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Total

DNS

Email

Security

Network

Availability

Domaincoursehero.com

IPv42

IPv60

MX records7

StatusActive

Domain technical report

Attention Required! | Cloudflare

coursehero.com

Generated: 2026-08-10T03:56:17-05:00 · Cached result

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IPv42

IPv60

MX7

NS2

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

2 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 policy5 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

7 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

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

59 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 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 response0 / 40 pts · Availability

HTTP/2 403

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

104.17.142.115
104.17.143.115

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

7 record(s)

5 alt1.aspmx.l.google.com.
10 aspmx2.googlemail.com.
10 alt3.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.
10 alt4.aspmx.l.google.com.
1 aspmx.l.google.com.
10 aspmx3.googlemail.com.

TXT

22 record(s)

"apple-domain-verification=J9HXwKKbosffcUqk"
"hzlh1s4kn3zrz66vng5sdxkc1fc5088m"
"google-site-verification=Gyhx5Lm9qP9uXBuUizeZ4rO-RyZBKZtClazCwKnDcek"
"globalsign-domain-verification=9AC94274374646C0309FBF52D4C347E5"
"ZOOM_verify_5AZchnB9Sbu3g5a7AT4-tQ"
"adobe-idp-site-verification=8b9b597326c953485203409a584c256ae5300d4628d2c614db42c35dbfc4d827"
"atlassian-domain-verification=HuZkEy3RvMSIX6gZ/iF9B/EYH1awgocgR2HXxCaOZLQhFSSaizLaV68WLJ67OdV5"
"beam-verification=ztlMjatDnztNkQvw8YU4sYwvBQQ6BpBswpmOGXUKrBHAnKhx"
"globalsign-domain-verification=2eaa5b27a77c2daddf7a4de4d1d0b631"
"_globalsign-domain-verification=vfSqdWg_oFkzJ2vuWdXgelF4hXGoMazrjSFpCwGkIr"
"cursor-domain-verification-mqkys8=xlPNXlbiVQnaxZlmsW9WuEsaz"
"globalsign-domain-verification=6f8ab1bf5972d1fec2bed8c50fc8f17f"
"globalsign-domain-verification=3C4ABCC9F5A84CF68ED95BDA94D6AA6F"
"5652918DDF"
"anthropic-domain-verification-pf9xw7=KfxDXaYmxfEGnWRVFqIufoEmc"
"google-site-verification=3pQ5xK_nyepze4YXPQl_B0s_ctK-MbTPs1wcsI4rtc0"
"globalsign-domain-verification=6I41XwGS3W3RH3qcFMFl4OEqtMzo9xTMeWN8-mrBax"
"miro-verification=cd41ffb512f978da767f4d40547aad9ce48ac4e2"
"globalsign-domain-verification=6902DC280BCC210C04267DF54E536CF3"
"globalsign-domain-verification=d02224fcdd31e8326ec4e62e02896e6e"
"notion-domain-verification=GFEyibYsGkk66J48iv0lbsClXxUjI4AuMhpkEVzsWdV"
"v=spf1 a mx include:_spf.google.com include:mail.zendesk.com include:amazonses.com include:sendgrid.net ip4:104.130.122.0/23 ip4:146.20.112.0/26 ip4:141.193.32.0/23 ip4:161.38.192.0/20 ip4:209.61.151.0/24 ip4:166.78.68.0/22 ip4:198.61.254.0/23 ip4:192.237" ".158.0/23 ip4:23.253.182.0/23 ip4:104.130.96.0/28 ip4:146.20.113.0/24 ip4:146.20.191.0/24 ip4:159.135.224.0/20 ip4:69.72.32.0/20 ip4:167.89.73.35 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:223.165.123.209 ip4:223.165.123.213 ip4:223.165." "123.92 ip4:223.165.123.205 ip4:223.165.124.173 ip4:223.165.123.209/32 ip4:223.165.123.213/32 ip4:223.165.123.92/32 ip4:223.165.123.205/32 ip4:223.165.124.173/32 ~all"

NS

2 record(s)

ali.ns.cloudflare.com.
bob.ns.cloudflare.com.

