IPv4 Addresses
mathpendium.org. 300 IN A 104.21.6.102 mathpendium.org. 300 IN A 172.67.134.182
IPv6 Addresses
mathpendium.org. 300 IN AAAA 2606:4700:3033:0:0:0:6815:666 mathpendium.org. 300 IN AAAA 2606:4700:3034:0:0:0:AC43:86B6
Name Servers
mathpendium.org. 1200 IN NS clara.ns.cloudflare.com. mathpendium.org. 1200 IN NS igor.ns.cloudflare.com.
SOA Details
mathpendium.org. 1200 IN SOA clara.ns.cloudflare.com. dns.cloudflare.com. 2403120682 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
No DMARC TXT record was returned (expected at `_dmarc.<domain>` with `v=DMARC1`). Without DMARC you cannot publish receiver policy or standard aggregate failure reports (RUA).
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).