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Total

DNS

Email

Security

Network

100

Availability

Domainhmhco.com

IPv42

IPv60

MX records2

StatusActive

Domain technical report

HMH: K-12 Learning Company

hmhco.com

A K–12 learning company, HMH delivers integrated curriculum, assessment, and professional learning to help educators create growth for every student.

Generated: 2026-08-10T12:23:32-05:00 · Cached result

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IPv42

IPv60

MX2

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

DMARC0 / 25 pts · Mail

DMARC policy not found.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

27 day(s) remaining.

Certificate lifetime6 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

45.60.101.203
45.60.11.203

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

5 us-smtp-inbound-2.mimecast.com.
5 us-smtp-inbound-1.mimecast.com.

TXT

42 record(s)

"fluency-domain-verification-p3edjb=C69njd7xl6pYYPFQifwU9QmUE"
"apple-domain-verification=P7EQHRcSw1MEhYAw"
"_zjf8wvnzc5hzfuordx7qti6vz2lo9dd"
"OSSRH-77297"
"extensis-domain-verification=283f9982-b8c8-4996-8611-6c3b16ca80a8"
"jamf-site-verification=ypSPyAynUFATrS5zB59L9g"
"v=spf1 ip4:209.235.126.1 ip4:209.235.126.2 ip4:209.235.126.7 ip4:209.235.126.8 ip4:209.235.126.9 ip4:209.235.126.10 include:_netblocks.hmhco.com include:_spf.salesforce.com include:us._netblocks.mimecast.com include:6573d6.workshop-spf.net ~all"
"globalsign-domain-verification=1111620e7587ddb0d56bfd6fcd6d4ae4"
"smartsheet-site-validation=Y9J8B1EtJP8RjvrCy7bJNAGuwfZwPPw0"
"google-site-verification=jWaPYj9EqDhNlqii90MwSAGGqILGT3qvjv3sc9AjwVk"
"_9y67qztkt2btxbaml8r2vjg40pzjd3c"
"canva-site-verification=XAvMwkZKNaFlNW4YQojH3g"
"_reegr6qrngjjfjigyyak4y4149z96f0"
"fe12f446-397f-4147-8aaa-a09a152e0e4f "
"49NBsw/Se/C6JS0bY1ERCAIm4lXSNiDJB3VJ4548dGRG3LGlCjuddY3HFB6JrGLJJns1X0QVEaK3c3mAxiDdpA=="
"_9sie6t2ppawjloiuavjlv2dx3qite9b"
"cisco-ci-domain-verification=1e77c8c1819f3634ebaf3190e828520ae8b44db10725f96505c5668952e1a16a"
"_88p140xxu23fri4pwb8p9kiy0t0aq89"
"docusign_verification=dm5d176s-eg0e-l9sg-abdi-hd56sz2tt0wc"
"docusign=9a0d3862-ce0a-4272-be65-e9d0ee8109b9"
"globalsign-domain-verification=A5690202F4D1340FC95C7147711395FE"
"MS=ms65451366"
"atlassian-domain-verification=BNYS2ZxDgYF0MABftk2Zoz5k5a1O4ISi5g0vBS7vRKxvosDsl020tMm88EaCzkFE"
"_yrydfmt6ek9t9k9oiffq7j710sdp5r2"
"pendo-domain-verification=-c2MowabHj26bsKA847E49izAIM"
"google-site-verification=9xAnKLlO-n0fb9ivg6304GUrAOYJzqF00f9NzD0YqwU"
"openai-domain-verification=dv-LvPgut8vxG5Id4c62TexDLU0"
"globalsign-domain-verification=ace3534fbff0e03574dcd4f8bb8848b7"
"_xk90kd0yh344144zsllem3xd0tur9ye"
"canva-site-verification=nDn0iJqSi1AhFR_cAw5isQ"
"adobe-idp-site-verification=dcee0a2f77d8062795e70509a65d7f6913450b5485badb2058f23588f060c8b9"
"atlassian-domain-verification=CBbj/iXZ5lGubFrU2QeWACCkSiIcanWzOa3PxRDfyjxeJsv4d/vf4xiiortak0h1"
"canva-site-verification=7BqVD8X2bt48CNLNCochRw"
"pexip-ms-tenant-domain-verification=f05dded6-08d7-4594-b27b-6d2f601a4919"
"facebook-domain-verification=j9y57ganvf1td5819xs1y7ro1oaocs"
"docusignv=52c16912-2c65-4f50-b613-fa56c465c707"
"anthropic-domain-verification-5724sj=l3u5vPhGuyCjhW0PY7kwoP6Xm"
"globalsign-domain-verification=C7DBEB65A538212CBB663B0F083CCB9B"
"_o890m8p0326f3zjpvgg9visthiabpps"
"miro-verification=788279500223085801eb9b034064d4a96bdabaf3"
"amazonses:zvT1yYoxLfumWiB6ESAVrkUzwpwo6ClRCUxHEsYjaFY="
"google-site-verification=WAHW1EO8Bhocy1PlQISnzb50g26m17-znBENRYcynKI"

NS

4 record(s)

ns-341.awsdns-42.com.
ns-1193.awsdns-21.org.
ns-1900.awsdns-45.co.uk.
ns-951.awsdns-54.net.

SOA

1 record(s)

ns-951.awsdns-54.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

SPF

Configured

v=spf1 ip4:209.235.126.1 ip4:209.235.126.2 ip4:209.235.126.7 ip4:209.235.126.8 ip4:209.235.126.9 ip4:209.235.126.10 include:_netblocks.hmhco.com include:_spf.salesforce.com include:us._netblocks.mimecast.com include:6573d6.workshop-spf.net ~all

DMARC

Not configured

—

Not configured

DKIM

Selector selector2

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDAgwmXCQZtAlCaOrkFCzfHYaE6iWqWE591ln9pq0W6RvA8utre3bWDJCe1GX8RK4oHcWQfrh5FdmKss0mQET5dxw6XWDOgJmJTTJ1Z+NjVud3btm7YGIV1kwgN85tdQXuOTlo91848A8QuMNtNHS2mwY+SldYSRc80IuUq3qisHQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

HMH: K-12 Learning Company

Description

A K–12 learning company, HMH delivers integrated curriculum, assessment, and professional learning to help educators create growth for every student.

Final URL

https://www.hmhco.com/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.hmhco.com/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

GlobalSign nv-sa

imperva.com

Valid from

2026-06-08T14:04:45-05:00

Valid until

2026-09-06T14:04:45-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

2 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

—

X-Frame-OptionsNot detected

—

Referrer PolicyNot detected

✓

Permissions PolicyImplemented

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

45.60.101.203, 45.60.11.203

97,31 ms

Cloudflare

1.1.1.1

45.60.101.203, 45.60.11.203

52,86 ms

Quad9

9.9.9.9

45.60.101.203, 45.60.11.203

70,12 ms

OpenDNS

208.67.222.222

45.60.101.203, 45.60.11.203

49,79 ms

AdGuard

94.140.14.14

45.60.101.203, 45.60.11.203

71,65 ms

IP, geolocation and ASNAssociated network information

45.60.101.203

No data

success

country

region

city

asn

organization

isp

45.60.11.203

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

us-smtp-inbound-2.mimecast.com

Port 25: Closed/unreachable - 30.7 ms - 
Port 465: Closed/unreachable - 4017.8 ms - 
Port 587: Closed/unreachable - 29.6 ms - 220 us-smtp-inbound-1.mimecast.com ESMTP; Mon, 10 Aug 2026 13:23:31 -0400

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