SOA

1 record(s)

ali.ns.cloudflare.com. dns.cloudflare.com. 2411390689 10000 2400 604800 1800

CAA

16 record(s)

0 issue "letsencrypt.org"
0 issuewild "comodoca.com"
0 issue "godaddy.com"
0 issuewild "pki.goog; cansignhttpexchanges=yes"
0 issue "globalsign.com"
0 issue "ssl.com"
0 issue "amazontrust.com"
0 issue "digicert.com; cansignhttpexchanges=yes"
0 issuewild "globalsign.com"
0 issuewild "ssl.com"
0 issuewild "letsencrypt.org"
0 issue "pki.goog; cansignhttpexchanges=yes"
0 issuewild "digicert.com; cansignhttpexchanges=yes"
0 issuewild "godaddy.com"
0 issue "comodoca.com"
0 issuewild "amazontrust.com"

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 a mx include:_spf.google.com include:mail.zendesk.com include:amazonses.com include:sendgrid.net ip4:104.130.122.0/23 ip4:146.20.112.0/26 ip4:141.193.32.0/23 ip4:161.38.192.0/20 ip4:209.61.151.0/24 ip4:166.78.68.0/22 ip4:198.61.254.0/23 ip4:192.237.158.0/23 ip4:23.253.182.0/23 ip4:104.130.96.0/28 ip4:146.20.113.0/24 ip4:146.20.191.0/24 ip4:159.135.224.0/20 ip4:69.72.32.0/20 ip4:167.89.73.35 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:223.165.123.209 ip4:223.165.123.213 ip4:223.165.123.92 ip4:223.165.123.205 ip4:223.165.124.173 ip4:223.165.123.209/32 ip4:223.165.123.213/32 ip4:223.165.123.92/32 ip4:223.165.123.205/32 ip4:223.165.124.173/32 ~all

DMARC

Configured

v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:89dz7-9436@rua.dmarc.emailanalyst.com,mailto:ac298d14@mxtoolbox.dmarc-report.com,mailto:rua@coursehero.com,mailto:redwywtj@ag.dmarcian.com,mailto:lifecycledmarc@coursehero.com; ruf=mailto:89dz7-9436@ruf.dmarc.emailanalyst.com,mailto:ac298d14@forensics.dmarc-report.com,mailto:rua@coursehero.com,mailto:redwywtj@fr.dmarcian.com,mailto:lifecycledmarc@coursehero.com; ri=86400

DKIM

Selector google

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxFEzSKYzqi3tNmUnsIaJVyKvo6Ju+ogPJNE4ucsbCkGaIk/hbLzbqKeUKDhuv/gFtvEjmVmiCKJSPstJx7MPym8VMjvIQE3YZBFRs4SkIVbba6cfAzDh+YCkq6ajD7Z12e75hPPO446KHlOp4r84toMbDzJwsYRToT9dSviR1PPovb14iHp4lgKItjdFzNpK+qIpUnLwgOoxZASF8uZ+welpw43D6f6JtD/bOkx7OACvGxj+HpwjC5lpb1I9txXT7rkdg66iC5A59hYFGSpTrT9+VsQhd438TotDJ4BaRgeDp+nXhfTHnhC+OQAKuFdLTMx3VQGhic5IMhY4MFx+TwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Attention Required! | Cloudflare

Description

Final URL

https://www.coursehero.com/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://www.coursehero.com/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Google Trust Services

coursehero.com

Valid from

2026-07-10T15:53:26-05:00

Valid until

2026-10-08T16:53:12-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

3 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

—

X-Content-Type-OptionsNot detected

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

—

Permissions PolicyNot detected

—

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

104.17.142.115, 104.17.143.115

60,28 ms

Cloudflare

1.1.1.1

104.17.142.115, 104.17.143.115

44,12 ms

Quad9

9.9.9.9

104.17.142.115, 104.17.143.115

50,83 ms

OpenDNS

208.67.222.222

104.17.142.115, 104.17.143.115

42,86 ms

AdGuard

94.140.14.14

104.17.142.115, 104.17.143.115

96,92 ms

IP, geolocation and ASNAssociated network information

104.17.142.115

No data

success

country

region

city

asn

organization

isp

104.17.143.115

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

alt1.aspmx.l.google.com

Port 25: Closed/unreachable - 1 ms - 
Port 465: Closed/unreachable - 4021.1 ms - 
Port 587: Closed/unreachable - 4002.1 ms -

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