`crtech.hk`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:4181^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:917d^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.129^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.145.125^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`aria.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a44^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aria.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c044^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`aria.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2044^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`aria.ns.cloudflare.com`
		A	108.162.192.68^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aria.ns.cloudflare.com`
		A	172.64.32.68^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aria.ns.cloudflare.com`
		A	173.245.58.68^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`aria.ns.cloudflare.com`
NS	`etienne.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c3d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etienne.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c33d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`etienne.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:233d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`etienne.ns.cloudflare.com`
		A	108.162.195.61^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etienne.ns.cloudflare.com`
		A	162.159.44.61^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etienne.ns.cloudflare.com`
		A	172.64.35.61^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`etienne.ns.cloudflare.com`
MX	`mxn.mxhichina.com` ⭐
		A	47.246.136.231^{🇺🇸 Alibaba-Cloud47.246.136.0/22 Alibaba CLoud}
			PTR	`cz-clare.com`
			PTR	`reachsmartdwell.com`
			PTR	`wevolt.tech`
		A	47.246.137.47^{🇺🇸 Alibaba-Cloud47.246.136.0/22 Alibaba CLoud}
MX	`mxw.mxhichina.com`⁽¹⁰⁾
		A	47.246.99.195^{🇺🇸 Alibaba-Cloud47.246.96.0/22 Proxy-registered route object}
			PTR	`reachsmartdwell.com`
TXT	`_b5x322adrspemjaop9tbgimmv2vhj2l`
TXT	`_igrhk28xkj5raan1ad75kt7gm5jx0m0`
TXT	`v=spf1 include:spf.mxhichina.com -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.65.129, 172.67.145.125
		IPv6 hints	2606:4700:3032::6815:4181, 2606:4700:3037::ac43:917d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=66, name=cloudflare-ech.com
SOA	`aria.ns.cloudflare.com`dns@cloudflare.com serial=2402490498

`hk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns3.hkirc.net.hk` ⭐
	NS	`c.hkirc.net.hk`
	NS	`d.hkirc.net.hk`
	NS	`m.hkirc.net.hk`
	NS	`t.hkirc.net.hk`
	NS	`u.hkirc.net.hk`
	NS	`v.hkirc.net.hk`
	NS	`x.hkirc.net.hk`
	NS	`y.hkirc.net.hk`
	NS	`z.hkirc.net.hk`
	SOA	`ns3.hkirc.net.hk`hostmaster@hkirc.net.hk serial=2074927417

Subdomains

ns1.crtech.hk

Same first word

crtech.biz

crtech.co

crtech.cn

crtech.com.au

crtech.site

crtech.online

crtech.hk

crtech.nl

crtech.com.br

crtech.tips

crtech.co.uk

crtech.co.kr

crtech.pl

crtech.ca

crtech.ru

crtech.us

crtech.org

crtech.net

crtech.mx

crtech.com

Similar names

rctech.co.in

rctech.co.uk

rctech.se

thercc.com.au

rctech.com

rctech.de

rctech.co.za

cretch.net

rctech.nl

rctech.ca

chcert.com

rctech.com.tw

rctech.eu

rctech.ac.th

rctech.biz

ctherc.com

thecrc.com

techrc.ru

techrc.com

rhctec.com

rctech.cz

rctech.net

chetcr.com

rctech.ch

rctech.ru

rctech.org

rctech.gr

rctech.com.au

chetcr.com.br

techrc.net

hccert.com

ctcher.com

thercc.org

rctech.ws

techcr.com

thercc.myshopify.com

thecrc.ca

rctech.com.ar

rctech.it

DNS History

8 records (8 active, 0 former)

●NSaria.ns.cloudflare.com2026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●NSetienne.ns.cloudflare.com2026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●MXmxn.mxhichina.com2026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●MXmxw.mxhichina.com2026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●A104.21.65.1292026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●A172.67.145.1252026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●A2606:4700:3032::6815:41812026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

●A2606:4700:3037::ac43:917d2026-04-04 → 2026-04-26 · 2 obs

● 2026-04-04 13:31:48
● 2026-04-26 06:21:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
hk	c.hkirc.net.hk, d.hkirc.net.hk, m.hkirc.net.hk, t.hkirc.net.hk...	-
crtech.hk	aria.ns.cloudflare.com, etienne.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.195.61

NS records: aria.ns.cloudflare.com, etienne.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for crtech.hk (unsigned zone)

⏱️ Timing

Total: 916ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.65.129, 172.67.145.125`
AAAA	2	`2606:4700:3037::ac43:917d, 2606:4700:3032::6815:4181`
NS	2	`aria.ns.cloudflare.com, etienne.ns.cloudflare.com`
MX	2	`mxw.mxhichina.com (pri: 10), mxn.mxhichina.com (pri: 5)`
TXT	3	`_b5x322adrspemjaop9tbgimmv2vhj2l, _igrhk28xkj5raan1ad75kt7gm5jx0m0...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`aria.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

crtech.hk is the parent of ns1.crtech.hk.

IP Addresses

Four IP numbers are pointed to by crtech.hk: 2606:4700:3032::6815:4181, 2606:4700:3037::ac43:917d, 104.21.65.129 and 172.67.145.125.

other host names including 002606.cn, kampunganggrek.or.id, www.4k(0x706f726e).com, labaveuse.com and dc-3d56f755310d.inputidea.org share IP numbers with crtech.hk.

Name Servers

crtech.hk is delegated to two name servers aria.ns.cloudflare.com and etienne.ns.cloudflare.com.

crtech.hk shares the same name server setup as other domains, for instance pinkpolestudio.com, orpheusinteractive.com, infobitservice.com, guoranmeng.cn and siskiyouwebdesign.com.

crtech.hk at least partially shares name servers with other domains, for instance corechainconnect.com, tsunami.media, elfondin.com, moneybuy.cc and goforboom.com.

these name servers are often used together with ulla.ns.cloudflare.com, audrey.ns.cloudflare.com, cory.ns.cloudflare.com and bella.ns.cloudflare.com.

Host names with six IP numbers:

Host name aria.ns.cloudflare.com points to: 2606:4700:50::adf5:3a44, 2803:f800:50::6ca2:c044, 2a06:98c1:50::ac40:2044, 108.162.192.68, 172.64.32.68 and 173.245.58.68.

Host name etienne.ns.cloudflare.com points to: 2606:4700:58::a29f:2c3d, 2803:f800:50::6ca2:c33d, 2a06:98c1:50::ac40:233d, 108.162.195.61, 162.159.44.61 and 172.64.35.61.

Mail Servers

Two mail servers handle crtech.hk: mxn.mxhichina.com and mxw.mxhichina.com.

crtech.hk shares the same mail server setup as other domains, for instance sh-zl.cn, np-metal.com, cleverunit.com, 86520.cn and noguard.shop.

crtech.hk shares some mail servers with other domains, at least partially, for instance cicjs.com, zjhappiness.com, hxd-1997.com, fjkingdee.com and wfjsp.com.

these mail servers are often used alongside mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.

Two IP numbers for a host: mxn.mxhichina.com points to 47.246.136.231 and 47.246.137.47.

One IP number for a host: mxw.mxhichina.com points to 47.246.99.195.

crtech.hk - robtex.com

crtech.hk

hk

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`crtech.hk`

`hk`