51f.com 焦点网

焦点，爱家爱生活！北京焦点网是最大的北京房地产网站，提供最全面最及时的北京房产楼市资讯，北京房产楼盘详情、买房流程、业主论坛等高质量内容

51f.com Quick Summary

Status

Offline

Server IP address resolved: No

Http response code: None

Last Checked: 04/26/2024

51f.com is hosted by CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN. See the list of other websites hosted by CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN.

51f.com is registered under .COM top-level domain. Check other websites in .COM zone.

During the last check (November 25, 2019) 51f.com has an expired SSL certificate issued by DigiCert Inc (expired on October 27, 2020), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by DigiCert Inc.

In accordance with Google Safe Browsing, Google Safe Search and Symantec 51f.com is pretty a safe domain.

Relying on Google Mobile-Friendly test 51f.com isn't optimized for mobile and tablet devices. Designing your websites to be mobile friendly ensures that your pages perform well on all devices, also website page loading time may be improved.

51f.com General Information

Information not available

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51f.com Safety Information

Rankchart Summary

Safe

Updated: 04/26/2024

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

Safe

Updated: 03/25/2024

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Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.

Google Safe Search

Safe

Updated: 03/29/2017

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SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.

Google Safe Browsing

Safe

Malware not found

Phishing not detected

Unwanted software not found

Harmfull applications not found

Updated: 01/09/2019

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

McAfee® WebAdvisor

Safe

Updated: 02/15/2021

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McAfee assesses 51f.com 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 51f.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Not Checked

Updated: 04/26/2024

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The WOT calculates reputation of the 51f.com. This reputation system receives ratings from users and information from third-party sources, assesses the 51f.com for safety features and confirms, whether 51f.com is suitable for children.

51f.com SSL Information

Information about SSL/TLS certificates

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Domain	focus.cn
Issuer Organization	DigiCert Inc
Issuer	GeoTrust CN RSA CA G1
Algorithm	RSA-SHA256
Valid form	08/29/2019
Expiration	10/27/2020
Signed	Certificate is not self signed
Additional Domains	focus.cn www.focus.cn .adm.focus.cn .esf.focus.cn .home.focus.cn .m.focus.cn .pftools.focus.cn .src.focus.cn m.zhibo.focus.cn .img.focus.cn .admin.focus.cn g.i.focus.cn ext.bbs.focus.cn .app.focus.cn m.jingjiren.focus.cn m.giftcard.focus.cn pinge.interface.focus.cn .focus.cn api.home.focus.cn m.bbs.focus.cn click.pv.focus.cn

SSL Checker

51f.com Server Information

51f.com Server Location

Where website hosting server is located?

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51f.com ASN Information

Information about IP address owner

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ASN ID: 45090

ASN Title: CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN

Updated: 03/04/2024

Raw ASN data:

% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS45056 - AS45115'

as-block: AS45056 - AS45115
descr: CNNIC ASN block
country: CN
remarks: These AS numbers are further assigned by CNNIC
remarks: to CNNIC members and end-users in China
admin-c: IPAS1-AP
tech-c: IPAS1-AP
mnt-by: APNIC-HM
mnt-lower: MAINT-CNNIC-AP
last-modified: 2009-09-29T06:15:17Z
source: APNIC

role: CNNIC IPAS CONFEDERATION
address: No.4, Zhongguancun No.4 South Street,
address: Haidian District, Beijing
country: CN
phone: +86-010-58813000
fax-no: +86-010-58813075
e-mail: ipas@cnnic.cn
admin-c: IP50-AP
tech-c: IP50-AP
nic-hdl: IPAS1-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2013-09-12T07:40:01Z
source: APNIC

% Information related to 'AS45056 - AS46079'

as-block: AS45056 - AS46079
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2009-09-29T05:48:11Z
source: APNIC

role: APNIC Hostmaster
address: 6 Cordelia Street
address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
fax-no: +61 7 3858 3199
e-mail: helpdesk@apnic.net
admin-c: AMS11-AP
tech-c: AH256-AP
nic-hdl: HM20-AP
remarks: Administrator for APNIC
notify: hostmaster@apnic.net
mnt-by: MAINT-APNIC-AP
last-modified: 2013-10-23T04:06:51Z
source: APNIC

% Information related to 'AS45090'

% Abuse contact for 'AS45090' is 'ipas@cnnic.cn'

aut-num: AS45090
as-name: CNNIC-TENCENT-NET-AP
descr: Shenzhen Tencent Computer Systems Company Limited
descr: Tencent Building, Kejizhongyi Avenue, Hi-techPark,Nanshan
descr: District,Shenzhen
country: CN
import: from AS18118
action pref=100;
accept ANY
import: from AS17962
action pref=100;
accept ANY
export: to AS18118
announce AS45090
export: to AS17962
announce AS45090
admin-c: DR196-AP
tech-c: JW2054-AP
mnt-routes: MAINT-CNNIC-AP
mnt-by: MAINT-CNNIC-AP
mnt-irt: IRT-CNNIC-CN
last-modified: 2016-10-17T00:30:37Z
source: APNIC

