Atmarkit.co.jp ITエキスパートのための問題解決メディア - ＠IT

プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。

Atmarkit.co.jp Overview

Atmarkit.co.jp is a professional IT media website primarily focused on problem-solving stories and technical contents. The website mainly targets expert IT professionals such as administrators, developers, and designers. Atmarkit.co.jp provides its users with high-quality articles and technical posts related to various IT products and technologies. It also has an online community where users can post their queries, share knowledge and collaborate with like-minded individuals.

The website is hosted by Amazon Web Services and uses SSL encryption by Amazon to protect user data. It has a .JP top-level domain, which indicates that it is a Japanese website. With 75890 unique users per day and 121424 pageviews, Atmarkit.co.jp has a significant user base and is valued at 1589940 US dollars.

Atmarkit.co.jp is a family-friendly site suitable for all age groups. It is free from adult content, hate speech, or any form of offensive language. The website is cleanly designed with a simple interface that allows ease of navigation. However, the PageSpeed Insights Score of Atmarkit.co.jp stands at 54, which could be improved.

The website's homepage focuses on technical stories, with easy-to-read snippets describing each article. The menu bar features various category options, enabling users to select the type of content they want to explore. The website also uses highlighting techniques to emphasize some section of the website for easy access.

The website provides several online services such as bulletin boards, events, or presentations. Users can join a community, ask for technical assistance in the Q&A corner, learn about new products, or connect with other IT experts through Atmarkit.co.jp. It also has a search bar and an archive menu to help users quickly find previous articles.

In conclusion, Atmarkit.co.jp is a valuable website for IT experts looking to stay current on the latest product and technology news. The website's design is straightforward and user-friendly, with a wealth of informative articles and technical posts. The online community and Q&A section make it a suitable platform for users to get help or collaborate with like-minded individuals. However, the PageSpeed Insights Score could be improved to enhance the user experience.

Atmarkit.co.jp Rank Summary

Global Rank

5,686

Average Load Time

1.98sec

Links In Count

6,785

Website Value

$1.6 M

Audience Geography. Where are atmarkit.co.jp visitors located?

Country	Visitors
Japan JP	98.6%
United States US	0.6%
Other	0.8%

Country	Pageviews
Japan JP	98.5%
United States US	0.8%
Other	0.7%

Country	Rank
Japan JP	390
United States US	96965

Where do visitors go on atmarkit.co.jp?

Subdomain	Pageviews
atmarkit.co.jp	86.97%
monoist.atmarkit.co.jp	9.56%
jibun.atmarkit.co.jp	1.8%
qa.atmarkit.co.jp	1.58%
other	0.08%

Subdomain	Pageviews per User
monoist.atmarkit.co.jp	2.3
jibun.atmarkit.co.jp	2
atmarkit.co.jp	1.5
qa.atmarkit.co.jp	1

Subdomain	Reach
atmarkit.co.jp	90.64%
monoist.atmarkit.co.jp	6.46%
qa.atmarkit.co.jp	2.33%
jibun.atmarkit.co.jp	1.85%

How popular is atmarkit.co.jp?

Period	Global Rank	Global Rank Delta
past 3 months	5686	-99
past month	6117	905
past week	6253	184
yesterday	11178	5575

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	9924	215	758	-4.902%	1.6	-4.19%
30	10920	2122	683	-20.67%	1.5	-9.942%
7	11017	328	68	-5.435%	1.6	-2.45%
1	18918	7999	41	-45.74%	2	10%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	4638	-233	176	-0.907%
30	4944	571	160	-11.93%
7	5147	118	160	-3.49%
1	9502	5072	86	-52.558%

Atmarkit.co.jp Website Safety

Overview

Last Updated: 11/22/2024

Overall result - atmarkit.co.jp 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: 03/21/2024

atmarkit.co.jp is safe.

