`mail.rungbien.com`

CNAME	`mail235183.maychuemail.com`
DNSSEC	⚠️ Not signed
A	222.255.235.183^{🇻🇳 VDC222.255.235.0/24 VNPT}
		PTR	`mail235183.maychuemail.com`
		PTR	`455656.static.maychudns.com`

`rungbien.com`

	DNSSEC	⚠️ Not signed
	A	103.77.167.202^{🇻🇳 SUPERDATA103.77.167.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
	NS	`nsbak.dotvndns.com` ⭐
	NS	`ns1.dotvndns.vn`
	NS	`ns2.dotvndns.vn`
	MX	`mail235183.maychuemail.com` ⭐
	MX	`mx90183.maychuemail.net`⁽¹⁰⁾
	TXT	`v=spf1 +a +mx +ip4:221.133.22.183 +ip4:112.213.90.183 ?all`
	TXT	`v=spf1 +a +mx +ip4:112.213.90.183 +ip4:222.255.235.183 ~all`
	SOA	`nsbak.dotvndns.com`hostmaster@rungbien.com 2025-08-18 #16

Previously MX for

rungbien.com

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DNS History

2 records (1 active, 1 former)

○A112.213.90.1832015-06-04 → 2016-07-14 · 4 obs

● 2015-06-04 16:09:30
● 2016-07-14 15:39:22
○ 2026-05-12 06:10:26
○ 2026-05-12 06:10:30

●CNAMEmail235183.maychuemail.com2026-05-12 → 2026-05-12 · 2 obs

● 2026-05-12 06:10:26
● 2026-05-12 06:10:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, h.gtld-servers.net, m.gtld-servers.net, j.gtld-servers.net...	-
rungbien.com	nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn	2 records

✅ Authoritative Response

Server:112.213.89.22

NS records: nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rungbien.com (unsigned zone)

⏱️ Timing

Total: 1763ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mail235183.maychuemail.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (nsbak.dotvndns.com, nsbak.dotvndns.com)

Analysis

IP Addresses

mail.rungbien.com resolves to a single IP address: 222.255.235.183.

Other host names such as mail.minhanhgarment.com, mail235183.maychuemail.com, 455656.static.maychudns.com and mail.dinhthien.com.vn share IP numbers with mail.rungbien.com.

mail.rungbien.com - robtex.com