lguplus.co.kr - DNS, WHOIS, DMARC and SPF of the domain name

Summary

Registrar: —
Status: clientTransferProhibited
Created on: April 14, 2010
Expires on: April 14, 2028
Name servers: ns.lguplus.co.kr, nsdr.lguplus.co.kr
Mail servers: smtp1.lguplus.co.kr
DMARC: Monitoring
SPF: Soft
DKIM: No key found among the common selectors
Website: See the website

Spoofing protection (DMARC)

Monitoring

E-mails spoofing this domain are only reported, not blocked.

DMARC tells mail servers what to do with an e-mail that claims to come from lguplus.co.kr but fails SPF and DKIM checks.

Policy: Monitoring
Subdomain policy: Monitoring
Messages covered: 100%
DKIM alignment: Relaxed
SPF alignment: Relaxed
Aggregate reports: —
Failure reports: —

Record

v=DMARC1; p=none;

Authorized senders (SPF)

Soft

E-mails sent by any other server are accepted but flagged as suspicious.

SPF lists the servers allowed to send e-mails for lguplus.co.kr.

Rule	Value	Result
ip4	210.96.194.13	Allowed
ip4	210.96.194.14	Allowed
include	spf-a.lguplus.co.kr	Allowed
include	spf-b.lguplus.co.kr	Allowed
include	spf-c.lguplus.co.kr	Allowed
include	spf-d.lguplus.co.kr	Allowed
include	spf-e.lguplus.co.kr	Allowed
include	aspmx.pardot.com	Allowed
all	—	Suspicious

Top-level DNS lookups: 6 of 10 allowed

Record

v=spf1 ip4:210.96.194.13 ip4:210.96.194.14 include:spf-a.lguplus.co.kr include:spf-b.lguplus.co.kr include:spf-c.lguplus.co.kr include:spf-d.lguplus.co.kr include:spf-e.lguplus.co.kr include:aspmx.pardot.com ~all

MX, SPF, DKIM and DMARC: the e-mail records

Four DNS records make a domain's e-mail work. MX says where e-mails sent to lguplus.co.kr arrive; SPF, DKIM and DMARC let mail servers check that an e-mail claiming to come from lguplus.co.kr was really sent by this domain, which protects it against spoofing.

MX

An MX (Mail Exchanger) record designates a server that receives e-mails sent to the domain. When someone writes to an @lguplus.co.kr address, their mail server queries the DNS for the domain's MX records, then delivers the message to the server they point to.

Example record

lguplus.co.kr  MX  10 mx1.lguplus.co.kr.
lguplus.co.kr  MX  20 mx2.lguplus.co.kr.

What the record contains

10, 20: Priority: the server with the lowest number is tried first. Servers with equal priority share the load.
mx1.lguplus.co.kr.: Host name of the mail server. It must point to an A or AAAA record: an IP address or an alias (CNAME) is not allowed here.
0 .: An MX "0 .", called a null MX, declares that the domain accepts no e-mail: sending servers give up at once instead of retrying.

Declaring at least two servers with different priorities avoids losing e-mails during an outage: sending servers retry for several days and fall back on the backup server. Without any MX, they try to deliver directly to the IP address of the domain.

SPF

SPF (Sender Policy Framework) is a TXT record listing the servers allowed to send e-mails on behalf of the domain. The receiving server checks that the sender is on this list. The final "all" rule says what to do with other servers: reject them (-all), flag their e-mails as suspicious (~all) or make no decision (?all).

Example record

lguplus.co.kr  TXT  "v=spf1 mx include:_spf.google.com ip4:192.0.2.10 -all"

What the record contains

v=spf1: Identifies the record as an SPF policy. It must come first.
ip4, ip6: Allows a specific IP address or an address range, for example ip4:192.0.2.0/24.
a, mx: Allows the addresses of the domain itself (A record) or those of its mail servers (MX).
include: Allows the servers of another domain, usually a sending service: include:_spf.google.com for Google Workspace.
-all, ~all: Final rule, applied to every other server. Its qualifier decides what happens to them: - rejects them, ~ flags their e-mails as suspicious, ? makes no decision, + accepts them (avoid it).

A domain must publish only one SPF record, and its evaluation cannot exceed 10 DNS lookups (include, a, mx, exists, redirect). Beyond that, mail servers treat it as invalid.

DKIM

DKIM (DomainKeys Identified Mail) signs every outgoing e-mail with a private key. The matching public key is published in a TXT record at selector._domainkey.lguplus.co.kr, so the recipient can check that the message really comes from the domain and was not altered on the way. The selector is chosen by each sending service and cannot be guessed: Dataweaz checks the most common ones (Google Workspace, Microsoft 365, Mailchimp, SendGrid…), so a key published under another selector may exist without appearing here.

