parse_ipv6()

Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Converts IPv6 or IPv4 string to a canonical IPv6 string representation.

parse_ipv6(ip)

Learn more about syntax conventions.

IP-prefix notation (also known as CIDR notation) is a concise way of representing an IP address and its associated network mask. The format is <base IP>/<prefix length>, where the prefix length is the number of leading 1 bits in the netmask. The prefix length determines the range of IP addresses that belong to the network.

For IPv4, the prefix length is a number between 0 and 32. So the notation 192.168.2.0/24 represents the IP address 192.168.2.0 with a netmask of 255.255.255.0. This netmask has 24 leading 1 bits, or a prefix length of 24.

For IPv6, the prefix length is a number between 0 and 128. So the notation fe80::85d:e82c:9446:7994/120 represents the IP address fe80::85d:e82c:9446:7994 with a netmask of ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00. This netmask has 120 leading 1 bits, or a prefix length of 120.

If conversion is successful, the result is a string representing a canonical IPv6 network address. If conversion isn't successful, the result is an empty string.

datatable(ipv4: string)
[
    '192.168.255.255', '192.168.255.255/24', '255.255.255.255'
]
| extend ipv6 = parse_ipv6(ipv4)

Output