`rbrain.vn`

DNSSEC	⚠️ Not signed
A	123.30.136.234^{🇻🇳 VDC123.30.136.0/24 VNPT}
		PTR	`c123234.vinahost.org`
NS	`ns1.matbao.vn` ⭐ ⚠️ Not in parent delegation
		A	13.250.228.99^{🇸🇬 Amazon13.250.0.0/15 EC2 SIN prefix}
			PTR	`ec2-13-250-228-99.ap-southeast-1.compute.amazonaws.com`
		A	103.110.128.60^{🇻🇳 AXYS-VN103.110.128.0/23}
NS	`ns1.matbao.com` ⚠️ Not in zone NS records
		A	13.250.228.99^{🇸🇬 Amazon13.250.0.0/15 EC2 SIN prefix}
			PTR	`ec2-13-250-228-99.ap-southeast-1.compute.amazonaws.com`
		A	103.110.128.60^{🇻🇳 AXYS-VN103.110.128.0/23}
NS	`ns2.matbao.com` ⚠️ Not in zone NS records
		A	35.198.203.127^{🇸🇬 Google35.198.192.0/20}
			PTR	`127.203.198.35.bc.googleusercontent.com`
		A	103.138.89.11^{🇻🇳 VNPT-AS-VN103.138.88.0/23 VNPT-NET}
NS	`ns2.matbao.vn` ⚠️ Not in parent delegation
		A	35.198.203.127^{🇸🇬 Google35.198.192.0/20}
			PTR	`127.203.198.35.bc.googleusercontent.com`
		A	103.138.89.11^{🇻🇳 VNPT-AS-VN103.138.88.0/23 VNPT-NET}
MX	`mail.rbrain.vn` ⭐
		A	123.30.136.234^{🇻🇳 VDC123.30.136.0/24 VNPT}
			PTR	`c123234.vinahost.org`
SOA	`ns1.matbao.vn`admin@matbao.com 2023-05-29 #3

`vn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`dns-master.vnnic.vn` ⭐
	NS	`a.dns-servers.vn`
	NS	`b.dns-servers.vn`
	NS	`c.dns-servers.vn`
	NS	`d.dns-servers.vn`
	NS	`e.dns-servers.vn`
	NS	`f.dns-servers.vn`
	NS	`g.dns-servers.vn`
	NS	`h.dns-servers.vn`
	SOA	`dns-master.vnnic.vn`postmaster@vnnic.vn serial=2030750016

Subdomains

mail.rbrain.vn

cpcalendars.rbrain.vn

cpanel.rbrain.vn

webmail.rbrain.vn

autodiscover.rbrain.vn

webdisk.rbrain.vn

www.rbrain.vn

cpcontacts.rbrain.vn

Same first word

rbrain.vn

rbrain.net

rbrain.com

rbrain.jp

Similar names

brinar.synology.me

airbrn.com

brianr.org

brrain.com

brainr.io

brianr.co.uk

irbarn.net

brainr.net

barnir.net

brianr.me

ranbir.net

brainr.at

airnbr.com

barrin.ru

rbiran.ir

birran.com

rabrin.de

rinbar.com

barnir.com

barnir.co.il

brainr.de

irbarn.com

brainr.com

inbarr.com

brinar.de

DNS History

6 records (6 active, 0 former)

●NSns1.matbao.com2026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

●NSns1.matbao.vn2026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

●NSns2.matbao.com2026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

●NSns2.matbao.vn2026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

●MXmail.rbrain.vn2026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

●A123.30.136.2342026-05-01 → 2026-05-08 · 2 obs

● 2026-05-01 14:07:14
● 2026-05-08 21:47:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...	-
rbrain.vn	ns1.matbao.com, ns2.matbao.com	-

✅ Authoritative Response

Server:103.110.128.60

NS records: ns1.matbao.com, ns2.matbao.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rbrain.vn (unsigned zone)

⏱️ Timing

Total: 1311ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`123.30.136.234`
NS	2	`ns1.matbao.vn, ns2.matbao.vn`
MX	1	`mail.rbrain.vn (pri: 10)`
SOA	1	`ns1.matbao.vn admin.matbao.com`

Analysis

Hierarchy

rbrain.vn is a parent of mail.rbrain.vn, cpcalendars.rbrain.vn, cpanel.rbrain.vn, webmail.rbrain.vn, autodiscover.rbrain.vn and several other host names.