Example record

google._domainkey.lguplus.co.kr  TXT  "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA…"

What the record contains

v=DKIM1: Protocol version. Optional but recommended, in which case it must come first.
k: Key algorithm: rsa, the most common, or ed25519.
p: Public key, base64-encoded. An empty value means the key has been revoked.
t: Flags: y marks a key in testing, whose failures must not be penalized; s forbids its use for subdomains.

Each sending service publishes its key under its own selector (google, selector1, k1…), which allows several keys and seamless rotation. A 2048-bit RSA key is recommended today.

DMARC

DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM. Published on _dmarc.lguplus.co.kr, it tells mail servers what to do with an e-mail that fails these checks (let it through, send it to spam or reject it) and where to send reports.

Example record

_dmarc.lguplus.co.kr  TXT  "v=DMARC1; p=quarantine; rua=mailto:[email protected]; adkim=r; aspf=r"

What the record contains

v=DMARC1: Identifies the record as a DMARC policy. It must come first.
p: Policy applied to e-mails that fail the checks: none (monitoring only), quarantine (spam folder) or reject.
sp: Subdomain policy. Without it, subdomains follow the domain's policy.
rua: Address that receives daily aggregate reports about e-mails sent on behalf of the domain, whether they pass the checks or not.
ruf: Address that receives detailed failure reports, message by message. Few providers still send them.
pct: Percentage of e-mails subject to the policy, for a gradual rollout. 100 by default.
adkim, aspf: DKIM and SPF alignment: r (relaxed, a subdomain of the same domain is enough) or s (strict, the domain must be identical).

To roll out DMARC without blocking legitimate e-mails, start with p=none and an rua address, analyze the reports to find every service sending on behalf of the domain, then move to quarantine and finally to reject.

DNS records of lguplus.co.kr

IP addresses (A and AAAA)

An A record maps the domain name to an IPv4 address: the address of the server that browsers contact to display the website. The AAAA record does the same for an IPv6 address. A domain can have several of them to spread visits across several servers.

Type	IP address
A	162.159.140.224

Name servers (NS)

NS records designate the authoritative DNS servers of the domain: they answer every question about its other records (A, MX, TXT…). They are provided by the registrar, the hosting provider or a dedicated DNS service, and several servers are declared so that the domain keeps working if one of them fails.

Server	IP address
ns.lguplus.co.kr	210.124.165.2
nsdr.lguplus.co.kr	59.186.41.26

Mail servers (MX)

MX records point to the servers that receive e-mails sent to the domain, that is to @lguplus.co.kr addresses. Each server has a priority: the one with the lowest number is tried first, the others take over if it fails. Without an MX record, the domain cannot receive e-mails.

Priority	Server	IP address
10	smtp1.lguplus.co.kr	164.124.106.34
15	smtp1.lguplus.co.kr	164.124.106.34

TXT records

TXT records hold free text. They are used to prove ownership of the domain to online services (Google, Microsoft, Facebook…) and to publish e-mail security rules: SPF on the domain itself, DMARC on _dmarc.lguplus.co.kr.

