mdchallenge.com - dns.ninja

`mdchallenge.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::ac43:8937^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:5e93^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.94.147^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.137.55^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dexter.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cbe^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3be^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dexter.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23be^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dexter.ns.cloudflare.com`
		A	108.162.195.190^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	162.159.44.190^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
		A	172.64.35.190^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dexter.ns.cloudflare.com`
NS	`grannbo.ns.cloudflare.com`
		A	2606:4700:50::a29f:2696^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c296^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`grannbo.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2296^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`grannbo.ns.cloudflare.com`
		A	108.162.194.150^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	162.159.38.150^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	172.64.34.150^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
TXT	`google-site-verification=8IVrJC_-FVndlZmF2m3dUuCSOj_k0WbWO1pj9CPSv0M`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.94.147, 172.67.137.55
		IPv6 hints	2606:4700:3036::ac43:8937, 2606:4700:3037::6815:5e93
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=252, name=cloudflare-ech.com
SOA	`dexter.ns.cloudflare.com`dns@cloudflare.com serial=2407902970

`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=1783236006

Previously MX for

mdchallenge.com

Same first word

mdchallenge.com

DNS History

26 records (6 active, 20 former)

●NSdexter.ns.cloudflare.com2026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

●NSgrannbo.ns.cloudflare.com2026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

○NSns1.atom.com2026-03-21 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○NSns1.dnslink.com2016-12-06 → 2016-12-06 · 4 obs

○ 2016-05-01 21:57:04
● 2016-12-06 10:41:08
○ 2017-06-30 02:09:56
○ 2026-07-05 07:48:32

○NSns1.icontent.com2015-08-05 → 2016-05-01 · 4 obs

● 2015-08-05 20:13:54
● 2016-05-01 21:57:04
○ 2016-12-06 10:41:08
○ 2026-07-05 07:48:32

○NSns1.namebrightdns.com2017-06-30 → 2026-03-21 · 4 obs

○ 2016-12-06 10:41:08
● 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○NSns2.atom.com2026-03-21 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○NSns2.dnslink.com2016-12-06 → 2016-12-06 · 4 obs

○ 2016-05-01 21:57:04
● 2016-12-06 10:41:08
○ 2017-06-30 02:09:56
○ 2026-07-05 07:48:32

○NSns2.icontent.com2015-08-05 → 2016-05-01 · 4 obs

● 2015-08-05 20:13:54
● 2016-05-01 21:57:04
○ 2016-12-06 10:41:08
○ 2026-07-05 07:48:32

○NSns2.namebrightdns.com2017-06-30 → 2026-03-21 · 4 obs

○ 2016-12-06 10:41:08
● 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○MXmail.b-io.co2016-12-06 → 2016-12-06 · 4 obs

○ 2016-05-01 21:57:04
● 2016-12-06 10:41:08
○ 2017-06-30 02:09:56
○ 2026-07-05 07:48:32

○MXmail1.namebrightmail.com2017-06-30 → 2026-03-21 · 4 obs

○ 2016-12-06 10:41:08
● 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○MXmail2.namebrightmail.com2017-06-30 → 2026-03-21 · 4 obs

○ 2016-12-06 10:41:08
● 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○MXmdchallenge.com2015-08-05 → 2016-05-01 · 4 obs

● 2015-08-05 20:13:54
● 2016-05-01 21:57:04
○ 2016-12-06 10:41:08
○ 2026-07-05 07:48:32

○A104.130.196.2532015-08-05 → 2016-05-01 · 4 obs

● 2015-08-05 20:13:54
● 2016-05-01 21:57:04
○ 2016-12-06 10:41:08
○ 2026-07-05 07:48:32

●A104.21.94.1472026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

●A172.67.137.552026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

○A209.15.13.1342016-12-06 → 2016-12-06 · 4 obs

○ 2016-05-01 21:57:04
● 2016-12-06 10:41:08
○ 2017-06-30 02:09:56
○ 2026-07-05 07:48:32

○A2600:1f18:4ae:c607:5974:bfa8:d54b:7fe52026-03-21 → 2026-03-21 · 3 obs

○ 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○A2600:1f18:4ae:c608:1ae1:9fc3:6ee2:84dd2026-03-21 → 2026-03-21 · 3 obs

○ 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

●A2606:4700:3036::ac43:89372026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

●A2606:4700:3037::6815:5e932026-07-05 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
● 2026-07-05 07:48:32

○A44.208.83.1802026-03-21 → 2026-03-21 · 3 obs

○ 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○A52.20.84.622026-03-21 → 2026-07-05 · 2 obs

○ 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○A54.84.240.2352026-03-21 → 2026-03-21 · 3 obs

○ 2017-06-30 02:09:56
● 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

○CNAMEurlforward.namebright.com2017-06-30 → 2017-06-30 · 3 obs

● 2017-06-30 02:09:56
○ 2026-03-21 16:02:30
○ 2026-07-05 07:48:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
mdchallenge.com	grannbo.ns.cloudflare.com, dexter.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.150

NS records: grannbo.ns.cloudflare.com, dexter.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mdchallenge.com (unsigned zone)

⏱️ Timing

Total: 229ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.94.147, 172.67.137.55`
AAAA	2	`2606:4700:3036::ac43:8937, 2606:4700:3037::6815:5e93`
NS	2	`dexter.ns.cloudflare.com, grannbo.ns.cloudflare.com`
TXT	1	`google-site-verification=8IVrJC_-FVndlZm`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dexter.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mdchallenge.com points to the four IP addresses 104.21.94.147, 172.67.137.55, 2606:4700:3036::ac43:8937 and 2606:4700:3037::6815:5e93.

Two other host names, along with www.ervtdgkyqbsdd.website, mymavitur.com and westoil.ca, also share IP numbers with mdchallenge.com.

Name Servers

mdchallenge.com has two authoritative name servers — dexter.ns.cloudflare.com and grannbo.ns.cloudflare.com.

mdchallenge.com shares its NS records with other domains, for example facemanagement.com, taxstreams.com, reprod.com and two others.

At least some of mdchallenge.com's name servers are shared with other domains, for example kiabacca.com, thelarsens.co, hockeytown.eu and two more.

These name servers tend to be used in conjunction with the name servers chin.ns.cloudflare.com.

DNS names with 6 IP addresses:

dexter.ns.cloudflare.com points to 108.162.195.190, 162.159.44.190, 172.64.35.190 and 3 other IP addresses.

grannbo.ns.cloudflare.com points to 108.162.194.150, 162.159.38.150, 172.64.34.150 and 3 other IP addresses.