Norton ConnectSafe evaluates atmarkit.co.jp for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 02/06/2019

atmarkit.co.jp 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

atmarkit.co.jp 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: 02/22/2021

atmarkit.co.jp is safe.

McAfee assesses atmarkit.co.jp 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 atmarkit.co.jp for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/09/2019

atmarkit.co.jp child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	atmarkit.co.jp
Issuer Organization	Amazon
Issuer	Amazon RSA 2048 M02
Algorithm	RSA-SHA256
Valid form	01/26/2024
Expiration	02/23/2025
Signed	Certificate is not self signed
Additional Domains	atmarkit.co.jp *.atmarkit.co.jp

Atmarkit.co.jp Rank History

Alexa Rank shows how popular atmarkit.co.jp is in comparison with other sites. The most popular site has Alexa Rank equals 1. If atmarkit.co.jp has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to atmarkit.co.jp and pageviews on atmarkit.co.jp over the past 3 months.

Atmarkit.co.jp Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 16509

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

Last Update: 07/15/2024

#
# 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.
#

Atmarkit.co.jp Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]
Domain Information: [ドメイン情報]
a. [ドメイン名] ATMARKIT.CO.JP
e. [そしきめい] ゆうげんがいしゃねっとびじょん
f. [組織名] 有限会社ネットビジョン
g. [Organization] Netvision Co., Ltd.
k. [組織種別] 有限会社
l. [Organization Type] limited private company
m. [登録担当者] TO12884JP
n. [技術連絡担当者] YN42983JP
p. [ネームサーバ] ns-270.awsdns-33.com
p. [ネームサーバ] ns-1657.awsdns-15.co.uk
p. [ネームサーバ] ns-1481.awsdns-57.org
p. [ネームサーバ] ns-708.awsdns-24.net
s. [署名鍵]
[状態] Connected (2025/07/31)
[登録年月日] 2005/07/21
[接続年月日] 2005/07/21
[最終更新] 2024/08/01 01:01:51 (JST)

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Atmarkit.co.jp HTML Check

HTML Validation Tool

Errors

Malformed byte sequence: “94”.

Malformed byte sequence: “8c”.

Malformed byte sequence: “8e”.

Malformed byte sequence: “93”.

Malformed byte sequence: “fa”.

Malformed byte sequence: “9e”.

Malformed byte sequence: “95”.

Malformed byte sequence: “aa”.

Malformed byte sequence: “81”.

Malformed byte sequence: “97”.

Malformed byte sequence: “89”.

Malformed byte sequence: “f0”, “90”.

Malformed byte sequence: “e0”.

Malformed byte sequence: “98”.

Malformed byte sequence: “8d”.

Malformed byte sequence: “da”.

Malformed byte sequence: “83”.

Malformed byte sequence: “85”.

Malformed byte sequence: “80”.

Malformed byte sequence: “8f”.

Malformed byte sequence: “ee”, “95”.

Malformed byte sequence: “f1”, “83”.

Malformed byte sequence: “8a”.

Malformed byte sequence: “ad”.

Malformed byte sequence: “9d”.

Malformed byte sequence: “87”.

Malformed byte sequence: “8b”.

Malformed byte sequence: “82”.

Malformed byte sequence: “c8”.

Malformed byte sequence: “bd”.

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

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

Bad value “content-style-type” for attribute “http-equiv” on element “meta”.

Bad value “content-script-type” for attribute “http-equiv” on element “meta”.

Malformed byte sequence: “96”.

Malformed byte sequence: “e2”, “91”.

Malformed byte sequence: “e8”, “89”.

Malformed byte sequence: “f0”.

Malformed byte sequence: “88”.

Malformed byte sequence: “90”.

Malformed byte sequence: “bb”.

Malformed byte sequence: “e2”, “8b”.

Malformed byte sequence: “b7”.

Malformed byte sequence: “e2”, “81”.

Malformed byte sequence: “a6”.

Malformed byte sequence: “bf”.

Malformed byte sequence: “e2”, “83”.

