Ders.co.kr

Ders.co.kr Overview

ders.co.kr is a popular Korean website with a large number of daily unique users and pageviews. The website is hosted by LGDACOM, which is a well-known hosting company in Korea. The top-level domain of the website is .KR, which is the country code top-level domain (ccTLD) for South Korea.

The website seems to have a significant value of 382320 US dollars, which indicates the website has high traffic and quality content. The SSL certificate is issued by COMODO CA Limited, which is a trusted certificate authority, ensuring the website and its users' safety and security.

Regarding the website's structure, it follows a simple and easy-to-navigate layout. The homepage displays a range of categories representing the website's primary services. Users can browse the website's different categories through the navigation bar or use the search functionality to locate the required information. The website's top header also provides links to important pages such as the contact page, FAQ section, login, and registration.

The website's categories are displayed in an organized manner, making it easier for users to explore its different sections. The categories include English study, overseas study, business study, cultural study, and literature study. Each category is further divided into subcategories and relevant courses, which are listed with pictures and descriptions.

The structure of the website provides a comfortable user experience by allowing them to quickly explore its contents. The website has no inappropriate material, making it safe and family-friendly.

In conclusion, ders.co.kr provides an exceptional user experience for those who want to improve their English or study abroad. The website's layout, structure, and content showcase professional expertise, making it a valuable educational resource. The website's SSL certificate and safety features ensure user data and privacy are protected, further supporting its reputation among users.

Ders.co.kr Website Safety

Overview

Last Updated: 06/13/2026

Unknown status.

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: 12/15/2025

ders.co.kr is safe.

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

Google Safe Search

Last Updated: 06/13/2026

Not yet checked.

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: 08/30/2019

ders.co.kr 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: 11/10/2020

Unknown status.

McAfee assesses ders.co.kr 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 ders.co.kr for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 06/13/2026

ders.co.kr child safety is unknown.

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

SSL Information

SSL Checker Tool

Domain
Issuer Organization	COMODO CA Limited
Issuer	PositiveSSL CA 2
Algorithm	RSA-SHA1
Valid form	08/07/2014
Expiration	08/07/2015
Signed	Certificate is not self signed
Additional Domains	hamchocorea.com sken.kr stresswellbeingclinic.com www.artnose.co.kr www.khanji.co.kr

Ders.co.kr Rank History

Alexa Rank shows how popular ders.co.kr is in comparison with other sites. The most popular site has Alexa Rank equals 1. If ders.co.kr 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 ders.co.kr and pageviews on ders.co.kr over the past 3 months.

Ders.co.kr Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 16509

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

Last Update: 06/08/2026

#
# 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.
#

Ders.co.kr Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

query : ders.co.kr

# KOREAN(UTF8)

도메인이름 : ders.co.kr
등록인 : (주)서웅이엔씨
등록인 주소 : 서울 강남구 개포4동 1189번지 영은빌딩 3층
등록인 우편번호 : 135961
책임자 : (주)서웅이엔씨
책임자 전자우편 : pdddrain@naver.com
책임자 전화번호 : 02-571-0132
등록일 : 2012. 03. 14.
최근 정보 변경일 : 2012. 05. 08.
사용 종료일 : 2024. 03. 14.
정보공개여부 : Y
등록대행자 : (주)가비아(http://www.gabia.co.kr)
DNSSEC : 미서명

1차 네임서버 정보
호스트이름 : ns1.new.pe.kr
IP 주소 : 182.162.94.3

2차 네임서버 정보
호스트이름 : ns2.new.pe.kr
IP 주소 : 182.162.95.3

네임서버 이름이 .kr이 아닌 경우는 IP주소가 보이지 않습니다.

# ENGLISH

Domain Name : ders.co.kr
Registrant : SEO WOONG E&C Co.,Ltd
Registrant Address : Gaepo 4-dong, Gangnam-gu, Seoul 1189, YonngEun B/D 404,
Registrant Zip Code : 135961
Administrative Contact(AC) : SEO WOONG E&C Co.,Ltd
AC E-Mail : pdddrain@naver.com
AC Phone Number : 02-571-0132
Registered Date : 2012. 03. 14.
Last Updated Date : 2012. 05. 08.
Expiration Date : 2024. 03. 14.
Publishes : Y
Authorized Agency : Gabia, Inc.(http://www.gabia.co.kr)
DNSSEC : unsigned

Primary Name Server
Host Name : ns1.new.pe.kr
IP Address : 182.162.94.3

Secondary Name Server
Host Name : ns2.new.pe.kr
IP Address : 182.162.95.3

- KISA/KRNIC WHOIS Service -

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Ders.co.kr HTML Check

HTML Validation Tool

Errors

Legacy encoding “euc-kr” used. Documents must use UTF-8.

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

Bad value “text/html; charset=euc-kr” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.

Bad value “imagetoolbar” for attribute “http-equiv” on element “meta”.

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

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

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

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

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

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

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

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

The “valign” 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.

Element “area” is missing required attribute “alt”.

Element “object” is missing one or more of the following attributes: “data”, “type”.

The “classid” attribute on the “object” element is obsolete. Use the “data” and “type” attributes to invoke plugins. To set a parameter with the name “classid”, use the “param” element.

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

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

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

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

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

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

Stray end tag “div”.

Warnings

The “type” attribute for the “style” element is not needed and should be omitted.

The “type” attribute is unnecessary for JavaScript resources.

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.

Ders.co.kr Common Typos

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Ders.co.kr

Ders.co.kr Overview

Ders.co.kr Website Safety

Ders.co.kr Rank History

Ders.co.kr Hosting Information

Ders.co.kr Domain Registration and Settings

Ders.co.kr HTML Check

Ders.co.kr Similar Audits

Ders.co.kr Common Typos