versioned_docs/version-3.0/sql-manual/sql-functions/ip-functions/ipv4-string-to-num-or-default.md

---
{
"title": "IPV4_STRING_TO_NUM_OR_DEFAULT",
"language": "en"
}
---

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## IPV4_STRING_TO_NUM_OR_DEFAULT

IPV4_STRING_TO_NUM_OR_DEFAULT

### Description

#### Syntax

`BIGINT IPV4_STRING_TO_NUM_OR_DEFAULT(VARCHAR ipv4_string)`

Takes a string containing an IPv4 address in the format A.B.C.D (dot-separated numbers in decimal form). Returns a BIGINT number representing the corresponding IPv4 address in big endian.

#### Notice

If the input string is not a valid IPv4 address or `NULL`, `0` is returned.

### Example

```sql
mysql> select ipv4_string_to_num_or_default('192.168.0.1'); 
+----------------------------------------------+ 
| ipv4_string_to_num_or_default('192.168.0.1') | 
+----------------------------------------------+ 
| 3232235521                                   | 
+----------------------------------------------+ 
1 row in set (0.01 sec)

mysql> select str, ipv4_string_to_num_or_default(str) from ipv4_str; 
+-----------------+------------------------------------+ 
|str              | ipv4_string_to_num_or_default(str) | 
+-----------------+------------------------------------+ 
| 0.0.0.0         | 0                                  | 
| 127.0.0.1       | 2130706433                         | 
| 255.255.255.255 | 4294967295                         | 
| invalid         | 0                                  | 
+-----------------+------------------------------------+ 
4 rows in set (0.01 sec)

mysql> select addr_src, ipv4_string_to_num_or_default(addr_src) from ipv4_string_test where addr_src is null;
+----------+-----------------------------------------+
| addr_src | ipv4_string_to_num_or_default(addr_src) |
+----------+-----------------------------------------+
| NULL     |                                       0 |
+----------+-----------------------------------------+
1 row in set (0.09 sec)
```

### Keywords

IPV4_STRING_TO_NUM_OR_DEFAULT, IP