chungdahm.com - 청담어학원 | April어학원 | CMS 영재교육센터 | CMS 영재관

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 2.65 sec.
Last Checked: 02/26/2023

Over the time chungdahm.com has been ranked as high as 7,585 in the world, while most of its traffic comes from Korea, where it reached as high as 1,383 position.

Chungdahm.com receives about 2,036 unique visitors and 8,144 pageviews per day. The estimated value of chungdahm.com is 140,160 USD. Each unique visitor makes about 4 pageviews on average.

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

At the time of the last check (June 30, 2019) chungdahm.com has an expired wildcard SSL certificate (expired on July 18, 2020).

According to Google Safe Browsing, Google Safe Search and Symantec chungdahm.com is quite a safe domain.

Mobile-Friendly test indicates that chungdahm.com is well optimized for mobile and tablet devices, however website page loading time could be improved.

Chungdahm.com General Information

Global Rank

81,065

Average Load Time

0.58sec

Links In Count

Website Value

$140,160

Audience Geography. Where are chungdahm.com visitors located?

Country	Rank
Korea KR	1383

Country	Percent of Pageviews
Korea KR	98.5%
Other	1.5%

Country	Percent of Visitors
Korea KR	99.1%
Other	0.8%

Where do visitors go on chungdahm.com?

Subdomain	Pageviews
account.chungdahm.com	24.17%
il.chungdahm.com	20.39%
learning.chungdahm.com	19.34%
chungdahm.com	17.35%
teachers.chungdahm.com	9.23%
cdi.chungdahm.com	3.14%
merp.chungdahm.com	2.41%
april.chungdahm.com	1.18%
other	2.79%

Subdomain	Pageviews per User
cdi.chungdahm.com	4
merp.chungdahm.com	3
teachers.chungdahm.com	1.4
chungdahm.com	1.3
il.chungdahm.com	1.2
learning.chungdahm.com	1.1
account.chungdahm.com	1.1
april.chungdahm.com	1

Subdomain	Reach
account.chungdahm.com	77.54%
learning.chungdahm.com	61.95%
il.chungdahm.com	59.72%
chungdahm.com	46.85%
teachers.chungdahm.com	24.1%
merp.chungdahm.com	3.09%
april.chungdahm.com	3.05%
cdi.chungdahm.com	2.9%

How popular is chungdahm.com?

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	90851	-77542	78	120%
30	72701	-20386	10	30%
7	68573	3104	11	-5.427%
1	77307	-1233	10	-0.29%

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	71259	-80385	85	170%	4	20%
30	62990	-6552	99	10%	3.6	-14.89%
7	59210	2252	11	-4.32%	3.6	1%
1	76769	-30582	87	50%	3	50%

Period	Global Rank	Global Rank Delta
past 3 months	81065	-74828
past month	66275	-15473
past week	62026	2627
yesterday	72741	-9814

Chungdahm.com Safety Information

Overview

Last Updated: 04/26/2024

Overall result - "chungdahm.com" 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: 03/24/2024

chungdahm.com is safe.

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

Google Safe Search

Last Updated: 11/02/2016

chungdahm.com 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

Malware not found at "chungdahm.com".
"chungdahm.com" is not a phishing page.
"chungdahm.com" does not install unwanted software.
"chungdahm.com" does not contain harmfull applications.
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

chungdahm.com is safe.

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

Web of Trust

Last Updated: 04/26/2024

chungdahm.com child safety isunknown.

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

SSL Information

SSL Checker Tool

Domain	*.chungdahm.com
Issuer	GlobalSign Domain Validation CA - SHA256 - G2
Algorithm	RSA-SHA256
Valid form	05/16/2018
Expiration	07/18/2020
Signed	Certificate is not self signed
Additional Domains	*.chungdahm.com chungdahm.com

Chungdahm.com Server Information

Server Location

Geolocation Tool

Seoul-teukbyeolsi

Republic of

Korea

ASN Information

ASN Lookup Tool

ASN ID: 4766
ASN Title: KIXS-AS-KR Korea Telecom, KR

Last Update: 02/24/2024

ASN Whois

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

% Information related to 'AS4608 - AS4864'

as-block: AS4608 - AS4864
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: 2008-09-04T06:40:26Z
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 'AS4766'

