Summary
| Datatype: | int(4) unsigned | 
|---|---|
| Storing IP: | INET_ATON('192.168.1.39') | 
| Getting IP: | INET_NTOA(3232235815) | 
Practical example
Schema
mysql> SHOW COLUMNS FROM clickcounter_clicks;
+---------+-----------------+------+-----+---------+----------------+
| Field   | Type            | Null | Key | Default | Extra          |
+---------+-----------------+------+-----+---------+----------------+
| id      | int(11)         | NO   | PRI | NULL    | auto_increment |
| link_id | int(11)         | NO   |     |         |                |
| date    | date            | NO   |     |         |                |
| ip      | int(4) unsigned | NO   |     |         |                |
+---------+-----------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)
Storing
mysql> INSERT INTO clickcounter_clicks(`date`, `ip`)
     > VALUES (NOW(), INET_ATON('192.168.1.39'));
Query OK, 1 row affected, 1 warning (0.00 sec)
Retrieving
mysql> SELECT date, INET_NTOA(ip) AS ip FROM clickcounter_clicks;
+------------+--------------+
| date       | ip           |
+------------+--------------+
| 2009-06-16 | 192.168.1.39 |
+------------+--------------+
1 row in set (0.00 sec)