yb21.cn ▶ 全国邮政编码查询系统

Yb21.cn | Key Trends

Online Status

Offline

Server IP address resolved: No
Http response code: None
Last Checked: 01/24/2025

Yb21.cn attracts 809 unique visitors daily, generating 2,427 pageviews. The estimated value of yb21.cn is 42,179 USD. Each visitor views approximately 3.21 pages on average.

According to Majestic's traffic estimates, yb21.cn ranks 7,159 globally, with the majority of its visitors coming from China, where it holds the 24,624 position.

Yb21.cn is hosted by AMAZON-02 - Amazon.com, Inc., US in Hong Kong; however, migrating the server to China could further improve page load times for the majority of users.

See the list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.

Yb21.cn is registered with the .CN top-level domain. Explore additional websites within the .CN zone.

A recent examination on (September 25, 2022), indicates that yb21.cn has an expired SSL certificate issued by Let's Encrypt (expired on September 08, 2021). Click the "Refresh" button in the Safety Information section for updated SSL details. See the list of websites using SSL certificates issued by Let's Encrypt.

According to Google Safe Browsing, Google Safe Search and Symantec yb21.cn appears to be a safe domain.

Based on Google's Mobile-Friendly test, yb21.cn is optimized for mobile and tablet devices.

Yb21.cn | General Site Information

Global Rank

294,095

Average Load Time

0.34sec

Links In Count

207

Website Value

$39,420

Audience Geography. Where are yb21.cn visitors located?

Country	Visitors
China CN	95%
Hong Kong HK	4.3%
Other	0.8%

Country	Pageviews
China CN	96.4%
Hong Kong HK	3.3%
Other	0.3%

Country	Rank
China CN	24624
Hong Kong HK	32018

Where do visitors go on yb21.cn?

Subdomain	Pageviews
yb21.cn	100%

Subdomain	Pageviews per User
yb21.cn	5

Subdomain	Reach
yb21.cn	100%

How popular is yb21.cn?

Period	Global Rank	Global Rank Delta
past 3 months	294095	3156
past month	211738	-125333
past week	201874	-125350

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	298815	1633	13	0.5%	3	1%
30	172172	-380997	28	400%	5	300%
7	162548	-111384	31	100%	5	10%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	312637	3731	17	-0.74%
30	247435	-29680	2	20%
7	240593	-143808	2	80%

Yb21.cn | Safety and Security Details

Overview

Last Updated: 01/24/2025

Overall result - yb21.cn is safe.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/22/2023

yb21.cn is safe.

Norton ConnectSafe evaluates yb21.cn for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 10/29/2016

yb21.cn is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

yb21.cn is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 02/24/2021

yb21.cn is safe.

McAfee assesses yb21.cn for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze yb21.cn for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/24/2025

yb21.cn child safety is unknown.

The WOT calculates reputation of the yb21.cn. This reputation system receives ratings from users and information from third-party sources, assesses the yb21.cn for safety features and confirms, whether yb21.cn is suitable for children.

Yb21.cn | SSL Certificate Information

SSL Checker Tool

Domain	www.chinaar.com
Issuer Organization	Let's Encrypt
Issuer	R3
Algorithm	RSA-SHA256
Valid form	06/10/2021
Expiration	09/08/2021
Signed	Certificate is not self signed
Additional Domains	chinaar.com www.chinaar.com

Yb21.cn | Server and Hosting Details

Server Location

Geolocation Tool

Yb21.cn ASN Information

ASN Lookup Tool

ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., US

Last Update: 10/06/2023

ASN Whois

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 16509
ASName: AMAZON-02
ASHandle: AS16509
RegDate: 2000-05-03
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509

OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4

OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN

OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN

RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Yb21.cn | Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: yb21.cn
ROID: 20070712s10001s17858434-cn
Domain Status: clientTransferProhibited
Registrant: 潘铭泽
Registrant Contact Email: congdinmei@gmail.com
Sponsoring Registrar: Web Commerce Communications Limited
Name Server: b.share-dns.net
Name Server: a.share-dns.com
Registration Time: 2007-07-12 12:36:45
Expiration Time: 2025-07-12 12:36:45
DNSSEC: unsigned

DNS Records

DNS Lookup Tool

Host	A Record	TTL
yb21.cn	128.1.138.49	600

Host	MX Record	Priority	TTL

Host	NS Record	TTL
yb21.cn	f1g1ns2.dnspod.net	86400
yb21.cn	f1g1ns1.dnspod.net	86400

Host	TXT Record	TTL

f1g1ns1.dnspod.net
TTL: 600
Email address: freednsadmin.dnspod.com
Serial: 1565658811
Refresh: 3600
Retry: 180
Expire: 1209600
Minimum: 180

Yb21.cn | HTML Validation Report

HTML Validation Tool

Errors

Malformed byte sequence: “b9”.

Malformed byte sequence: “fa”.

Malformed byte sequence: “d3”.

Malformed byte sequence: “ca”.

Malformed byte sequence: “d5”.

Malformed byte sequence: “fe”.

Malformed byte sequence: “b1”.

Malformed byte sequence: “e0”.

Malformed byte sequence: “c2”.

Malformed byte sequence: “eb”, “b2”.

Malformed byte sequence: “e9”.

Malformed byte sequence: “e0”, “b2”.

Malformed byte sequence: “cc”.

Malformed byte sequence: “b8”.

Malformed byte sequence: “f7”.

Malformed byte sequence: “b4”.

Malformed byte sequence: “f3”, “b3”.

Malformed byte sequence: “c7”.

