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Total

DNS

Email

Security

Network

Availability

Domain91tcw.cc

IPv49

IPv60

MX records2

StatusActive

Domain technical report

优你-乐享城市-校园综合信息生活服务平台|校园外卖平台|校园跑腿配送|高校生活圈|校园APP|校园外卖系统|校园跑腿系统，打造专属品牌校园生活服务平台

91tcw.cc

优你校园乐享城市生活服务APP系统为高校运营者提供校园生活服务平台+配送服务一整套解决方案，帮助运营者在校园外卖、校园跑腿配送、校园信息发布等校园生活领域助力，打造一个智能化本地高校生活圈。

Generated: 2026-08-09T23:34:04-05:00 · Cached result

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IPv49

IPv60

MX2

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

9 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 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 records20 / 20 pts · Mail

2 MX record(s).

SPF0 / 25 pts · Mail

SPF policy not found.

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

38 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 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 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 URL0 / 20 pts · Availability

Final URL is not HTTPS.

DNS and emailPublished records and email configuration

A

11 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.
106.225.240.24
120.52.95.237
116.153.39.128
218.60.101.80
223.247.106.57
221.229.162.62
120.39.165.50
218.11.1.241
218.12.77.90

AAAA

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

CNAME

1 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.

MX

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

TXT

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

NS

2 record(s)

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

SOA

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

CAA

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

DS

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

DNSKEY

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

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 <<>> 91tcw.cc RRSIG +short +time=1 +tries=1
;; global options: +cmd
;; no servers could be reached

NSEC

0 record(s)

—

Not configured

NSEC3

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

SRV

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

NAPTR

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

TLSA

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

SSHFP

2 record(s)

91tcw.cc.08458fc6.cdnhwcggk22.com.
hcdnw101.sme.cdnhwcaip122.cn.

SPF

Not configured

—

Not configured

DMARC

Not configured

—

Not configured

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Description

Final URL

http://www.91tcw.cc/

HTTP status

200

HTTP

Status

HTTP/1.1 200 OK

Final URL

http://www.91tcw.cc/

Version

Server

nginx/1.30.3

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

*.21chance.com

Valid from

2026-06-19T21:30:10-05:00

Valid until

2026-09-17T21:30:09-05:00

Days remaining

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-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

106.225.240.24, 116.153.39.128, 120.39.165.50, 120.52.95.237, 218.11.1.241, 218.12.77.90, 218.60.101.80, 221.229.162.62, 223.247.106.57

320,07 ms

Cloudflare

1.1.1.1

106.225.240.24, 116.153.39.128, 120.39.165.50, 120.52.95.237, 218.11.1.241, 218.12.77.90, 218.60.101.80, 221.229.162.62, 223.247.106.57

1.504,95 ms

Quad9

9.9.9.9

106.225.240.24, 116.153.39.128, 120.39.165.50, 120.52.95.237, 218.11.1.241, 218.12.77.90, 218.60.101.80, 221.229.162.62, 223.247.106.57

774,66 ms

OpenDNS

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

91tcw.cc.08458fc6.cdnhwcggk22.com

Port 25: Closed/unreachable - 219.5 ms - 
Port 465: Closed/unreachable - 4019.3 ms - 
Port 587: Closed/unreachable - 4019.6 ms -

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