Forbidden code point U+0081.

Malformed byte sequence: “e3”, “82”.

Malformed byte sequence: “c9”.

Malformed byte sequence: “b5”.

Malformed byte sequence: “c4”.

Malformed byte sequence: “b6”.

Malformed byte sequence: “b9”.

Bad element name “gcse:searchbox-only”: Code point “U+003A” is not allowed

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

Malformed byte sequence: “a9”.

Malformed byte sequence: “a4”.

Malformed byte sequence: “86”.

Malformed byte sequence: “c1”.

Malformed byte sequence: “e9”, “89”.

Malformed byte sequence: “e6”, “81”.

Malformed byte sequence: “bc”.

Malformed byte sequence: “a8”.

Malformed byte sequence: “d1”.

Malformed byte sequence: “a1”.

Malformed byte sequence: “b3”.

Malformed byte sequence: “e7”, “81”.

Malformed byte sequence: “b1”.

Malformed byte sequence: “b4”.

Malformed byte sequence: “92”.

Malformed byte sequence: “e9”.

Malformed byte sequence: “fb”.

Malformed byte sequence: “f4”, “81”.

Malformed byte sequence: “b2”.

Malformed byte sequence: “ef”, “91”.

Malformed byte sequence: “c0”.

Malformed byte sequence: “91”.

Malformed byte sequence: “a2”.

Malformed byte sequence: “ab”.

Malformed byte sequence: “f1”, “82”.

Malformed byte sequence: “a7”.

Malformed byte sequence: “f9”.

Malformed byte sequence: “e9”, “95”.

Malformed byte sequence: “f0”, “95”.

Malformed byte sequence: “9f”.

Malformed byte sequence: “f5”.

Malformed byte sequence: “f6”.

Malformed byte sequence: “cc”.

Malformed byte sequence: “e6”, “82”.

Malformed byte sequence: “fc”.

Malformed byte sequence: “af”.

Malformed byte sequence: “e9”, “8b”.

Malformed byte sequence: “ea”, “82”.

Malformed byte sequence: “e8”, “91”.

Malformed byte sequence: “b8”.

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

Forbidden code point U+0082.

Malformed byte sequence: “c6”.

Warnings

Element name “gcse:searchbox-only” cannot be represented as XML 1.0.

Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)

Text run is not in Unicode Normalization Form C.

The value of attribute “title” on element “a” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.

NON-DOCUMENT-ERROR

Too many messages.

Atmarkit.co.jp Desktop Performance

Last tested: 06/13/2016

Desktop Speed

65%

Leverage browser caching

Optimize images

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

Enable compression

Minify JavaScript

Minify CSS

Desktop Resource Breakdown

Total Resources	199
Number of Hosts	34
Static Resources	149
JavaScript Resources	59
CSS Resources	13

Atmarkit.co.jp Mobile Insights

Last tested: 12/02/2019

Mobile Usability

100%

Mobile Speed

54%

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

Avoid landing page redirects

Leverage browser caching

Optimize images

Minify JavaScript

Minify HTML

Enable compression

Mobile Resource Breakdown

Total Resources	127
Number of Hosts	50
Static Resources	41
JavaScript Resources	60
CSS Resources	2

Atmarkit.co.jp Common Typos

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www.atmarkit.net
www.atmarkit.org
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Atmarkit.co.jp ITエキスパートのための問題解決メディア - ＠IT

プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。

Atmarkit.co.jp Overview

Atmarkit.co.jp Rank Summary

Atmarkit.co.jp Website Safety

Atmarkit.co.jp Rank History

Atmarkit.co.jp Hosting Information

Atmarkit.co.jp Domain Registration and Settings

Atmarkit.co.jp HTML Check

Atmarkit.co.jp Desktop Performance

Atmarkit.co.jp Mobile Insights

Atmarkit.co.jp Similar Audits

Atmarkit.co.jp Common Typos