`testonline.vn`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:29a1^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:9439^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.41.161^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.148.57^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`amir.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amir.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`amir.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`amir.ns.cloudflare.com`
		A	108.162.193.62^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amir.ns.cloudflare.com`
		A	172.64.33.62^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amir.ns.cloudflare.com`
		A	173.245.59.62^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`amir.ns.cloudflare.com`
NS	`tani.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ae0^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0e0^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tani.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20e0^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tani.ns.cloudflare.com`
		A	108.162.192.224^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	172.64.32.224^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
		A	173.245.58.224^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tani.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c23::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadrs-in-f27.1e100.net`
		A	172.253.62.27^{🇺🇸 Google172.253.62.0/24}
			PTR	`bc-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.27^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.27^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f27.1e100.net`
TXT	`brevo-code:26bb3f5952740b58e716858ceeac1bdc`
TXT	`google-site-verification=y-AwpCxnTggh-y1xWm6BsC8e38N3vawix0kt2YDWSYo`
TXT	`vespf1 include_spf.google.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.41.161, 172.67.148.57
		IPv6 hints	2606:4700:3033::6815:29a1, 2606:4700:3035::ac43:9439
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=174, name=cloudflare-ech.com
SOA	`amir.ns.cloudflare.com`dns@cloudflare.com serial=2409011422

`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 2031-01-15 #43

Subdomains

sentry.testonline.vn

app.testonline.vn

Same first word

testonline.az

testonline.icu

testonline.xyz

testonline.fr

testonline.top

testonline.vn

testonline.com

testonline.it

testonline.cl

testonline.biz

Similar names

DNS History

12 records (11 active, 1 former)

●NSamir.ns.cloudflare.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●NStani.ns.cloudflare.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●MXalt1.aspmx.l.google.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●MXalt2.aspmx.l.google.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●MXalt3.aspmx.l.google.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●MXalt4.aspmx.l.google.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●MXaspmx.l.google.com2026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●A104.21.41.1612026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

●A172.67.148.572026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

○A2606:4700:3031::6815:29a12026-07-03 → 2026-07-03 · 3 obs

● 2026-07-03 22:58:40
○ 2026-07-09 18:46:32
○ 2026-07-18 16:28:04

●A2606:4700:3033::6815:29a12026-07-09 → 2026-07-18 · 3 obs

○ 2026-07-03 22:58:40
● 2026-07-09 18:46:32
● 2026-07-18 16:28:04

●A2606:4700:3035::ac43:94392026-07-03 → 2026-07-18 · 2 obs

● 2026-07-03 22:58:40
● 2026-07-18 16:28:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
vn	d.dns-servers.vn, f.dns-servers.vn, h.dns-servers.vn, c.dns-servers.vn...	-
testonline.vn	amir.ns.cloudflare.com, tani.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.62

NS records: amir.ns.cloudflare.com, tani.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for testonline.vn (unsigned zone)

⏱️ Timing

Total: 2164ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.41.161, 172.67.148.57`
AAAA	2	`2606:4700:3033::6815:29a1, 2606:4700:3035::ac43:9439`
NS	2	`amir.ns.cloudflare.com, tani.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	3	`brevo-code:26bb3f5952740b58e716858ceeac1, google-site-verification=y-AwpCxnTggh-y1...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`amir.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

sentry.testonline.vn and app.testonline.vn are both subdomains of testonline.vn.

IP Addresses

testonline.vn directs to four IP numbers, which are 104.21.41.161, 172.67.148.57, 2606:4700:3033::6815:29a1 and 2606:4700:3035::ac43:9439.

ashowimobiliaria.com.br, naveselectric.com, rsgoldbar.com and two other host names share IP numbers with testonline.vn.

Name Servers

testonline.vn is served by two delegated name servers, amir.ns.cloudflare.com and tani.ns.cloudflare.com.

testonline.vn uses the same name servers as several other domains — among them duhocmy.edu.vn, luyenthitoeic.edu.vn, ndev.tk and two more.

The name servers of testonline.vn overlap at least partially with those of other domains — among them smallpaths.pl, ozkayali.com.tr, walleyecapital.com and two more.

Hostnames that resolve to 6 IP addresses:

amir.ns.cloudflare.com carries IP addresses 108.162.193.62, 172.64.33.62 and 173.245.59.62, with 3 other addresses beyond those.

tani.ns.cloudflare.com carries IP addresses 108.162.192.224, 172.64.32.224 and 173.245.58.224, with 3 other addresses beyond those.