`mail.addcom21.com`

CNAME	`addcom21.com`
DNSSEC	⚠️ Not signed
A	116.126.143.68^{🇰🇷 SKB-NET116.126.0.0/16 SK Broadband}
NS	`addcom21.com` ⭐
		A	116.126.143.68^{🇰🇷 SKB-NET116.126.0.0/16 SK Broadband}
NS	`ns1.cafe24.co.kr`
		A	112.175.246.232^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`gjit.kr`
			PTR	`snoweb.kr`
			PTR	`sinc2030.co.kr`
		A	112.175.246.233^{🇰🇷 KT-NET112.168.0.0/13}
		A	175.125.93.136^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
		A	175.125.93.137^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
NS	`ns1.cafe24.com`
		A	112.175.246.230^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`ip-112-175-246-230.defastlink.net`
		A	112.175.246.231^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`ip-112-175-246-231.defastlink.net`
		A	116.126.143.242^{🇰🇷 SKB-NET116.126.0.0/16 SK Broadband}
			PTR	`ip-116-126-143-242.defastlink.net`
		A	175.125.93.134^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
			PTR	`ip-175-125-93-134.defastlink.net`
		A	175.125.93.135^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
			PTR	`ip-175-125-93-135.defastlink.net`
NS	`ns2.cafe24.co.kr`
		A	112.175.247.232^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`snoweb.kr`
			PTR	`sarchi.co.kr`
		A	112.175.247.233^{🇰🇷 KT-NET112.168.0.0/13}
		A	175.125.93.146^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
		A	175.125.93.147^{🇰🇷 SKB-NET175.120.0.0/13 SKB summary}
NS	`ns2.cafe24.com`
		A	1.226.85.4^{🇰🇷 SKB-NET1.224.0.0/13 auto-generated route object for 1.224.0.0/13}
			PTR	`ip-1-226-85-4.defastlink.net`
		A	1.234.0.4^{🇰🇷 SKB-NET1.232.0.0/13 auto-generated route object for 1.232.0.0/13}
			PTR	`ip-1-234-0-4.defastlink.net`
		A	112.175.11.4^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`ip-112-175-11-4.defastlink.net`
		A	112.175.12.4^{🇰🇷 KT-NET112.168.0.0/13}
			PTR	`ip-112-175-12-4.defastlink.net`
MX	`kr1-aspmx1.worksmobile.com` ⭐
		A	125.209.209.251^{🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform}
			PTR	`crcvmail.worksmobile.com`
MX	`kr1-aspmx2.worksmobile.com`⁽²⁰⁾
		A	125.209.209.251^{🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform}
			PTR	`crcvmail.worksmobile.com`
TXT	`v=spf1 include:spf.worksmobile.com ~all`
SOA	`addcom21.com`postmaster@addcom21.com serial=20240528

`addcom21.com`

	DNSSEC	⚠️ Not signed
	A	116.126.143.68^{🇰🇷 SKB-NET116.126.0.0/16 SK Broadband}
	NS	`addcom21.com` ⭐
	NS	`ns1.cafe24.co.kr`
	NS	`ns1.cafe24.com`
	NS	`ns2.cafe24.co.kr`
	NS	`ns2.cafe24.com`
	MX	`kr1-aspmx1.worksmobile.com` ⭐
	MX	`kr1-aspmx2.worksmobile.com`⁽²⁰⁾
	TXT	`v=spf1 include:spf.worksmobile.com ~all`
	SOA	`addcom21.com`postmaster@addcom21.com serial=20240528

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DNS History

1 record (1 active, 0 former)

●CNAMEaddcom21.com2026-02-18 → 2026-03-22 · 2 obs

● 2026-02-18 15:50:06
● 2026-03-22 17:56:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	f.gtld-servers.net, m.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net...	-
addcom21.com	ns2.cafe24.com, ns1.cafe24.com, ns2.cafe24.co.kr, ns1.cafe24.co.kr	9 records

✅ Authoritative Response

Server: 112.175.246.230

NS records: ns2.cafe24.com, ns1.cafe24.com, ns2.cafe24.co.kr, ns1.cafe24.co.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for addcom21.com (unsigned zone)

⏱️ Timing

Total: 1231ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`addcom21.com`

📌 Glue Records Collected

Total: 9

Out-of-bailiwick: 9 (ns2.cafe24.com, ns2.cafe24.com, ns2.cafe24.com...)

Analysis

IP Addresses

mail.addcom21.com points to a single IP number: 116.126.143.68.

other host names for instance semtec.biz, boseung.kr, sammtec.net, jubileelove.com and r-geo.com share IP numbers with mail.addcom21.com.

Name Servers

mail.addcom21.com is delegated to five name servers: addcom21.com, ns1.cafe24.com, ns2.cafe24.com, ns1.cafe24.co.kr and ns2.cafe24.co.kr.

mail.addcom21.com at least partially shares name servers with other domains, for instance arww.kr, bomdong.com, kygstudio.com, icf24.com and flipevil.com.