <% if (type === 'crx') { %>
     # replace %22 with quotes, see:
diff --git a/src/General/Settings.coffee b/src/General/Settings.coffee
index 4c0499e4c..8f7cc2d5c 100644
--- a/src/General/Settings.coffee
+++ b/src/General/Settings.coffee
@@ -353,7 +353,7 @@ Settings =
     data =
       isReply: true
       file:
-        URL: '//images.4chan.org/g/src/1334437723720.jpg'
+        URL: '//i.4cdn.org/g/src/1334437723720.jpg'
         name: 'd9bb2efc98dd0df141a94399ff5880b7.jpg'
         size: '276 KB'
         sizeInBytes: 276 * 1024
diff --git a/src/General/Thread.coffee b/src/General/Thread.coffee
index 60de5ed4d..27987723d 100644
--- a/src/General/Thread.coffee
+++ b/src/General/Thread.coffee
@@ -27,7 +27,7 @@ class Thread
       $.rm $ ".#{typeLC}Icon", @OP.nodes.info
       return
     icon = $.el 'img',
-      src: "//static.4chan.org/image/#{typeLC}#{if window.devicePixelRatio >= 2 then '@2x' else ''}.gif"
+      src: "//s.4cdn.org/image/#{typeLC}#{if window.devicePixelRatio >= 2 then '@2x' else ''}.gif"
       alt:   type
       title: type
       className: "#{typeLC}Icon"
diff --git a/src/Images/ImageExpand.coffee b/src/Images/ImageExpand.coffee
index 8d20eb4bb..47779828b 100644
--- a/src/Images/ImageExpand.coffee
+++ b/src/Images/ImageExpand.coffee
@@ -121,7 +121,7 @@ ImageExpand =
     ImageExpand.contract post
 
     src = @src.split '/'
-    if src[2] is 'images.4chan.org'
+    if src[2] is 'i.4cdn.org'
       URL = Redirect.to 'file',
         boardID:  src[3]
         filename: src[5].replace /\?.+$/, ''
@@ -132,8 +132,8 @@ ImageExpand =
         return
 
     timeoutID = setTimeout ImageExpand.expand, 10000, post
-    # XXX CORS for images.4chan.org WHEN?
-    $.ajax "//api.4chan.org/#{post.board}/res/#{post.thread}.json", onload: ->
+    # XXX CORS for i.4cdn.org WHEN?
+    $.ajax "//a.4cdn.org/#{post.board}/res/#{post.thread}.json", onload: ->
       return if @status isnt 200
       for postObj in JSON.parse(@response).posts
         break if postObj.no is post.ID
diff --git a/src/Images/ImageHover.coffee b/src/Images/ImageHover.coffee
index c2c1eac99..5e1dcd501 100644
--- a/src/Images/ImageHover.coffee
+++ b/src/Images/ImageHover.coffee
@@ -27,7 +27,7 @@ ImageHover =
     post = g.posts[@dataset.fullID]
 
     src = @src.split '/'
-    if src[2] is 'images.4chan.org'
+    if src[2] is 'i.4cdn.org'
       URL = Redirect.to 'file',
         boardID:  src[3]
         filename: src[5].replace /\?.+$/, ''
@@ -38,8 +38,8 @@ ImageHover =
         return
 
     timeoutID = setTimeout (=> @src = post.file.URL + '?' + Date.now()), 3000
-    # XXX CORS for images.4chan.org WHEN?
-    $.ajax "//api.4chan.org/#{post.board}/res/#{post.thread}.json", onload: ->
+    # XXX CORS for i.4cdn.org WHEN?
+    $.ajax "//a.4cdn.org/#{post.board}/res/#{post.thread}.json", onload: ->
       return if @status isnt 200
       for postObj in JSON.parse(@response).posts
         break if postObj.no is post.ID
diff --git a/src/Miscellaneous/ExpandThread.coffee b/src/Miscellaneous/ExpandThread.coffee
index 086f76d8d..3acd11bba 100644
--- a/src/Miscellaneous/ExpandThread.coffee
+++ b/src/Miscellaneous/ExpandThread.coffee
@@ -39,7 +39,7 @@ ExpandThread =
   expand: (thread, a, threadRoot) ->
     ExpandThread.statuses[thread] = status = {}
     a.textContent = ExpandThread.text '...', a.textContent.match(/\d+/g)...
-    status.req = $.cache "//api.4chan.org/#{thread.board}/res/#{thread}.json", ->
+    status.req = $.cache "//a.4cdn.org/#{thread.board}/res/#{thread}.json", ->
       delete status.req
       ExpandThread.parse @, thread, a
   contract: (thread, a, threadRoot) ->
diff --git a/src/Monitoring/ThreadStats.coffee b/src/Monitoring/ThreadStats.coffee
index 89d1be0c8..dc189a572 100644
--- a/src/Monitoring/ThreadStats.coffee
+++ b/src/Monitoring/ThreadStats.coffee
@@ -37,7 +37,7 @@ ThreadStats =
       $.addClass ThreadStats.pageCountEl, 'warning'
       return
     setTimeout ThreadStats.fetchPage, 2 * $.MINUTE
-    $.ajax "//api.4chan.org/#{ThreadStats.thread.board}/threads.json", onload: ThreadStats.onThreadsLoad,
+    $.ajax "//a.4cdn.org/#{ThreadStats.thread.board}/threads.json", onload: ThreadStats.onThreadsLoad,
       whenModified: true
   onThreadsLoad: ->
     return if @status isnt 200
diff --git a/src/Monitoring/ThreadUpdater.coffee b/src/Monitoring/ThreadUpdater.coffee
index 0ef1d04bf..f42dc1283 100644
--- a/src/Monitoring/ThreadUpdater.coffee
+++ b/src/Monitoring/ThreadUpdater.coffee
@@ -153,7 +153,7 @@ ThreadUpdater =
     ThreadUpdater.count()
     ThreadUpdater.set 'timer', '...'
     ThreadUpdater.req?.abort()
-    url = "//api.4chan.org/#{ThreadUpdater.thread.board}/res/#{ThreadUpdater.thread}.json"
+    url = "//a.4cdn.org/#{ThreadUpdater.thread.board}/res/#{ThreadUpdater.thread}.json"
     ThreadUpdater.req = $.ajax url,
       onabort:   ThreadUpdater.cb.load
       onloadend: ThreadUpdater.cb.load
diff --git a/src/Monitoring/ThreadWatcher.coffee b/src/Monitoring/ThreadWatcher.coffee
index ad9e710ee..3eac7ae4c 100644
--- a/src/Monitoring/ThreadWatcher.coffee
+++ b/src/Monitoring/ThreadWatcher.coffee
@@ -100,7 +100,7 @@ ThreadWatcher =
     return if data.isDead
     {fetchCount} = ThreadWatcher
     fetchCount.fetching++
-    $.ajax "//api.4chan.org/#{boardID}/res/#{threadID}.json",
+    $.ajax "//a.4cdn.org/#{boardID}/res/#{threadID}.json",
       onloadend: ->
         fetchCount.fetched++
         if fetchCount.fetched is fetchCount.fetching