Analyze any domain

Get a complete DNS, email, SSL, HTTP and network analysis in seconds.

Total

DNS

Email

Security

Network

100

Availability

Domain36kr.com

IPv41

IPv60

MX records2

StatusActive

Domain technical report

36kr.com

Generated: 2026-08-09T03:12:55-05:00 · Cached result

JSON CSV PDF Visit site

IPv41

IPv60

MX2

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 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 policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 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

76 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 diversity20 / 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/1.1 200 OK

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

180.188.25.16

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

10 mxbiz2.qq.com.
5 mxbiz1.qq.com.

TXT

7 record(s)

"v=spf1 include:spf.mail.qq.com ~all"
"12vvwqqh119l36gbyc9432dc5n03khqy"
"7a96875c5202c10e80579518b511db2824d00fd848056d31fa4c3c96d19e4e61"
"v=spf1 a mx include:spf.mtasv.net include:spf.sendcloud.org include:spf.mail.qq.com include:mailgun.org ~all"
"google-site-verification=GUTwmyNJNLeQcGcOA4CjFjzclkLHmNHUwRLIDahxAVQ"
"google-site-verification=tm_8eXwyqrYtEECvynQNOhOQ3sAAgX2-N1hwwUQpQpQ"
"1583fbaf-8002-43fc-a3a7-762e9710d9bb-1423475114940"

NS

2 record(s)

vip4.alidns.com.
vip3.alidns.com.

SOA

1 record(s)

vip3.alidns.com. hostmaster.hichina.com. 2025121607 3600 1200 86400 600

CAA

0 record(s)

—

Not configured

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

5 record(s)

;; communications error to 69.64.44.20#53: timed out
;; communications error to 69.64.44.50#53: timed out
; <<>> DiG 9.18.39-0ubuntu0.22.04.4-Ubuntu <<>> 36kr.com RRSIG +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached

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 include:spf.mail.qq.com ~all

DMARC

Configured

v=DMARC1; p=none; rua=mailto:mail@36kr.com

DKIM

Selector k1

k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC4LypsfT5c4o2uQ8RdwbsebXEr0L6pkeNFF/q4ubSj5DOWv4JYUouPBfVsttOUAlXE3ByxUgm5UZVR/dbk/junX+gpla3iOBa/FniaSYj23ovvPjZEVx1q8isYCKSN7ZujXIYg6g1Q9lMiVld8GyyAXoslGJZEOj/c1OuvFuFPOwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Description

Final URL

https://36kr.com/

HTTP status

200

HTTP

Status

HTTP/1.1 200 OK

Final URL

https://36kr.com/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

sslTrus

*.36kr.com

Valid from

2026-04-08T19:00:00-05:00

Valid until

2026-10-24T18:59:59-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

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

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

180.188.25.16

88,61 ms

Cloudflare

1.1.1.1

180.188.25.16

199,79 ms

Quad9

9.9.9.9

180.188.25.16

70,95 ms

OpenDNS

208.67.222.222

180.188.25.16

104,57 ms

AdGuard

94.140.14.14

180.188.25.16

850,83 ms

IP, geolocation and ASNAssociated network information

180.188.25.16

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

mxbiz2.qq.com

Port 25: Closed/unreachable - 30 ms - 
Port 465: Closed/unreachable - 4219.6 ms - 
Port 587: Closed/unreachable - 4012 ms -

Recently analyzed domains

View all →

jackpotcityslots.org66 dovecot.org97 gsa.gov95 fl.us4 republic.ru4 active24.cz95 asso.fr4 baseballhall.org83 amazonaws.com78 siutica.cl4