Name	Content
lguplus.co.kr	_c3boln2yx5j9f7rzrycx9q7fa61sag5
lguplus.co.kr	mongodb-site-verification=BCuRwxpBmn5hHSJ0oSFPm2yD8N3UknWB
lguplus.co.kr	mongodb-site-verification=WRxEEQ9w3wFWMKHpqghwZMdcxp6xOu4s
lguplus.co.kr	asv=f19a45cff4fd39c557103af759a62a32
lguplus.co.kr	dtm-domain-verification=OO9pfw4EAh3i2ANnTbbP2fumcRivAUPr6byqzvj75ys
lguplus.co.kr	atlassian-domain-verification=UsmVX1maz8tWdUW1teRrgJL5CZGpfA4we5tR3TipDj5T/Qob5Zjt6dQH3oU2NfU0
lguplus.co.kr	atlassian-domain-verification=1xLU3UAmUPK5a42WFwxvVAm3k0pnJcNrmzHAaFipIbAeXUjZH3cMc5Ptrvi4idOB
lguplus.co.kr	openai-domain-verificationdv-yZGitoMpV7voneOoig282iRi
lguplus.co.kr	openai-domain-verification=dv-IiQ59JRis1GRNGXRmruKEZVQ
lguplus.co.kr	hpe-greenlake-domain-verification=36457137545a724e5946334873774630587470584755686d484b4e31534b2d7a
lguplus.co.kr	jetbrains-domain-verification=udcfiicrimha5mw1l911b8ot
lguplus.co.kr	mongodb-site-verification=xpLBLqybYhaafRfLGdedzVfYIMVNbb3G
lguplus.co.kr	turingsign=57A023FC-DD64-974B-7F91-4A84FC29B4E4
lguplus.co.kr	mongodb-site-verification=gCpmsHSeBWDNgbrWuFpcUB8kuZvMT8ps
lguplus.co.kr	_g9xtz4yx3t3pevtp4ecen4kw0j4ft6w
lguplus.co.kr	atlassian-domain-verification=BD41qnRiUqr1GG4KWy8rqbfrC/HGGDI/evrQySQEzLqWjDwbxAAddgTA0Ica5yES
lguplus.co.kr	_9psk66m5g666zdndtq1lagpgnt29vn9
lguplus.co.kr	v=spf1 ip4:210.96.194.13 ip4:210.96.194.14 include:spf-a.lguplus.co.kr include:spf-b.lguplus.co.kr include:spf-c.lguplus.co.kr include:spf-d.lguplus.co.kr include:spf-e.lguplus.co.kr include:aspmx.pardot.com ~all
lguplus.co.kr	mongodb-site-verification=CUBIcBUoiCT4kFIhCRUWjkW3XCwbuZmW
lguplus.co.kr	anthropic-domain-verification-8d2men=cvgZJII3ufxoldTueG1MN24nZ
lguplus.co.kr	_16y71kgyvkqcyes9lvmovisznqz96v4
lguplus.co.kr	paloaltonetworks-site-verification=6cf98166f32a07e184b1e571c606179c37ff5b2130d7980be36505877abd83ee
lguplus.co.kr	cursor-domain-verification-5n64cm=fhe8fwqgnnK7XaW1lfjY0Ob9j
lguplus.co.kr	cursor-domain-verification-h1c248=VZsSsN5uAGNkPqM9GrL9V6FoG
lguplus.co.kr	mongodb-site-verification=whLPSUqhfGyszl1v6sGouTlsX5pcJLXF
lguplus.co.kr	Dynatrace-site-verification=692bfe6a-f556-4353-95e3-66d674c93b24__1qv1j94o83un79anoq13bhuko2
lguplus.co.kr	atlassian-domain-verification=JWunADveKtvNdpr9zCcIClmc6mC1KitIuFdApKkCqT3oI8eclOPW583o342rh5Bz
_dmarc.lguplus.co.kr	v=DMARC1; p=none;

Related IP addresses

IPv4 addresses used by lguplus.co.kr: website, name servers, mail servers and senders authorized by SPF.

IP address	Used for	/24 block
162.159.140.224	Website	162.159.140.0/24
210.124.165.2	Name server ns.lguplus.co.kr	210.124.165.0/24
59.186.41.26	Name server nsdr.lguplus.co.kr	59.186.41.0/24
164.124.106.34	Mail server smtp1.lguplus.co.kr	164.124.106.0/24
210.96.194.13	Authorized by SPF	210.96.194.0/24
210.96.194.14	Authorized by SPF	210.96.194.0/24

WHOIS of the domain lguplus.co.kr

query : lguplus.co.kr


# KOREAN(UTF8)

도메인이름                  : lguplus.co.kr
등록인                      : (주)엘지유플러스
등록인 주소                 : 서울특별시 용산구 한강대로 32 엘지유플러스
등록인 우편번호             : 04389
책임자                      : (주)엘지유플러스
책임자 전자우편             : [email protected]
책임자 전화번호             : 82-2-1644-7000
등록일                      : 2010. 04. 14.
최근 정보 변경일            : 2025. 02. 26.
사용 종료일                 : 2028. 04. 14.
정보공개여부                : Y
등록대행자                  : 메가존(주)(http://HOSTING.KR)
DNSSEC                      : 미서명
등록정보 보호               : clientTransferProhibited

1차 네임서버 정보
   호스트이름               : ns.lguplus.co.kr
   IP 주소                  : 210.124.165.2

2차 네임서버 정보
   호스트이름               : nsdr.lguplus.co.kr
   IP 주소                  : 59.186.41.26

네임서버 이름이 .kr이 아닌 경우는 IP주소가 보이지 않습니다.


# ENGLISH

Domain Name                 : lguplus.co.kr
Registrant                  : LG Uplus
Registrant Address          : lguplus Hangang-daero,, Yongsan-gu Seoul
Registrant Zip Code         : 04389
Administrative Contact(AC)  : LG Uplus
AC E-Mail                   : [email protected]
AC Phone Number             : 82-2-1644-7000
Registered Date             : 2010. 04. 14.
Last Updated Date           : 2025. 02. 26.
Expiration Date             : 2028. 04. 14.
Publishes                   : Y
Authorized Agency           : Megazone(http://HOSTING.KR)
DNSSEC                      : unsigned
Domain Status               : clientTransferProhibited

Primary Name Server
   Host Name                : ns.lguplus.co.kr
   IP Address               : 210.124.165.2

Secondary Name Server
   Host Name                : nsdr.lguplus.co.kr
   IP Address               : 59.186.41.26


- KISA/KRNIC WHOIS Service -

% Query time: 1287 msec
% WHEN: Thu Oct 01 19:48:37 UTC 2026