irt: IRT-CNNIC-CN
address: Beijing, China
e-mail: ipas@cnnic.cn
abuse-mailbox: ipas@cnnic.cn
admin-c: IP50-AP
tech-c: IP50-AP
auth: # Filtered
remarks: Please note that CNNIC is not an ISP and is not
remarks: empowered to investigate complaints of network abuse.
remarks: Please contact the tech-c or admin-c of the network.
mnt-by: MAINT-CNNIC-AP
last-modified: 2017-11-01T08:57:39Z
source: APNIC

person: Dreams Ruan
address: Tencent Building, Kejizhongyi Avenue, Hi-techPark,Nanshan District,Shenzhen
country: CN
phone: +86-755-86013388-84520
fax-no: +86-755-86013030
e-mail: dreamsruan@tencent.com
nic-hdl: DR196-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2010-05-10T10:02:01Z
source: APNIC

person: Jsquare Wu
address: Tencent Building, Kejizhongyi Avenue, Hi-techPark,Nanshan District,Shenzhen
country: CN
phone: +86-755-86013388-88441
fax-no: +86-755-86013030
e-mail: jsquare@tencent.com
nic-hdl: JW2054-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2010-05-10T10:02:01Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US4)

Geolocation

ASN Lookup

51f.com Domain Name Information

51f.com DNS Information

Domain name service records

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A
NS
SOA

Host	A Record	TTL
51f.com	115.159.241.109	600

Host	NS Record	TTL
51f.com	f1g1ns1.dnspod.net	86400
51f.com	f1g1ns2.dnspod.net	86400

51f.com Whois Information

Information about registered users or assignees of an Internet resource

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Raw WHOIS data:

Whois

DNS Lookup

51f.com HTML Validation

51f.com W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:

Duplicate ID “sug_group_id”.

Duplicate ID “getValue”.

End tag “li” seen, but there were open elements.

Unclosed element “div”.

Bad value “/music/mp3/夜的钢琴曲七十三 ~茉莉.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Bad value “/music/view/夜的钢琴曲七十三 ~茉莉.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Bad value “/music/mp3/夜的钢琴曲四十一 ~夜空.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Bad value “/music/view/夜的钢琴曲四十一 ~夜空.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Bad value “/music/mp3/山坡羊骊山怀古-古代歌曲.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Bad value “/music/view/山坡羊骊山怀古-古代歌曲.mp3” for attribute “href” on element “a”: Illegal character in path segment: space is not allowed.

Stray end tag “div”.

Warnings:

The first occurrence of ID “sug_group_id” was here.

The first occurrence of ID “getValue” was here.

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

This document appears to be written in Simplified Chinese. Consider adding “lang="zh-hans"” (or variant) to the “html” start tag.

HTML Validator

51f.com Desktop Performance

How Well 51f.com Performs On Desktops?

Website desktop performance and usability tips

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Speed
Resource Breakdown

Speed

73%

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

Leverage browser caching

Optimize images

Minify JavaScript

Minify HTML

Minify CSS

Updated: 10/05/2015

51f.com Mobile Performance

How Optimized Is 51f.com for Mobile Devices?

Tips on speeding up mobile site performance

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Usability
Speed
Resource Breakdown

Usability

57%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Size content to viewport

Updated: 10/05/2015

51f.com URL Typos

Most common user URL mistypes for 51f.com

www.51f.com
www.51f.net
www.51f.org
www.51f.info
www.51f.biz
www.51f.us
www.51f.mobi
www.1f.com
www.51f.com
www.5f.com
www.51.com
www.51c.com
www.51fc.com
www.51cf.com
www.51d.com
www.51fd.com
www.51df.com
www.51r.com
www.51fr.com
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www.51t.com
www.51ft.com
www.51tf.com
www.51g.com
www.51fg.com
www.51gf.com
www.51v.com
www.51fv.com
www.51vf.com
www.51f.con

Total Resources	138
Number of Hosts	25
Static Resources	124
JavaScript Resources	22
CSS Resources	7

CSS	76.1 KBytes
Images	526.6 KBytes
HTML	299.7 KBytes
JavaScript	419.5 KBytes
Other	4.2 KBytes

Total Resources	136
Number of Hosts	24
Static Resources	124
JavaScript Resources	21
CSS Resources	7

CSS	76.1 KBytes
Images	526.4 KBytes
HTML	299.7 KBytes
JavaScript	418.7 KBytes
Other	3.9 KBytes

51f.com 焦点网

焦点，爱家爱生活！北京 焦点网是最大的北京房地产网站，提供最全面最及时的北京房产楼市资讯，北京房产楼盘详情、买房流程、业主论坛等高质量内容

51f.com Quick Summary

51f.com General Information

51f.com Safety Information

51f.com SSL Information

51f.com Server Information

51f.com Server Location

51f.com ASN Information

51f.com Domain Name Information

51f.com DNS Information

51f.com Whois Information

51f.com HTML Validation

51f.com W3C HTML Markup Validation

51f.com Desktop Performance

How Well 51f.com Performs On Desktops?

51f.com Mobile Performance

How Optimized Is 51f.com for Mobile Devices?

51f.com URL Typos

Most common user URL mistypes for 51f.com

焦点，爱家爱生活！北京焦点网是最大的北京房地产网站，提供最全面最及时的北京房产楼市资讯，北京房产楼盘详情、买房流程、业主论坛等高质量内容