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82
Total
70
DNS
90
Email
77
Security
65
Network
100
Availability
Domaingmc.com
IPv42
IPv60
MX records1
StatusActive
Domain technical report

Access Denied

gmc.com

Generated: 2026-08-10T19:10:48-05:00 · Cached result

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IPv42
IPv60
MX1
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

1 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

163 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: tld-redir-prdmx.ext.gm.com

✓
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)
198.208.74.205
198.208.73.147

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 gmc-com.mail.protection.outlook.com.

TXT

13 record(s)
"_g21z9t4rqsyhgnu76pnm6y57chwfp0y"
"_zux2pth5au6csqj2djeapbezh6cjtel"
"_uqdcnylfpyx2cgotaae8bxk2f10cecm"
"00DDn00000DCkt8MAD"
"_yk5er9gquhwv6352ma95aqk96nebu6v"
"_ruu4l8kcygens0d25lmqd7ser3szp9a"
"google-site-verification=ll44AfFeqY0AolO-MM0pElP76i8jLF2Nr-iV3oroa18"
"facebook-domain-verification=s3uis2o1li831x52udl8e0dyhhks3h"
"v=spf1 mx include:_spf-a.gm.com include:_spf-b.gm.com include:spf.protection.outlook.com include:_spf.google.com ~all"
"_2v7ajttodprjkhb8wf9alrm6vyzgpw8"
"_8fzr26d6s926dwye8v5aker9tqk0y0y"
"google-site-verification=C_YUElDdW0CQGuE35_mOAjUI9M6IzmQhW4stkaFmbdY"
"google-site-verification=PqoqdO_EE5ZMnwFHAT5ZpYcoUeMJmv6prg2pxMKAj4I"

NS

4 record(s)
nsx4.gm.com.
nsx2.gm.com.
nsx1.gm.com.
nsx3.gm.com.

SOA

1 record(s)
nsx1.gm.com. dnsadm.gm.com. 401 3600 3600 1209600 300

CAA

0 record(s)
—

Not configured

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 mx include:_spf-a.gm.com include:_spf-b.gm.com include:spf.protection.outlook.com include:_spf.google.com ~all

DMARC

Configured
v=DMARC1;p=reject;fo=1;ri=3600;rua=mailto:dmarc_rua@emaildefense.proofpoint.com,mailto:dmarc_rua@gm.com;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com,mailto:dmarc_ruf@gm.com

DKIM

Selector selector1
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCfIQ7whLGl59761LKk7Npbrbw52rNK+AMCUCKuDg4Iex4JeSQ1BkTu4TIEri4hc9dUFbe21o+zHGWFo4FadF+eiFW8521SAEv6iu8G+1OwL4ZYeiX7uLn3PuTnR8343dQoWiM9SAdIyRPPcxzHr1TVsqtDA6fZVuINB84QPlJcoQIDAQAB; n=1024,1457652151,1473549751

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Access Denied
Description
Final URL
https://www.gmc.com/
HTTP status
403

HTTP

Status
HTTP/2 200
Final URL
https://www.gmc.com/
Version
3
Server
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert Inc
CN
gm.com
Valid from
2026-07-06T19:00:00-05:00
Valid until
2027-01-21T17:59:59-06:00
Days remaining
163
Protocol
TLSv1.2
Cipher
ECDHE-RSA-AES128-GCM-SHA256

Security headers

3 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
—
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
198.208.73.147, 198.208.74.205
87,55 ms
Cloudflare
1.1.1.1
198.208.73.147, 198.208.74.205
57,27 ms
Quad9
9.9.9.9
198.208.73.147, 198.208.74.205
55,36 ms
OpenDNS
208.67.222.222
198.208.73.147, 198.208.74.205
34,70 ms
AdGuard
94.140.14.14
198.208.73.147, 198.208.74.205
73,17 ms

IP, geolocation and ASNAssociated network information

198.208.74.205

No data
success
No
country
region
city
asn
organization
isp

198.208.73.147

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

gmc-com.mail.protection.outlook.com

Port 25: Closed/unreachable - 25.1 ms - 
Port 465: Closed/unreachable - 4038.8 ms - 
Port 587: Closed/unreachable - 4054.5 ms -

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