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Total

DNS

Email

Security

Network

Availability

Domain51job.com

IPv40

IPv60

MX records2

StatusActive

Domain technical report

招聘网_人才网_找工作_求职_上前程无忧

51job.com

前程无忧人才网面向全国,提供2026准确的招聘网站信息,为企业和求职者提供人才招聘、求职、找工作、培训等在内的全方位的人力资源服务,更多求职找工作信息尽在前程无忧!

Generated: 2026-08-09T00:45:41-05:00 · Cached result

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IPv40

IPv60

MX2

NS2

DiagnosticsMain findings and recommendations

IPv4 (A)0 / 30 pts · Dns

0 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 policy5 / 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.

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

200 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

IPv4 diversity0 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

DNS resolution0 / 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

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 <<>> 51job.com A +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached

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

3 record(s)

"v=spf1 ip4:61.129.48.128/25 ip4:218.98.36.40/29 ip4:222.73.233.0/25 ip4:58.215.111.0/24 ip4:58.215.120.0/26 include:spf.mail.qq.com -all"
"globalsign-domain-verification=oQILnMe2IToIO9bU8iHqhs1_uWKxl4g4Spos6nJ2S6"
"17j87jzqhc1vtjr8d1mlq3kdm91kxlwv"

NS

2 record(s)

dns.51job.com.
ns3.51job.com.

SOA

2 record(s)

;; communications error to 69.64.44.20#53: timed out
dns.51job.com. webmaster.51job.com. 2026080602 600 600 604800 1800

CAA

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 <<>> 51job.com CAA +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached

DS

0 record(s)

—

Not configured

DNSKEY

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 <<>> 51job.com DNSKEY +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached

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 ip4:61.129.48.128/25 ip4:218.98.36.40/29 ip4:222.73.233.0/25 ip4:58.215.111.0/24 ip4:58.215.120.0/26 include:spf.mail.qq.com -all

DMARC

Not configured

—

Not configured

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

招聘网_人才网_找工作_求职_上前程无忧

Description

Final URL

https://51job.com/

HTTP status

200

HTTP

Status

HTTP/1.1 200 OK

Final URL

https://51job.com/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert, Inc.

*.51job.com

Valid from

2026-01-26T18:00:00-06:00

Valid until

2027-02-25T17:59:59-06:00

Days remaining

200

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES256-SHA384

Security headers

1 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-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

114.80.176.40

61,62 ms

Cloudflare

1.1.1.1

114.80.176.40

995,00 ms

Quad9

9.9.9.9

114.80.176.40

230,52 ms

OpenDNS

208.67.222.222

114.80.176.40

450,31 ms

AdGuard

94.140.14.14

114.80.176.40

459,84 ms

IP, geolocation and ASNAssociated network information

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 - 2.7 ms - 
Port 465: Closed/unreachable - 4021.2 ms - 
Port 587: Closed/unreachable - 4021.7 ms -

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