ipv6Prefix64 property

String? get ipv6Prefix64

Extract /64 prefix for IPv6 deduplication Returns null if not an IPv6 address

Implementation

String? get ipv6Prefix64 {
  final v6 = ip6;
  if (v6 == null) return null;

  // Split by colon and take first 4 groups (64 bits)
  final parts = v6.split(':');
  if (parts.length < 4) return null;

  return parts.take(4).join(':');
}