% Abuse contact for 'AS4766' is 'hostmaster@nic.or.kr'

aut-num: AS4766
as-name: KIXS-AS-KR
descr: Korea Telecom
country: KR
admin-c: AM1758-AP
tech-c: AM1758-AP
import: from AS9277
action pref=100;
accept ANY
import: from AS9318
action pref=10;
accept ANY
export: to AS9277
announce AS4766
export: to AS9318
announce AS4766
default: to AS9277
action pref=10;
networks ANY
mnt-by: MNT-KRNIC-AP
mnt-irt: IRT-KRNIC-KR
last-modified: 2016-11-23T01:18:18Z
source: APNIC

irt: IRT-KRNIC-KR
address: Seocho-ro 398, Seocho-gu, Seoul, Korea
e-mail: hostmaster@nic.or.kr
abuse-mailbox: hostmaster@nic.or.kr
admin-c: IM574-AP
tech-c: IM574-AP
auth: # Filtered
mnt-by: MNT-KRNIC-AP
last-modified: 2017-10-19T07:36:36Z
source: APNIC

person: AS Manager
address: Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
country: KR
phone: +82-2-500-6630
e-mail: kornet_ip@kt.com
nic-hdl: AM1758-AP
mnt-by: MNT-KRNIC-AP
last-modified: 2016-11-23T01:17:45Z
source: APNIC

% Information related to 'AS4766'

aut-num: AS4766
as-name: KIXS-AS-KR-KR
descr: Korea Telecom
country: KR
import: from AS9318 action pref=10 accept ANY
import: from AS9277 action pref=100 accept ANY
export: to AS9318 announce AS4766
export: to AS9277 announce AS4766
admin-c: KB27-KR
tech-c: 27-KR
mnt-by: MNT-KRNIC-AP
mnt-irt: IRT-KRNIC-KR
changed: hostmaster@nic.or.kr
source: KRNIC

person: AS Manager
address: Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:
country: KR
phone: +82-2-500-6630
e-mail: kornet_ip@kt.com
nic-hdl: 27-KR
mnt-by: MNT-KRNIC-AP
changed: hostmaster@nic.or.kr
source: KRNIC

person: AS Manager
address: Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:
country: KR
phone: +82-2-500-6630
e-mail: kornet_ip@kt.com
nic-hdl: KB27-KR
mnt-by: MNT-KRNIC-AP
changed: hostmaster@nic.or.kr
source: KRNIC

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

Chungdahm.com Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: CHUNGDAHM.COM
Registry Domain ID: 88757107_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.gabia.com
Registrar URL: http://www.gabia.com
Updated Date: 2021-06-19T20:02:39Z
Creation Date: 2002-07-26T05:49:36Z
Registry Expiry Date: 2022-07-26T05:49:36Z
Registrar: Gabia, Inc.
Registrar IANA ID: 244
Registrar Abuse Contact Email: abuse@gabia.com
Registrar Abuse Contact Phone: +82.2.829.3543
Domain Status: ok https://icann.org/epp#ok
Name Server: NS1.CDI.CO.KR
Name Server: NS2.CDI.CO.KR
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2022-02-11T07:32:52Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
chungdahm.com	119.207.73.110	3584

Host	MX Record	Priority	TTL
chungdahm.com	mail.chungdahm.com	10	3600

Host	NS Record	TTL
chungdahm.com	www.chungdahm.com
chungdahm.com	chungdahm.com

Host	TXT Record	TTL
chungdahm.com	v=spf1 ip4:119.207.73.39 ip4:119.207.73.50 ip4:119.207.73.51 ip4:119.207.73.52 ip4:121.156.125.187 ip4:13.124.111.122 ip4:40.82.129.38 ip4:112.216.251.2 ip4:211.184.191.166 ip4:211.184.191.164 ip4:211.184.191.161 ip4:119.207.73.124 ip4:119.207.73.16 ~all	3600
chungdahm.com	google-site-verification=gSwR-EIhrNpIWZUymxSgZg0KqmTjf76tG35FLrMNzBA	3600

ns01
TTL: 3600
Email address: hostmaster
Serial: 674
Refresh: 900
Retry: 600
Expire: 86400
Minimum: 3600

Chungdahm.com HTML Validation

HTML Validation Tool

Errors

Malformed byte sequence: “b4”.

Malformed byte sequence: “e3”, “be”.

Malformed byte sequence: “ee”.

Malformed byte sequence: “c7”.

Malformed byte sequence: “f8”.

Malformed byte sequence: “be”.

Malformed byte sequence: “c6”.

Malformed byte sequence: “c0”.

Malformed byte sequence: “a1”.

Malformed byte sequence: “b8”.

Malformed byte sequence: “a3”.

Malformed byte sequence: “c5”.

Malformed byte sequence: “d9”.

Malformed byte sequence: “f6”.

Malformed byte sequence: “d4”.

Malformed byte sequence: “bb”.

Malformed byte sequence: “b5”.

Malformed byte sequence: “bc”.

Malformed byte sequence: “b7”.

Malformed byte sequence: “cf”.

Malformed byte sequence: “d7”.

Malformed byte sequence: “ba”.

Malformed byte sequence: “b0”.

Malformed byte sequence: “fc”.

Malformed byte sequence: “ae”.

Malformed byte sequence: “bf”.

