`checkdu.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:2da^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:81ba^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.2.218^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.129.186^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dolly.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a62^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c062^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dolly.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2062^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dolly.ns.cloudflare.com`
		A	108.162.192.98^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	172.64.32.98^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	173.245.58.98^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
NS	`walt.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b94^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c194^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`walt.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2194^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`walt.ns.cloudflare.com`
		A	108.162.193.148^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	172.64.33.148^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
		A	173.245.59.148^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`walt.ns.cloudflare.com`
MX	`_dc-mx.52f012a7159d.checkdu.com` ⭐
		A	61.7.209.120^{🇹🇭 NTPCL-AS-AP61.7.209.0/24 CAT Telecom Public Company Limited 13th CAT TELECOM TOWER NEW ROAD SRIPHRAYA BANGRAK BANGKOK THAILAND}
			PTR	`r61-7-209-120.static.phangnga.cloud`
			PTR	`r61-7-209-120.static.seaserver.net`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.2.218, 172.67.129.186
		IPv6	2606:4700:3032::6815:2da, 2606:4700:3036::ac43:81ba
SOA	`dolly.ns.cloudflare.com`dns@cloudflare.com serial=2395660668

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Same first word

checkdu.com

Similar names

ducheck.de

cdcheku.com

DNS History

22 records (7 active, 15 former)

●NSdolly.ns.cloudflare.com2017-02-17 → 2026-03-08 · 3 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
● 2026-03-08 01:38:14

○NSns13.domaincontrol.com2016-06-26 → 2016-06-26 · 4 obs

○ 2016-03-02 09:38:44
● 2016-06-26 00:42:38
○ 2017-02-17 01:11:48
○ 2026-03-08 01:38:14

○NSns14.domaincontrol.com2016-06-26 → 2016-06-26 · 4 obs

○ 2016-03-02 09:38:44
● 2016-06-26 00:42:38
○ 2017-02-17 01:11:48
○ 2026-03-08 01:38:14

○NSns61.hostinglotus.net2015-08-22 → 2016-03-02 · 4 obs

● 2015-08-22 10:33:38
● 2016-03-02 09:38:44
○ 2016-06-26 00:42:38
○ 2026-03-08 01:38:14

○NSns62.hostinglotus.net2015-08-22 → 2016-03-02 · 4 obs

● 2015-08-22 10:33:38
● 2016-03-02 09:38:44
○ 2016-06-26 00:42:38
○ 2026-03-08 01:38:14

●NSwalt.ns.cloudflare.com2017-02-17 → 2026-03-08 · 3 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
● 2026-03-08 01:38:14

●MX_dc-mx.52f012a7159d.checkdu.com2026-03-07 → 2026-03-08 · 3 obs

○ 2017-02-17 01:11:48
● 2026-03-07 21:47:50
● 2026-03-08 01:38:14

○MXdc-6a01a79d-mail.checkdu.com2017-02-17 → 2017-02-17 · 4 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
○ 2026-03-07 21:47:50
○ 2026-03-08 01:38:14

○MXmail.checkdu.com2015-08-22 → 2016-03-02 · 4 obs

● 2015-08-22 10:33:38
● 2016-03-02 09:38:44
○ 2016-06-26 00:42:38
○ 2026-03-08 01:38:14

○MXmailstore1.secureserver.net2016-06-26 → 2016-06-26 · 4 obs

○ 2016-03-02 09:38:44
● 2016-06-26 00:42:38
○ 2017-02-17 01:11:48
○ 2026-03-08 01:38:14

○MXsmtp.secureserver.net2016-06-26 → 2016-06-26 · 4 obs

○ 2016-03-02 09:38:44
● 2016-06-26 00:42:38
○ 2017-02-17 01:11:48
○ 2026-03-08 01:38:14

●A104.21.2.2182026-03-07 → 2026-03-08 · 3 obs

○ 2017-02-17 01:11:48
● 2026-03-07 21:47:50
● 2026-03-08 01:38:14

○A104.28.28.272017-02-17 → 2017-02-17 · 4 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
○ 2026-03-07 21:47:50
○ 2026-03-08 01:38:14

○A104.28.29.272017-02-17 → 2017-02-17 · 4 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
○ 2026-03-07 21:47:50
○ 2026-03-08 01:38:14

