DNS Report: libretexts.org

Generated: 2026-08-09T10:17:09-05:00

89/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/302 IPv4 address(es) detected.
OKIPv6 (AAAA)10/102 IPv6 address(es) detected.
OKName server redundancy20/202 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
OKDNSSEC chain15/15DS and DNSKEY detected.
OKCAA policy5/5Certificate authority restriction.
OKDNS propagation10/10Agreement between public resolvers.
OKMX records20/205 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
OKDKIM20/20A DKIM selector was verified.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/5545 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
WARNINGHTTP security headers12/353 of 9 evaluated headers detected.
ERRORPTR reverse DNS0/30PTR not detected.
OKIPv4 diversity35/35Two or more IPv4 addresses receive full points.
OKIPv6 connectivity35/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
OKHTTP response40/40HTTP/2 200
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
172.66.163.119
104.20.33.226
AAAA
2606:4700:10::6814:21e2
2606:4700:10::ac42:a377
CNAME
MX
10 alt3.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt4.aspmx.l.google.com.
TXT
"v=spf1 include:_spf.google.com include:mailgun.org include:spf.mailjet.com ~all"
"MS=24EEDA32A1B64093067F80942348F46B7C53AB15"
"atlassian-domain-verification=K5DMrg/KPVIJcji/XYQ5GaWR5qtDtay27IEufDV87yqJmqX4uKhjhgZxNMajMm2w"
"1password-site-verification=YDXLXEOPD5A4RIQ4DGBXTTLXAU"
"google-site-verification=zIAad45IZShT-a7Q2GnGn7XjbofS1NobaXCuldPdF58"
"google-site-verification=ej-DagC8sD_MaouJikcyiz-sulM4oKdtg95K_XZJLjc"
NS
ridge.ns.cloudflare.com.
celine.ns.cloudflare.com.
SOA
celine.ns.cloudflare.com. dns.cloudflare.com. 2411528057 10000 2400 604800 1800
CAA
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 iodef "mailto:delmar@libretexts.org"
0 issue "amazon.com"
0 issuewild "ssl.com"
0 issuewild "amazontrust.com"
0 issuewild "amazonaws.com"
0 issuewild "digicert.com; cansignhttpexchanges=yes"
0 issuewild "letsencrypt.org"
0 issue "letsencrypt.org"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issue "sectigo.com"
0 issue "comodoca.com"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "awstrust.com"
0 issue "ssl.com"
0 issuewild "comodoca.com"
0 issuewild "amazon.com"
DS
2371 13 2 2D37862D03FFA3FD641C294583DA6BC478F67DF32406EB794E80F6F5 4FE46415
DNSKEY
256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==
RRSIG
NSEC
\000.libretexts.org. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA
NSEC3
SRV
NAPTR
TLSA
SSHFP