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67
Total
90
DNS
45
Email
65
Security
70
Network
60
Availability
Domain12306.cn
IPv42
IPv62
MX records1
StatusActive
Domain technical report

12306.cn

12306.cn

Generated: 2026-08-09T10:50:11-05:00 · Cached result

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IPv42
IPv62
MX1
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 propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

!
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

99 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 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 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

!
HTTP response0 / 40 pts · Availability

No successful HTTP response.

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

3 record(s)
12306.cn.wsglb0.com.
117.24.11.65
171.109.103.144

AAAA

3 record(s)
12306.cn.wsglb0.com.
240e:964:ea00:80::2b
240e:951:2c10:5404::8d

CNAME

1 record(s)
12306.cn.wsglb0.com.

MX

1 record(s)
10 mail.12306.cn.

TXT

1 record(s)
"v=spf1 ip4:124.127.44.251 ip4:114.251.18.38 ip4:61.232.5.39 ip4:124.127.44.247 ip4:114.251.18.30 ip4:61.232.5.30 ip4:123.151.17.4 ip4:111.33.90.4 ip4:117.10.116.4 -all"

NS

4 record(s)
cns1.zdnscloud.net.
vns1.zdnscloud.biz.
ins1.zdnscloud.com.
dns1.zdnscloud.info.

SOA

1 record(s)
cns1.zdnscloud.net. mail.knet.cn. 188 3600 3600 3600 900

CAA

1 record(s)
12306.cn.wsglb0.com.

DS

1 record(s)
12306.cn.wsglb0.com.

DNSKEY

1 record(s)
12306.cn.wsglb0.com.

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

2 record(s)
;; communications error to 69.64.44.20#53: timed out
12306.cn.wsglb0.com.

SRV

1 record(s)
12306.cn.wsglb0.com.

NAPTR

1 record(s)
12306.cn.wsglb0.com.

TLSA

1 record(s)
12306.cn.wsglb0.com.

SSHFP

1 record(s)
12306.cn.wsglb0.com.

SPF

Configured
v=spf1 ip4:124.127.44.251 ip4:114.251.18.38 ip4:61.232.5.39 ip4:124.127.44.247 ip4:114.251.18.30 ip4:61.232.5.30 ip4:123.151.17.4 ip4:111.33.90.4 ip4:117.10.116.4 -all

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

No data
Title
Description
Final URL
https://12306.cn/
HTTP status

HTTP

Status
Final URL
https://12306.cn/
Version
0
Server
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert, Inc.
CN
default.chinanetcenter.com
Valid from
2025-11-02T18:00:00-06:00
Valid until
2026-11-16T17:59:59-06:00
Days remaining
99
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

0 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
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

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
117.24.11.65, 171.109.103.144
1.261,88 ms
Cloudflare
1.1.1.1
117.24.11.65, 171.109.103.144
121,00 ms
Quad9
9.9.9.9
117.24.11.65, 222.246.148.206
311,70 ms
OpenDNS
208.67.222.222
117.24.11.65, 171.109.103.144
277,12 ms
AdGuard
94.140.14.14
171.109.103.137, 180.163.117.104
811,09 ms

IP, geolocation and ASNAssociated network information

117.24.11.65

No data
success
No
country
region
city
asn
organization
isp

171.109.103.144

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

mail.12306.cn

Port 25: Closed/unreachable - 24 ms - 
Port 465: Closed/unreachable - 4024.5 ms - 
Port 587: Closed/unreachable - 4020.9 ms -

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