DNS Report: mcgraw-hill.com

Generated: 2026-08-12T03:59:13-05:00

49/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/301 IPv4 address(es) detected.
ERRORIPv6 (AAAA)0/100 IPv6 address(es) detected.
OKName server redundancy20/204 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
ERRORDNSSEC chain0/15Both DS and DNSKEY are required.
ERRORCAA policy0/5Certificate authority restriction.
OKDNS propagation10/10Agreement between public resolvers.
OKMX records20/202 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
ERRORDKIM0/20No tested DKIM selector responded.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
ERRORValid TLS certificate0/55No valid certificate was retrieved.
ERRORCertificate lifetime0/10Full points require at least 30 days remaining.
ERRORHTTP security headers0/350 of 9 evaluated headers detected.
OKPTR reverse DNS30/30PTR: crs.ultradns.net
WARNINGIPv4 diversity20/35Two or more IPv4 addresses receive full points.
ERRORIPv6 connectivity0/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
ERRORHTTP response0/40No successful HTTP response.
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
204.74.99.100
AAAA
CNAME
MX
10 mxb-00363701.gslb.pphosted.com.
10 mxa-00363701.gslb.pphosted.com.
TXT
"v=spf1 ip4:192.243.80.160/28 ip4:192.243.88.160/28 ip4:20.157.64.168/32 ip4:192.243.87.2/32 ip4:192.243.86.2/32 -all"
"MS=ms88994943"
NS
pdns85.ultradns.org.
pdns85.ultradns.net.
pdns85.ultradns.com.
pdns85.ultradns.biz.
SOA
pdns85.ultradns.com. hostmaster.mheducation.com. 2015112726 86400 86400 86400 3600
CAA
DS
DNSKEY
RRSIG
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP