`a21.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:9bbf^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:28af^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.40.175^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.155.191^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`kenia.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:265d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kenia.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c25d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kenia.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:225d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kenia.ns.cloudflare.com`
		A	108.162.194.93^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kenia.ns.cloudflare.com`
		A	162.159.38.93^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kenia.ns.cloudflare.com`
		A	172.64.34.93^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kenia.ns.cloudflare.com`
NS	`trace.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cac^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trace.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3ac^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`trace.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23ac^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`trace.ns.cloudflare.com`
		A	108.162.195.172^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trace.ns.cloudflare.com`
		A	162.159.44.172^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trace.ns.cloudflare.com`
		A	172.64.35.172^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`trace.ns.cloudflare.com`
MX	`route2.mx.cloudflare.net` ⭐
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽⁹²⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁹⁶⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
TXT	`brevo-code:7233656d553009d691d5930995fc4fd2`
TXT	`v=spf1 include:_spf.mx.cloudflare.net include:spf.brevo.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.40.175, 172.67.155.191
		IPv6 hints	2606:4700:3031::ac43:9bbf, 2606:4700:3035::6815:28af
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=56, name=cloudflare-ech.com
SOA	`kenia.ns.cloudflare.com`dns@cloudflare.com serial=2403756240

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Same first word

a21.no

a21.ch

a21.me

a21.es

a21.eu

a21.ca

a21.com.mx

a21.net

a21.kr

a21.ru

a21.it

a21.org

a21.com.cn

a21.one

a21.dev

a21.info

a21.fr

a21.nl

a21.cc

a21.gr

a21.co.kr

a21.co.uk

a21.cz

a21.mx

a21.bg

a21.cat

a21.fi

a21.se

a21.co

a21.pl

a21.myqnapcloud.com

a21.tv

a21.club

a21.at

a21.com

a21.cl

a21.dk

a21.cn

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a12.ro

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12a.ee

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12a.net

21a.org

21a.ch

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2a1.pro

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2a1.ru

a12.lv

a12.nl

12a.com.cn

21a.top

21a.cn

12a.co

21a.de

a12.us

a12.net.br

a12.cc

a12.it

a12.se

12a.me

a12.com.br

a12.org.br

a12.es

a12.be

21a.co

a12.rentals

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1a2.ru

21a.mobi

a12.fun

12a.eu

21a.net

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a12.ddns.net

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1a2.de

2a1.net

a12.cz

2a1.com

a12.at

2a1.es

a12.org

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12a.ch

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1a2.eu

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21a.nl

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a12.me

DNS History

9 records (9 active, 0 former)

●NSkenia.ns.cloudflare.com2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●NStrace.ns.cloudflare.com2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●MXroute1.mx.cloudflare.net2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●MXroute2.mx.cloudflare.net2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●MXroute3.mx.cloudflare.net2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●A104.21.40.1752026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●A172.67.155.1912026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●A2606:4700:3031::ac43:9bbf2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

●A2606:4700:3035::6815:28af2026-04-30 → 2026-05-10 · 2 obs

● 2026-04-30 12:07:16
● 2026-05-10 12:30:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	-
a21.dev	kenia.ns.cloudflare.com, trace.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.195.172

NS records: kenia.ns.cloudflare.com, trace.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for a21.dev (unsigned zone)

⏱️ Timing

Total: 766ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.155.191, 104.21.40.175`
AAAA	2	`2606:4700:3031::ac43:9bbf, 2606:4700:3035::6815:28af`
NS	2	`kenia.ns.cloudflare.com, trace.ns.cloudflare.com`
MX	3	`route2.mx.cloudflare.net (pri: 21), route1.mx.cloudflare.net (pri: 92)...`
TXT	2	`brevo-code:7233656d553009d691d5930995fc4, v=spf1 include:_spf.mx.cloudflare.net in`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`kenia.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

a21.dev maps to four IP numbers: 2606:4700:3031::ac43:9bbf, 2606:4700:3035::6815:28af, 104.21.40.175 and 172.67.155.191.

Other host names such as fitness(0x7075737379).com, notasecretanymore.com, www.triplek.co.za, klzww.top and didsomeoneclone.me share IPs with a21.dev.

Name Servers

Two name servers kenia.ns.cloudflare.com and trace.ns.cloudflare.com handle the delegation for a21.dev.

a21.dev shares the same name server setup as other domains, for example kolja-engelmann.de, deepgambling.co.uk, fluidsystem.com, andreynousi.com and mapping.org.uk.

a21.dev at least partially shares name servers with other domains, for example eastwindchinesesushi.com, arena39two.site, bjtex.com, thermic.ind.br and 7m2x9kqa.vip.

These name servers are often used together with becky.ns.cloudflare.com and everton.ns.cloudflare.com.

Host names with six IP numbers:

kenia.ns.cloudflare.com points to 2606:4700:50::a29f:265d, 2803:f800:50::6ca2:c25d, 2a06:98c1:50::ac40:225d, 108.162.194.93, 162.159.38.93 and 172.64.34.93.

trace.ns.cloudflare.com points to 2606:4700:58::a29f:2cac, 2803:f800:50::6ca2:c3ac, 2a06:98c1:50::ac40:23ac, 108.162.195.172, 162.159.44.172 and 172.64.35.172.

Mail Servers

a21.dev is handled by three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

a21.dev shares at least partially some mail servers with other domains, for instance erkbilisim.net, jeffreyinc.com, megabombs.com, idlehamster.com and webstudiodesign.biz.

Host names with six IP numbers:

route1.mx.cloudflare.net points to: 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13

route2.mx.cloudflare.net points to: 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19

route3.mx.cloudflare.net points to: 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25

a21.dev - robtex.com

a21.dev

dev

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`a21.dev`

`dev`