ctfguide.com - dns.ninja

`ctfguide.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:fed^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:d0a0^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.15.237^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.208.160^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`lady.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a7f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lady.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c07f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lady.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:207f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lady.ns.cloudflare.com`
		A	108.162.192.127^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lady.ns.cloudflare.com`
		A	172.64.32.127^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lady.ns.cloudflare.com`
		A	173.245.58.127^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lady.ns.cloudflare.com`
NS	`noel.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bd8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`noel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1d8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`noel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21d8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`noel.ns.cloudflare.com`
		A	108.162.193.216^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`noel.ns.cloudflare.com`
		A	172.64.33.216^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`noel.ns.cloudflare.com`
		A	173.245.59.216^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`noel.ns.cloudflare.com`
MX	`mx2.zoho.com` ⭐
		A	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx3.zoho.com`⁽²⁰⁾
		A	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
MX	`mx.zoho.com`⁽⁵⁰⁾
		A	204.141.43.44^{🇺🇸 ZohoAS204.141.42.0/23 Zoho Corporation}
			PTR	`mx2.zoho.com`
			PTR	`mx3.zoho.com`
			PTR	`mx6.zoho.com`
			PTR	`mx7.zoho.com`
			PTR	`mx8.zoho.com`
			PTR	`mx.zoho.com`
			PTR	`mx2.zohomail.com`
			PTR	`mx3.zohomail.com`
			PTR	`mx.zohomail.com`
TXT	`facebook-domain-verification=9ukrahbz4uuc7gbyo4iep5hzk20h1j`
TXT	`firebase=cyberjags-8b081`
TXT	`google-site-verification=O2Gtc0_rDWekIzIujXTbXs-csFGUTlncJVM_cQu3kf8`
TXT	`google-site-verification=Vbf8_U0OE-ZWjnjo3wZijFw_Qryvh7a2O-MA6gUwAw8`
TXT	`google-site-verification=iHn4IopdVPeknJ02NV7JIcXXAxS_lnT2CKsvAb9a-tE`
TXT	`replit-verify=40700025-5be0-44d5-8ec0-9153a6265c60`
TXT	`v=spf1 include:zoho.com include:_spf.firebasemail.com include:mailgun.org inc...`
TXT	`zoho-verification=zb46515678.zmverify.zoho.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.15.237, 172.67.208.160
		IPv6 hints	2606:4700:3031::6815:fed, 2606:4700:3037::ac43:d0a0
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=169, name=cloudflare-ech.com
SOA	`lady.ns.cloudflare.com`dns@cloudflare.com serial=2405989860

`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=1781373653

Same first word

ctfguide.com

DNS History

25 records (9 active, 16 former)

○NSdns1.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○NSdns1.registrar-servers.com,2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○NSdns2.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○NSdns3.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○NSdns4.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○NSdns5.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

●NSlady.ns.cloudflare.com2026-02-18 → 2026-06-13 · 3 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
● 2026-06-13 18:17:18

●NSnoel.ns.cloudflare.com2026-02-18 → 2026-06-13 · 3 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
● 2026-06-13 18:17:18

○MXeforward1.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○MXeforward2.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○MXeforward3.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○MXeforward4.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

○MXeforward5.registrar-servers.com2016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

●MXmx.zoho.com2026-02-18 → 2026-06-13 · 3 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
● 2026-06-13 18:17:18

●MXmx2.zoho.com2026-02-18 → 2026-06-13 · 3 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
● 2026-06-13 18:17:18

●MXmx3.zoho.com2026-02-18 → 2026-06-13 · 3 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
● 2026-06-13 18:17:18

●A104.21.15.2372026-02-18 → 2026-06-13 · 5 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
○ 2026-02-22 15:18:26
● 2026-02-27 03:03:32
● 2026-06-13 18:17:18

●A172.67.208.1602026-02-18 → 2026-06-13 · 5 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
○ 2026-02-22 15:18:26
● 2026-02-27 03:03:32
● 2026-06-13 18:17:18

○A188.114.96.02026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-18 07:18:54
● 2026-02-22 15:18:26
○ 2026-02-27 03:03:32
○ 2026-06-13 18:17:18

○A188.114.97.02026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-18 07:18:54
● 2026-02-22 15:18:26
○ 2026-02-27 03:03:32
○ 2026-06-13 18:17:18

○A192.64.119.1722016-03-13 → 2017-04-11 · 4 obs

● 2016-03-13 07:48:54
● 2017-04-11 05:34:38
○ 2026-02-18 07:18:54
○ 2026-06-13 18:17:18

●A2606:4700:3031::6815:fed2026-02-18 → 2026-06-13 · 5 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
○ 2026-02-22 15:18:26
● 2026-02-27 03:03:32
● 2026-06-13 18:17:18

●A2606:4700:3037::ac43:d0a02026-02-18 → 2026-06-13 · 5 obs

○ 2017-04-11 05:34:38
● 2026-02-18 07:18:54
○ 2026-02-22 15:18:26
● 2026-02-27 03:03:32
● 2026-06-13 18:17:18

○A2a06:98c1:3120::2026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-18 07:18:54
● 2026-02-22 15:18:26
○ 2026-02-27 03:03:32
○ 2026-06-13 18:17:18

○A2a06:98c1:3121::2026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-18 07:18:54
● 2026-02-22 15:18:26
○ 2026-02-27 03:03:32
○ 2026-06-13 18:17:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
ctfguide.com	lady.ns.cloudflare.com, noel.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.127

NS records: lady.ns.cloudflare.com, noel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctfguide.com (unsigned zone)

⏱️ Timing

Total: 182ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.208.160, 104.21.15.237`
AAAA	2	`2606:4700:3031::6815:fed, 2606:4700:3037::ac43:d0a0`
NS	2	`lady.ns.cloudflare.com, noel.ns.cloudflare.com`
MX	3	`mx.zoho.com (pri: 10), mx2.zoho.com (pri: 20)...`
TXT	8	`facebook-domain-verification=9ukrahbz4uu, firebase=cyberjags-8b081...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`lady.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

ctfguide.com points to four IP numbers: 104.21.15.237, 172.67.208.160, 2606:4700:3031::6815:fed and 2606:4700:3037::ac43:d0a0.

Two other host names, along with www.toomore.net, pbt.com and azuretimetracker.com, also share IP numbers with ctfguide.com.

Name Servers

DNS delegation for ctfguide.com points to two name servers: lady.ns.cloudflare.com and noel.ns.cloudflare.com.

ctfguide.com shares its NS records with other domains, for example code.edu.az, dental32clinics.com, mevtho.com and two others.

ctfguide.com partially shares its NS delegation with several other domains, including ss53ss.com, barricadeoffroad.com, selcuksports171.top and two others.

These name servers are regularly seen alongside norm.ns.cloudflare.com and susan.ns.cloudflare.com as name servers.

DNS names with 6 IP addresses:

lady.ns.cloudflare.com has IP addresses 108.162.192.127, 172.64.32.127 and 173.245.58.127, plus 3 other.

noel.ns.cloudflare.com has IP addresses 108.162.193.216, 172.64.33.216 and 173.245.59.216, plus 3 other.

Mail Servers

ctfguide.com uses three mail servers — mx2.zoho.com, mx3.zoho.com and mx.zoho.com.

There is at least a partial MX overlap between ctfguide.com and other domains, including budhq.co, openif.com, teknolinea.com.mx and two others.

Each of mx2.zoho.com, mx3.zoho.com and mx.zoho.com has one IP address, which is 204.141.43.44.

Each of mx2.zoho.com, mx3.zoho.com and mx.zoho.com resolves to 204.141.43.44.