IPv6 (simplified)

Common full and compressed IPv6 forms.

Pattern

/\b(?:[0-9a-f]{1,4}:){7}[0-9a-f]{1,4}\b|\b(?:[0-9a-f]{1,4}:){1,7}:\b|\b::(?:[0-9a-f]{1,4}:){0,6}[0-9a-f]{1,4}\b/

Full 2001:0db8:85a3:0000:0000:8a2e:0370:7334
Compressed 2001:db8::1
Not v6 192.168.0.1

Simple FQDN matcher for hostnames in prose.

Find YYYY-MM-DD dates in logs and prose.

ISO-8601 timestamps with optional timezone.

Octet-bounded IPv4 matcher for log scraping.

Colon or hyphen separated IEEE MAC addresses.

Pull severity tokens from structured logs.