`ctf101.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3037::6815:78d^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:bb96^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.7.141^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.187.150^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`conrad.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c92^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`conrad.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c392^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`conrad.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2392^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`conrad.ns.cloudflare.com`
		A	108.162.195.146^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`conrad.ns.cloudflare.com`
		A	162.159.44.146^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`conrad.ns.cloudflare.com`
		A	172.64.35.146^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`conrad.ns.cloudflare.com`
NS	`summer.ns.cloudflare.com`
		A	2606:4700:50::a29f:2609^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c209^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`summer.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2209^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`summer.ns.cloudflare.com`
		A	108.162.194.9^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	162.159.38.9^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
		A	172.64.34.9^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`summer.ns.cloudflare.com`
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.7.141, 172.67.187.150
		IPv6	2606:4700:3037::6815:78d, 2606:4700:3037::ac43:bb96
SOA	`conrad.ns.cloudflare.com`dns@cloudflare.com serial=2399219281

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1773551953

rank #560035 globally
rank #42394 in the tld

Same first word

ctf101.org

Similar names

tfc101.com.tw

ftc101.com

DNS History

17 records (11 active, 6 former)

●NSconrad.ns.cloudflare.com2026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

○NSdns1.registrar-servers.com2018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

○NSdns2.registrar-servers.com2018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

●NSsummer.ns.cloudflare.com2026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

●MXeforward1.registrar-servers.com2018-05-13 → 2026-03-23 · 2 obs

● 2018-05-13 16:38:52
● 2026-03-23 15:21:44

●MXeforward2.registrar-servers.com2018-05-13 → 2026-03-23 · 2 obs

● 2018-05-13 16:38:52
● 2026-03-23 15:21:44

●MXeforward3.registrar-servers.com2018-05-13 → 2026-03-23 · 2 obs

● 2018-05-13 16:38:52
● 2026-03-23 15:21:44

●MXeforward4.registrar-servers.com2018-05-13 → 2026-03-23 · 2 obs

● 2018-05-13 16:38:52
● 2026-03-23 15:21:44

●MXeforward5.registrar-servers.com2018-05-13 → 2026-03-23 · 2 obs

● 2018-05-13 16:38:52
● 2026-03-23 15:21:44

●A104.21.7.1412026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

●A172.67.187.1502026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

○A185.199.108.1532018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

○A185.199.109.1532018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

○A185.199.110.1532018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

○A185.199.111.1532018-05-13 → 2018-05-13 · 3 obs

● 2018-05-13 16:38:52
○ 2026-03-01 12:11:30
○ 2026-03-23 15:21:44

●A2606:4700:3037::6815:78d2026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

●A2606:4700:3037::ac43:bb962026-03-01 → 2026-03-23 · 3 obs

○ 2018-05-13 16:38:52
● 2026-03-01 12:11:30
● 2026-03-23 15:21:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
ctf101.org	conrad.ns.cloudflare.com, summer.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.9

NS records: conrad.ns.cloudflare.com, summer.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctf101.org (unsigned zone)

⏱️ Timing

Total: 520ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.7.141, 172.67.187.150`
AAAA	2	`2606:4700:3037::6815:78d, 2606:4700:3037::ac43:bb96`
NS	2	`conrad.ns.cloudflare.com, summer.ns.cloudflare.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	1	`v=spf1 include:spf.efwd.registrar-server`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`conrad.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

Four IP numbers are pointed to by ctf101.org: 2606:4700:3037::6815:78d, 2606:4700:3037::ac43:bb96, 104.21.7.141 and 172.67.187.150.

other host names including mobilshop.pik.ba, s7.pik.ba, osset.ru, mainelighthousemuseum.com and wh51766.com share IP numbers with ctf101.org.

Name Servers

ctf101.org is delegated to two name servers conrad.ns.cloudflare.com and summer.ns.cloudflare.com.

ctf101.org shares the same name server setup as other domains, for instance ketua66murah.com, ketua66messi.xyz, ketua66dior.xyz, sarsonline.org and deliveryofthingsworldusa.com.

ctf101.org at least partially shares name servers with other domains, for instance chudopovarenok.ru, astra-ai.it, gyrohosting.com, facebocks.com.vn and dist-edu.com.

These name servers are commonly used alongside becky.ns.cloudflare.com and rodrigo.ns.cloudflare.com.

Host names with six IP numbers:

Host name conrad.ns.cloudflare.com points to: 2606:4700:58::a29f:2c92, 2803:f800:50::6ca2:c392, 2a06:98c1:50::ac40:2392, 108.162.195.146, 162.159.44.146 and 172.64.35.146.

Host name summer.ns.cloudflare.com points to: 2606:4700:50::a29f:2609, 2803:f800:50::6ca2:c209, 2a06:98c1:50::ac40:2209, 108.162.194.9, 162.159.38.9 and 172.64.34.9.

Mail Servers

ctf101.org is handled by five mail servers: eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com, eforward4.registrar-servers.com and eforward5.registrar-servers.com.

ctf101.org shares some mail servers with other domains, at least partially, for instance benbuddy.com, theamericansun.com, ivyz.info, powerboatskills.com and vextees.com.