Extensions
Examples
```sql
SELECT '127.0.0.1'::INET AS ipv4, '2001:db8:3c4d::/48'::INET AS ipv6;
```  
|   ipv4    |        ipv6        |
|-----------|--------------------|
| 127.0.0.1 | 2001:db8:3c4d::/48 |  
```sql
CREATE TABLE tbl (id INTEGER, ip INET);
INSERT INTO tbl VALUES
(1, '192.168.0.0/16'),
(2, '127.0.0.1'),
(3, '8.8.8.8'),
(4, 'fe80::/10'),
(5, '2001:db8:3c4d:15::1a2f:1a2b');
SELECT * FROM tbl;
```  
| id |             ip              |
|---:|-----------------------------|
| 1  | 192.168.0.0/16              |
| 2  | 127.0.0.1                   |
| 3  | 8.8.8.8                     |
| 4  | fe80::/10                   |
| 5  | 2001:db8:3c4d:15::1a2f:1a2b |