IPv4 Addresses
upgrade.guide. 300 IN A 104.18.8.28 upgrade.guide. 300 IN A 104.18.9.28
IPv6 Addresses
upgrade.guide. 300 IN AAAA 2606:4700:0:0:0:0:6812:81C upgrade.guide. 300 IN AAAA 2606:4700:0:0:0:0:6812:91C
Name Servers
upgrade.guide. 1200 IN NS burt.ns.cloudflare.com. upgrade.guide. 1200 IN NS mimi.ns.cloudflare.com.
SOA Details
upgrade.guide. 1200 IN SOA burt.ns.cloudflare.com. dns.cloudflare.com. 2400321802 10000 2400 604800 1800
Certificate Authority Authorization
No CAA records were returned at this registrable domain name. With no CAA policy, any public certificate authority (CA) may issue TLS certificates for names under this zone unless a parent publishes CAA; add issue / issuewild / iodef records to restrict issuance.
DMARC
Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
100Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
Forensic (per-failure) reports. Often omitted for privacy or volume.
upgrade.guide. 60 IN DMARC v=DMARC1; p=quarantine; rua=mailto:[email protected]
DKIM
No DKIM TXT with `v=DKIM1` was returned for the selector names we probe automatically.
SPF (Sender Policy Framework)
No SPF TXT record was returned (`v=spf1` / `spf2.0/`). SPF tells receivers which hosts may send mail for this domain; without it, aligned DMARC and spoofing defenses are weaker.
MTA-STS
This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).
DNSSEC Public Keys
upgrade.guide. 1200 IN DNSKEY 256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA== upgrade.guide. 1200 IN DNSKEY 257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
Delegation Signer
upgrade.guide. 1200 IN DS 2371 13 2 E15D1F9CA21BD498D9F16879D18BF3285EBC664BA85F87A91BC78A4A3D82D817
DNSSEC Next Secure
upgrade.guide. 1200 IN NSEC .upgrade.guide ["TYPE65", "TYPE64", "TYPE61", "TYPE60", "TYPE59", "TYPE55", "TYPE53", "TYPE52", "DNSKEY", "NSEC", "RRSIG", "TYPE44", "TYPE37", "TYPE35", "SRV", "TYPE29", "AAAA", "TXT", "MX", "TYPE13", "SOA", "NS", "A", "CAA", "TYPE256"]