Malformed byte sequence: “d0”.

Malformed byte sequence: “cf”.

Malformed byte sequence: “e7”.

Malformed byte sequence: “f2”, “b5”.

Malformed byte sequence: “c4”.

Malformed byte sequence: “be”.

Malformed byte sequence: “ab”.

Malformed byte sequence: “b5”.

Malformed byte sequence: “bd”.

Malformed byte sequence: “f2”.

Malformed byte sequence: “b0”.

Malformed byte sequence: “cd”.

Malformed byte sequence: “f2”, “b8”.

Malformed byte sequence: “f6”.

Malformed byte sequence: “eb”.

Malformed byte sequence: “fd”.

Malformed byte sequence: “dd”.

Malformed byte sequence: “c3”.

Malformed byte sequence: “d7”.

Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.

Internal encoding declaration “gb2312” disagrees with the actual encoding of the document (“utf-8”).

Bad value “text/html; charset=gb2312” for attribute “content” on element “meta”: “gb2312” is not a preferred encoding name. The preferred label for this encoding is “gbk”.

Attribute “ȫ��ʱ��ѯ,�ṩȫ��,” not allowed on element “meta” at this point.

Attribute “��ѯ,��ȷ��,” not allowed on element “meta” at this point.

Attribute “ȫ��һ�ٶ��,” not allowed on element “meta” at this point.

Attribute “��ȫ�沢�Ҿ�ȷ” not allowed on element “meta” at this point.

Attribute “leftmargin” not allowed on element “body” at this point.

Attribute “topmargin” not allowed on element “body” at this point.

The “vlink” attribute on the “body” element is obsolete. Use CSS instead.

The “alink” attribute on the “body” element is obsolete. Use CSS instead.

The “marginwidth” attribute on the “body” element is obsolete. Use CSS instead.

The “marginheight” attribute on the “body” element is obsolete. Use CSS instead.

Attribute “background” not allowed on element “table” at this point.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “align” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “width” attribute on the “td” element is obsolete. Use CSS instead.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

The “align” attribute on the “td” element is obsolete. Use CSS instead.

Malformed byte sequence: “bf”.

Malformed byte sequence: “aa”.

Malformed byte sequence: “a9”.

Malformed byte sequence: “f8”.

Malformed byte sequence: “d8”.

Malformed byte sequence: “ec”, “bd”.

Malformed byte sequence: “ba”.

Malformed byte sequence: “bc”.

Malformed byte sequence: “d2”.

Malformed byte sequence: “c6”.

Malformed byte sequence: “a6”.

Malformed byte sequence: “a3”.

Malformed byte sequence: “b6”.

Malformed byte sequence: “a8”.

Malformed byte sequence: “da”.

Malformed byte sequence: “b3”.

Malformed byte sequence: “b2”.

Malformed byte sequence: “d6”.

Malformed byte sequence: “c0”.

Malformed byte sequence: “bb”.

Malformed byte sequence: “e2”.

Malformed byte sequence: “ce”.

Malformed byte sequence: “f3”.

Malformed byte sequence: “d1”.

Malformed byte sequence: “f4”.

Malformed byte sequence: “a4”.

The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.

The “height” attribute on the “td” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “table” element is obsolete. Use CSS instead.

“td” start tag in table body.

Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Malformed byte sequence: “d4”.

Malformed byte sequence: “c1”.

Malformed byte sequence: “c5”.

Malformed byte sequence: “fc”.

Malformed byte sequence: “e0”, “b7”.

Malformed byte sequence: “e5”.

Malformed byte sequence: “c9”.

Malformed byte sequence: “f5”.

Malformed byte sequence: “fb”.

Malformed byte sequence: “cb”.

Malformed byte sequence: “f9”.

Malformed byte sequence: “a2”.

Malformed byte sequence: “ad”.

Malformed byte sequence: “ac”.

Malformed byte sequence: “a7”.

Malformed byte sequence: “b7”.

Malformed byte sequence: “af”.

Warnings

Attribute “ȫ��ʱ��ѯ,�ṩȫ��,” is not serializable as XML 1.0.

Attribute “��ѯ,��ȷ��,” is not serializable as XML 1.0.

Attribute “ȫ��һ�ٶ��,” is not serializable as XML 1.0.

Attribute “��ȫ�沢�Ҿ�ȷ” is not serializable as XML 1.0.

A table row was 2 columns wide and exceeded the column count established by the first row (1).

Text run starts with a composing character.

NON-DOCUMENT-ERROR

Too many messages.

Yb21.cn | Desktop Performance Insights

Last tested: 05/22/2017

Desktop

Desktop Speed

92%

Leverage browser caching

Enable compression

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Desktop Resource Breakdown

Total Resources	7
Number of Hosts	1
Static Resources	6
CSS Resources	1

Yb21.cn | Mobile Performance Insights

Last tested: 05/22/2017

Mobile

Mobile Usability

61%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Mobile Speed

86%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Enable compression

Mobile Resource Breakdown

Total Resources	7
Number of Hosts	1
Static Resources	6
CSS Resources	1

Yb21.cn | Common Typographical Errors

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www.yh21.cn
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www.yb1.cn
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Yb21.cn | Key Trends

Yb21.cn | General Site Information

Yb21.cn | Safety and Security Details

Yb21.cn | Server and Hosting Details

Yb21.cn | Domain Name Information

Yb21.cn | HTML Validation Report

Yb21.cn | Desktop Performance Insights

Yb21.cn | Mobile Performance Insights

Yb21.cn | Competitors Analysis

Yb21.cn | Common Typographical Errors