Malformed byte sequence: “b9”.

Malformed byte sequence: “c1”.

Malformed byte sequence: “a4”.

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

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

Malformed byte sequence: “f0”.

Malformed byte sequence: “eb”, “bb”.

Malformed byte sequence: “f3”.

Malformed byte sequence: “b3”.

Malformed byte sequence: “f7”.

Malformed byte sequence: “b1”.

Malformed byte sequence: “e2”.

Malformed byte sequence: “bd”.

Malformed byte sequence: “db”.

Malformed byte sequence: “e3”.

Malformed byte sequence: “c3”.

Malformed byte sequence: “d8”.

Malformed byte sequence: “e4”.

Malformed byte sequence: “ce”.

Malformed byte sequence: “f4”.

Malformed byte sequence: “a7”.

Malformed byte sequence: “e7”, “bf”.

Malformed byte sequence: “eb”.

Malformed byte sequence: “ed”.

Malformed byte sequence: “e8”, “bd”.

Malformed byte sequence: “a5”.

Malformed byte sequence: “ea”, “b6”.

Malformed byte sequence: “f3”, “bf”.

Malformed byte sequence: “ec”.

Malformed byte sequence: “fa”.

Malformed byte sequence: “c2”.

Malformed byte sequence: “af”.

Malformed byte sequence: “cc”.

Malformed byte sequence: “e5”.

Malformed byte sequence: “a6”.

Malformed byte sequence: “df”.

Malformed byte sequence: “fb”.

Malformed byte sequence: “ad”.

Malformed byte sequence: “f1”, “bd”, “ba”.

Malformed byte sequence: “c9”.

Malformed byte sequence: “ed”, “b0”, “b4”.

Malformed byte sequence: “cd”.

Malformed byte sequence: “c8”.

Malformed byte sequence: “c4”.

Malformed byte sequence: “f1”, “b9”.

Malformed byte sequence: “e7”, “bd”.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

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

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

The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.

The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.

Malformed byte sequence: “e6”.

Malformed byte sequence: “d6”.

Malformed byte sequence: “f0”, “b8”, “a6”.

Malformed byte sequence: “eb”, “bd”.

Malformed byte sequence: “de”.

Malformed byte sequence: “f1”.

Malformed byte sequence: “e8”, “b3”.

Malformed byte sequence: “ca”.

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

Malformed byte sequence: “e5”, “b4”.

Malformed byte sequence: “f2”.

Malformed byte sequence: “e2”, “b9”.

Malformed byte sequence: “e9”.

Malformed byte sequence: “ac”.

Malformed byte sequence: “aa”.

Malformed byte sequence: “d2”.

Malformed byte sequence: “ed”, “b4”.

Malformed byte sequence: “ed”, “b5”.

Malformed byte sequence: “e9”, “b0”.

Malformed byte sequence: “e7”.

Malformed byte sequence: “b6”.

Malformed byte sequence: “f9”.

Malformed byte sequence: “f1”, “b3”, “aa”.

Malformed byte sequence: “ed”, “bc”.

Malformed byte sequence: “eb”, “bc”.

Malformed byte sequence: “f5”.

Attribute “outclass” not allowed on element “li” at this point.

Attribute “overclass” not allowed on element “li” at this point.

Malformed byte sequence: “e3”, “bc”.

Malformed byte sequence: “d0”.

Warnings

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Empty heading.

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

NON-DOCUMENT-ERROR

Too many messages.

Chungdahm.com Desktop Insights

Desktop Page Insights Tool

Last tested: 11/05/2019

Desktop

Desktop Speed

48%

Optimize images

Leverage browser caching

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

Minify JavaScript

Prioritize visible content

Minify HTML

Enable compression

Desktop Resource Breakdown

Total Resources	75
Number of Hosts	10
Static Resources	38
JavaScript Resources	19
CSS Resources	3

Chungdahm.com Mobile Insights

Mobile Page Insights Tool

Last tested: 09/06/2019

Mobile

Mobile Usability

96%

Configure the viewport

Size tap targets appropriately

Mobile Speed

52%

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

Optimize images

Leverage browser caching

Prioritize visible content

Minify JavaScript

Minify HTML

Enable compression

Mobile Resource Breakdown

Total Resources	56
Number of Hosts	10
Static Resources	27
JavaScript Resources	19
CSS Resources	3

Chungdahm.com Typos

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Chungdahm.com 청담어학원 | April어학원 | CMS 영재교육센터 | CMS 영재관 | 해결머리가 트인다!

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Quick Summary

Chungdahm.com General Information

Chungdahm.com Safety Information

Chungdahm.com Server Information

Chungdahm.com Domain Name Information

Chungdahm.com HTML Validation

Chungdahm.com Desktop Insights

Chungdahm.com Mobile Insights

Chungdahm.com Typos