○A119.59.104.272016-03-02 → 2016-03-02 · 4 obs

○ 2015-12-02 06:49:18
● 2016-03-02 09:38:44
○ 2016-06-26 00:42:38
○ 2026-03-08 01:38:14

○A122.155.18.492015-08-22 → 2015-12-02 · 4 obs

● 2015-08-22 10:33:38
● 2015-12-02 06:49:18
○ 2016-03-02 09:38:44
○ 2026-03-08 01:38:14

●A172.67.129.1862026-03-07 → 2026-03-08 · 3 obs

○ 2017-02-17 01:11:48
● 2026-03-07 21:47:50
● 2026-03-08 01:38:14

○A2400:cb00:2048:1::681c:1c1b2017-02-17 → 2017-02-17 · 4 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
○ 2026-03-07 21:47:50
○ 2026-03-08 01:38:14

○A2400:cb00:2048:1::681c:1d1b2017-02-17 → 2017-02-17 · 4 obs

○ 2016-06-26 00:42:38
● 2017-02-17 01:11:48
○ 2026-03-07 21:47:50
○ 2026-03-08 01:38:14

●A2606:4700:3032::6815:2da2026-03-07 → 2026-03-08 · 3 obs

○ 2017-02-17 01:11:48
● 2026-03-07 21:47:50
● 2026-03-08 01:38:14

●A2606:4700:3036::ac43:81ba2026-03-07 → 2026-03-08 · 3 obs

○ 2017-02-17 01:11:48
● 2026-03-07 21:47:50
● 2026-03-08 01:38:14

○A50.63.202.582016-06-26 → 2016-06-26 · 4 obs

○ 2016-03-02 09:38:44
● 2016-06-26 00:42:38
○ 2017-02-17 01:11:48
○ 2026-03-08 01:38:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
checkdu.com	walt.ns.cloudflare.com, dolly.ns.cloudflare.com	12 records

✅ Authoritative Response

Server: 108.162.192.98

NS records: walt.ns.cloudflare.com, dolly.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for checkdu.com (unsigned zone)

⏱️ Timing

Total: 181ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.129.186, 104.21.2.218`
AAAA	2	`2606:4700:3032::6815:2da, 2606:4700:3036::ac43:81ba`
NS	2	`dolly.ns.cloudflare.com, walt.ns.cloudflare.com`
MX	1	`_dc-mx.52f012a7159d.checkdu.com (pri: 1)`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dolly.ns.cloudflare.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (walt.ns.cloudflare.com, walt.ns.cloudflare.com, walt.ns.cloudflare.com...)

Analysis

IP Addresses

checkdu.com resolves to four IP numbers: 2606:4700:3032::6815:2da, 2606:4700:3036::ac43:81ba, 104.21.2.218 and 172.67.129.186.

other host names for instance cloark.com, oo361.com, www.livedemo.site, gw.eggsys.com and 0370mq.com share IP numbers with checkdu.com.

Name Servers

checkdu.com is delegated to two name servers: dolly.ns.cloudflare.com and walt.ns.cloudflare.com.

checkdu.com shares the same name server setup as other domains, for example 6thplaneta.com, post.net, up4i.com, bovcfc.org and axisenterprisesinc.net.

checkdu.com at least partially shares name servers with other domains, for instance everydayepiphanies.co.uk, proxy-daily.com, lxb88.com, holdco.co and vervedev.com.

These name servers are commonly used with kim.ns.cloudflare.com, hank.ns.cloudflare.com and dom.ns.cloudflare.com.

Host names with six IP numbers:

dolly.ns.cloudflare.com points to: 2606:4700:50::adf5:3a62, 2803:f800:50::6ca2:c062, 2a06:98c1:50::ac40:2062, 108.162.192.98, 172.64.32.98 and 173.245.58.98; walt.ns.cloudflare.com points to: 2606:4700:58::adf5:3b94, 2803:f800:50::6ca2:c194, 2a06:98c1:50::ac40:2194, 108.162.193.148, 172.64.33.148 and 173.245.59.148.

Mail Servers

checkdu.com is handled by a single mail server, _dc-mx.52f012a7159d.checkdu.com.

Host name _dc-mx.52f012a7159d.checkdu.com points to IP address 61.7.209.120.

checkdu.com - robtex.com

checkdu.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`checkdu.com`

`com`