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85
Total
100
DNS
50
Email
81
Security
100
Network
100
Availability
Domaindns.google
IPv42
IPv62
MX records0
StatusActive
Domain technical report

Google Public DNS

dns.google

Generated: 2026-08-09T14:41:41-05:00 · Cached result

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IPv42
IPv62
MX0
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

2 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 chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

!
MX records0 / 20 pts · Mail

0 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

63 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: dns.google

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓
IPv6 connectivity35 / 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)
8.8.8.8
8.8.4.4

AAAA

2 record(s)
2001:4860:4860::8888
2001:4860:4860::8844

CNAME

0 record(s)
—

Not configured

MX

0 record(s)
—

Not configured

TXT

2 record(s)
"v=spf1 -all"
"https://xkcd.com/1361/"

NS

4 record(s)
ns2.zdns.google.
ns3.zdns.google.
ns1.zdns.google.
ns4.zdns.google.

SOA

1 record(s)
ns1.zdns.google. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300

CAA

2 record(s)
128 issue "pki.goog"
0 issue "pki.goog"

DS

1 record(s)
56044 8 2 1B0A7E90AA6B1AC65AA5B573EFC44ABF6CB2559444251B997103D2E4 0C351B08

DNSKEY

2 record(s)
257 3 8 AwEAAbwcDvL6jj3SGrhFmpiqahBVGlEIrt5OoVmgCINPJozYpXozSsb0 yVkK86vOGcaYZXFoaUisWp0s3GJ5pYD74CyHc1s0CIbGdzNOXthhH2rA hR2YgsnKJUmv8Odo1bFbTy9vzrWd3qQ/Mgp9fOFTE7Dkys2c9bpJmvw0 WScdW4xIxTXHilwIhqmrxeNjyRlgb3C8r2NWxjj4sqcATN9BSgk4fLvv B7UneWqWgM8kSd29bdL907nsg7eSuzETwTAHkU2mGHdC5i3kvRDgTqPC 2zwk+tF5Rau6x78XkZJm5pcyD0AYsmusJqjGa60FFe759CZQ0Y8K7cZP vom/cozR3lM=
256 3 8 AwEAAYg40+Kl2IE256q7uLBVR2IoFmcIPDnyjgfWLkkGcadKnNaLhQ40 4TwsO8CXl8krxKVdm0USLszARnoXZZ4fUYIyuqu45qaoz9aO1waPz43/ mw0oeOcW9JYvEf+XyNFWKzActpizjMFDxDIWIbL1Pq+eZJCRUTeyDSaW X7Ds6Pbl

RRSIG

2 record(s)
AAAA 8 2 900 20260828194251 20260806194251 58953 dns.google. RHcMOfPg4N1QbuLWDX9nb7+Wnw5so4lWtDnVbLDfhvjcBtDiu6r9jTi+ eot27JJwwfuJ/+dkzuaCkiOj0T9AJ8+BtHZXhzYQ/GxxJv3Dx7spNHO9 LeBWMHMLDMP4LWNWEFwmq8tnP7BGGsouZb6mGItJfxE9R7wtLROp2b72 4a4=
A 8 2 900 20260828194251 20260806194251 58953 dns.google. EWs2G8rzRLCbIHpHr9ZcKULfPjaqexbPuEilYUTMPUmHfhiFtE/XOcfJ DP4RwrMII8/lSlO0Jsnmafw7wcHZv4h2wOEAjLQc0ZDlk79Zz/eFvfmC 9PXfquJYSpe3f/J5AFrsczJJl6rIHxCEsgcYYkQJ9qWQOz3zJU7y6A7x k+o=

NSEC

1 record(s)
_dmarc.dns.google. A NS SOA TXT AAAA RRSIG NSEC DNSKEY CDS CAA

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 -all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Google Public DNS
Description
Final URL
https://dns.google/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://dns.google/
Version
3
Server
scaffolding on HTTPServer2
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
dns.google
Valid from
2026-07-20T13:08:33-05:00
Valid until
2026-10-12T13:08:32-05:00
Days remaining
63
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
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
8.8.4.4, 8.8.8.8
40,51 ms
Cloudflare
1.1.1.1
8.8.4.4, 8.8.8.8
33,30 ms
Quad9
9.9.9.9
8.8.4.4, 8.8.8.8
27,26 ms
OpenDNS
208.67.222.222
8.8.4.4, 8.8.8.8
25,65 ms
AdGuard
94.140.14.14
8.8.4.4, 8.8.8.8
40,83 ms

IP, geolocation and ASNAssociated network information

8.8.8.8

No data
success
No
country
region
city
asn
organization
isp

8.8.4.4

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

dns.google

Port 25: Closed/unreachable - 1 ms - 
Port 465: Closed/unreachable - 4009.9 ms - 
Port 587: Closed/unreachable - 4020.7 ms -

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