INT4 is probably enough:

bmomjian · bmomjian · commit c61207b0913b · 2005-05-21T21:31:26.000Z
&lt; * Allow INET + INT4/INT8 to increment the host part of the address, or
&gt; * Allow INET + INT4 to increment the host part of the address, or
diff --git a/doc/TODO b/doc/TODO
@@ -2,7 +2,7 @@
 PostgreSQL TODO List
 ====================
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated:		Fri May 20 23:13:08 EDT 2005
+Last updated:		Sat May 21 17:31:53 EDT 2005
 
 The most recent version of this document can be viewed at
 http://www.postgresql.org/docs/faqs.TODO.html.
@@ -189,7 +189,7 @@ Data Types
 * Prevent INET cast to CIDR if the unmasked bits are not zero, or
   zero the bits
 * Prevent INET cast to CIDR from droping netmask, SELECT '1.1.1.1'::inet::cidr
-* Allow INET + INT4/INT8 to increment the host part of the address, or
+* Allow INET + INT4 to increment the host part of the address, or
   throw an error on overflow
 * Add 'tid != tid ' operator for use in corruption recovery
 * Prevent to_char() on interval from returning meaningless values
diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html
@@ -8,7 +8,7 @@
 <body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
 <h1><a name="section_1">PostgreSQL TODO List</a></h1>
 <p>Current maintainer:     Bruce Momjian (<a href="mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</a>)<br/>
-Last updated:           Fri May 20 23:13:08 EDT 2005
+Last updated:           Sat May 21 17:31:53 EDT 2005
 </p>
 <p>The most recent version of this document can be viewed at<br/>
 <a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
@@ -177,7 +177,7 @@ <h1><a name="section_3">Data Types</a></h1>
   </li><li>Prevent INET cast to CIDR if the unmasked bits are not zero, or
   zero the bits
   </li><li>Prevent INET cast to CIDR from droping netmask, SELECT '<a href="telnet://1.1.1.1">1.1.1.1</a>'::inet::cidr
-  </li><li>Allow INET + INT4/INT8 to increment the host part of the address, or
+  </li><li>Allow INET + INT4 to increment the host part of the address, or
   throw an error on overflow
   </li><li>Add 'tid != tid ' operator for use in corruption recovery
   </li><li>Prevent to_char() on interval from returning meaningless values
