`dongnamcable.com`

DNSSEC	⚠️ Not signed
A	221.139.49.11^{🇰🇷 SKB-NET221.138.0.0/15 SK Broadband}
NS	`ns1.aramschool.co.kr` ⭐
		A	221.139.49.17^{🇰🇷 SKB-NET221.138.0.0/15 SK Broadband}
NS	`ns1.handamaster.co.kr` ⚠️ Not in zone NS records
		A	221.139.49.17^{🇰🇷 SKB-NET221.138.0.0/15 SK Broadband}
NS	`ns2.handamaster.co.kr` ⚠️ Not in zone NS records
		A	121.125.73.38^{🇰🇷 SKB-NET121.125.0.0/16 SK Broadband}
MX	`mail.dongnamcable.com` ⭐
		A	221.139.49.11^{🇰🇷 SKB-NET221.138.0.0/15 SK Broadband}
TXT	`v=spf1 include:_spf.aramschool.co.kr ~all`
SOA	`ns1.aramschool.co.kr`support@aramschool.co.kr 2024-09-20 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774818022

Subdomains

mail.dongnamcable.com

Same first word

dongnamcable.com

DNS History

9 records (5 active, 4 former)

○NSns.epart.com2015-06-27 → 2019-12-26 · 4 obs

● 2015-06-27 06:10:56
● 2019-12-26 19:37:12
○ 2026-03-29 21:07:38
○ 2026-03-29 21:07:40

●NSns1.aramschool.co.kr2026-03-29 → 2026-03-29 · 3 obs

○ 2019-12-26 19:37:12
● 2026-03-29 21:07:38
● 2026-03-29 21:07:40

○NSns1.epart.com2015-06-27 → 2019-12-26 · 4 obs

● 2015-06-27 06:10:56
● 2019-12-26 19:37:12
○ 2026-03-29 21:07:38
○ 2026-03-29 21:07:40

●NSns1.handamaster.co.kr2026-03-29 → 2026-03-29 · 3 obs

○ 2019-12-26 19:37:12
● 2026-03-29 21:07:38
● 2026-03-29 21:07:40

●NSns2.handamaster.co.kr2026-03-29 → 2026-03-29 · 3 obs

○ 2019-12-26 19:37:12
● 2026-03-29 21:07:38
● 2026-03-29 21:07:40

●MXmail.dongnamcable.com2015-06-27 → 2026-03-29 · 2 obs

● 2015-06-27 06:10:56
● 2026-03-29 21:07:40

○A110.45.147.1942015-06-27 → 2016-05-07 · 4 obs

● 2015-06-27 06:10:56
● 2016-05-07 11:48:48
○ 2017-02-14 12:53:58
○ 2026-03-29 21:07:40

○A183.111.115.532017-02-14 → 2019-12-26 · 5 obs

○ 2016-05-07 11:48:48
● 2017-02-14 12:53:58
● 2019-12-26 19:37:12
○ 2026-03-29 21:07:38
○ 2026-03-29 21:07:40

●A221.139.49.112026-03-29 → 2026-03-29 · 3 obs

○ 2019-12-26 19:37:12
● 2026-03-29 21:07:38
● 2026-03-29 21:07:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
dongnamcable.com	ns1.handamaster.co.kr, ns2.handamaster.co.kr	-

✅ Authoritative Response

Server:221.139.49.17

NS records: ns1.handamaster.co.kr, ns2.handamaster.co.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dongnamcable.com (unsigned zone)

⏱️ Timing

Total: 1050ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`221.139.49.11`
MX	1	`mail.dongnamcable.com (pri: 10)`
TXT	1	`v=spf1 include:_spf.aramschool.co.kr ~al`
SOA	1	`ns1.aramschool.co.kr support.aramschool.`

Analysis

Hierarchy

dongnamcable.com is the parent of mail.dongnamcable.com.

IP Addresses

dongnamcable.com resolves to one IP number: 221.139.49.11.

other host names including mail.iwakigolf.com, mail.kasr.or.kr, mail.hanmaumzip.or.kr, mail.dogtong.net and mail.jinjinshop.co.kr share IP numbers with dongnamcable.com.

Name Servers

dongnamcable.com is delegated to three name servers ns1.aramschool.co.kr, ns1.handamaster.co.kr and ns2.handamaster.co.kr.

dongnamcable.com at least partially shares name servers with other domains, for instance free-web.kr, jnjfood.com, neda.kr, 2xtender.com and diosoft.kr.