docs/sql-manual/sql-functions/ip-functions/is-ipv4-compat.md

---
{
"title": "IS_IPV4_COMPAT",
"language": "en"
}
---

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## IS_IPV4_COMPAT

IS_IPV4_COMPAT

### Description

#### Syntax

`VARCHAR IS_IPV4_COMPAT(INET6_ATON(VARCHAR ipv4_addr))`

This function takes an IPv6 address represented in numeric form as a binary string, as returned by INET6_ATON(). 
It returns 1 if the argument is a valid IPv4-compatible IPv6 address, 0 otherwise (unless expr is NULL, in which case the function returns NULL). 
IPv4-compatible addresses have the form ::ipv4_address.

### Example

```sql
mysql> SELECT IS_IPV4_COMPAT(INET6_ATON('::ffff:10.0.5.9')) AS is_result;
+-----------+
| is_result |
+-----------+
|         0 |
+-----------+
1 row in set (0.02 sec)

mysql> SELECT IS_IPV4_COMPAT(INET6_ATON('::10.0.5.9')) AS is_result;
+-----------+
| is_result |
+-----------+
|         1 |
+-----------+
1 row in set (0.03 sec)
```

### Keywords

IS_IPV4_COMPAT, IP