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76
Total
75
DNS
70
Email
73
Security
85
Network
80
Availability
Domaingoogle.cn
IPv41
IPv61
MX records1
StatusActive
Domain technical report

Google

google.cn

Generated: 2026-08-08T19:22:30-05:00 · Cached result

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IPv41
IPv61
MX1
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

1 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 policy5 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 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.

!
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

64 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: pnorda-an-in-f3.1e100.net

i
IPv4 diversity20 / 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/1.1 200 OK

!
HTTPS final URL0 / 20 pts · Availability

Final URL is not HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
142.250.177.227

AAAA

1 record(s)
2607:f8b0:4009:816::2003

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 smtp.google.com.

TXT

1 record(s)
"v=spf1 -all"

NS

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

SOA

1 record(s)
ns1.google.com. dns-admin.google.com. 960819459 900 900 1800 60

CAA

1 record(s)
0 issue "pki.goog"

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 -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
Description
Final URL
http://www.google.cn/
HTTP status
206

HTTP

Status
HTTP/1.1 200 OK
Final URL
http://www.google.cn/
Version
2
Server
sffe
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Google Trust Services
CN
*.google.cn
Valid from
2026-07-20T13:08:46-05:00
Valid until
2026-10-12T13:08:45-05:00
Days remaining
64
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

2 active
—
HSTSNot detected
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
✓
Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
142.251.41.131
42,35 ms
Cloudflare
1.1.1.1
172.253.112.94
71,53 ms
Quad9
9.9.9.9
173.194.208.94
81,27 ms
OpenDNS
208.67.222.222
142.251.41.131
58,29 ms
AdGuard
94.140.14.14
142.251.41.131
45,47 ms

IP, geolocation and ASNAssociated network information

142.250.177.227

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

smtp.google.com

Port 25: Closed/unreachable - 44.7 ms - 220 mx.google.com ESMTP 586e51a60fabf-459f19f251fsi5165501fac.32 - gsmtp
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 4011.8 ms -

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