`rcong.vn`

DNSSEC	⚠️ Not signed
A	202.92.4.99^{🇻🇳 VNPT-AS-VN202.92.4.0/22 INET-VN}
NS	`ns1.matbao.com` ⭐ ⚠️ 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.vn` ⚠️ 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 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}
NS	`ns2.matbao.vn` ⚠️ 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}
TXT	`google-site-verification=-XXTaMULd0VAL8CzJRm52J8JNQngGvZstiXYhAD4F6s`
SOA	`ns1.matbao.com`admin@matbao.com 2024-09-29 #2

`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=2030754761

Subdomains

webdisk.rcong.vn

cpanel.rcong.vn

cpcalendars.rcong.vn

autodiscover.rcong.vn

mail.rcong.vn

webmail.rcong.vn

www.rcong.vn

cpcontacts.rcong.vn

Same first word

rcong.vn

Similar names

rogcn.com

grnco.net

corgn.com

gronc.com

ongrc.org

gocrn.com

cognr.com

rcngo.com

rocng.com

congr.us

conrg.com

rgcon.de

orgcn.cn

rongc.com

congr.app

ngorc.net

grcon.com

grcon.org

ngorc.com

ngorc.org.cn

crong.site

orgnc.net

gncor.com

grcno.com

cnorg.net

ocnrg.com

nrgco.co.uk

crong.net

crong.eu

grocn.com

crong.cn

ncrgo.com

rgcon.com

cngor.com

ncorg.com

DNS History

6 records (5 active, 1 former)

●NSns1.matbao.com2020-01-17 → 2026-05-10 · 2 obs

● 2020-01-17 16:41:14
● 2026-05-10 16:25:36

●NSns1.matbao.vn2026-05-01 → 2026-05-10 · 3 obs

○ 2020-01-17 16:41:14
● 2026-05-01 09:45:10
● 2026-05-10 16:25:36

●NSns2.matbao.com2020-01-17 → 2026-05-10 · 2 obs

● 2020-01-17 16:41:14
● 2026-05-10 16:25:36

●NSns2.matbao.vn2026-05-01 → 2026-05-10 · 3 obs

○ 2020-01-17 16:41:14
● 2026-05-01 09:45:10
● 2026-05-10 16:25:36

○A112.78.2.852020-01-17 → 2020-01-17 · 3 obs

● 2020-01-17 16:41:14
○ 2026-05-01 09:45:10
○ 2026-05-10 16:25:36

●A202.92.4.992026-05-01 → 2026-05-10 · 3 obs

○ 2020-01-17 16:41:14
● 2026-05-01 09:45:10
● 2026-05-10 16:25:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	a.dns-servers.vn, b.dns-servers.vn, c.dns-servers.vn, d.dns-servers.vn...	16 records
rcong.vn	ns1.matbao.vn, ns2.matbao.vn	2 records

✅ Authoritative Response

Server:103.138.89.11

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rcong.vn (unsigned zone)

⏱️ Timing

Total: 4069ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.92.4.99`
NS	2	`ns2.matbao.com, ns1.matbao.com`
TXT	1	`google-site-verification=-XXTaMULd0VAL8C`
SOA	1	`ns1.matbao.com admin.matbao.com`

📌 Glue Records Collected

Total: 18

In-bailiwick: 16 (a.dns-servers.vn, a.dns-servers.vn, b.dns-servers.vn...)

Out-of-bailiwick: 2 (ns2.matbao.vn, ns1.matbao.vn)

Analysis

Hierarchy

rcong.vn is the parent of webdisk.rcong.vn, cpanel.rcong.vn, cpcalendars.rcong.vn, autodiscover.rcong.vn, mail.rcong.vn and several other host names.

IP Addresses

rcong.vn points to a single IP: 202.92.4.99.

Other host names, for instance what.website.webmail.nhanhoc.edu.vn, seogiare.vn, webdisk.ctise.vn, edu.vn.bowmedia.vn and www.baoholaodongvn.vn share IP numbers with rcong.vn.

Name Servers

rcong.vn is delegated to four name servers: ns1.matbao.com, ns2.matbao.com, ns1.matbao.vn and ns2.matbao.vn.

rcong.vn at least partially shares its name servers with other domains, for instance leader360.com.vn, cloudteknet.com, nhen.vn, vnfocus.vn and smartbrand.vn.