codeforces.net - dns.ninja

`codeforces.net`

DNSSEC	⚠️ Not signed
A	127.0.0.1
NS	`fred.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b71^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`fred.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c171^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`fred.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2171^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`fred.ns.cloudflare.com`
		A	108.162.193.113^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`fred.ns.cloudflare.com`
		A	172.64.33.113^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`fred.ns.cloudflare.com`
		A	173.245.59.113^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`fred.ns.cloudflare.com`
NS	`jean.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a79^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jean.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c079^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jean.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2079^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jean.ns.cloudflare.com`
		A	108.162.192.121^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jean.ns.cloudflare.com`
		A	172.64.32.121^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jean.ns.cloudflare.com`
		A	173.245.58.121^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jean.ns.cloudflare.com`
SOA	`fred.ns.cloudflare.com`dns@cloudflare.com serial=2405844122

`net`

	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=1784347482

Subdomains

www.codeforces.net

Same first word

codeforces.netlify.app

codeforces.com

codeforces.net

codeforces.org

codeforces.ru

codeforces.me

Similar names

codeforecs.s3-us-west-2.amazonaws.com

codesforce.com

frescocode.com

DNS History

6 records (3 active, 3 former)

○NSdns1.webdrive.ru2015-07-21 → 2017-01-09 · 4 obs

● 2015-07-21 23:10:26
● 2017-01-09 06:32:18
○ 2026-03-10 13:33:38
○ 2026-07-18 04:12:22

○NSdns2.webdrive.ru2015-07-21 → 2017-01-09 · 4 obs

● 2015-07-21 23:10:26
● 2017-01-09 06:32:18
○ 2026-03-10 13:33:38
○ 2026-07-18 04:12:22

●NSfred.ns.cloudflare.com2026-03-10 → 2026-07-18 · 3 obs

○ 2017-01-09 06:32:18
● 2026-03-10 13:33:38
● 2026-07-18 04:12:22

●NSjean.ns.cloudflare.com2026-03-10 → 2026-07-18 · 3 obs

○ 2017-01-09 06:32:18
● 2026-03-10 13:33:38
● 2026-07-18 04:12:22

●A127.0.0.12026-03-10 → 2026-07-18 · 3 obs

○ 2017-01-09 06:32:18
● 2026-03-10 13:33:38
● 2026-07-18 04:12:22

○A89.111.166.602015-07-21 → 2017-01-09 · 4 obs

● 2015-07-21 23:10:26
● 2017-01-09 06:32:18
○ 2026-03-10 13:33:38
○ 2026-07-18 04:12:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
codeforces.net	fred.ns.cloudflare.com, jean.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.113

NS records: fred.ns.cloudflare.com, jean.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for codeforces.net (unsigned zone)

⏱️ Timing

Total: 293ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`127.0.0.1`
NS	2	`fred.ns.cloudflare.com, jean.ns.cloudflare.com`
SOA	1	`fred.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

www.codeforces.net is a subdomain of codeforces.net.

IP Addresses

codeforces.net resolves to one IP address: 127.0.0.1.

123801abb4.shop, 190-211-214-248.bvconline.com.ar, mail.jobsad.vision and two other host names share IP numbers with codeforces.net.

Name Servers

The NS records for codeforces.net delegate to fred.ns.cloudflare.com and jean.ns.cloudflare.com.

codeforces.net uses the same name servers as several other domains — among them jazler.ro, bhood.in, androchem.com and two more.

The name servers of codeforces.net overlap at least partially with those of other domains — among them huaau.com, cardosotech.com, skuo.la and two more.

These name servers commonly appear in combination with the name servers fatima.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

fred.ns.cloudflare.com maps to 108.162.193.113, 172.64.33.113, 173.245.59.113 and 3 additional IP addresses.

jean.ns.cloudflare.com maps to 108.162.192.121, 172.64.32.121, 173.245.58.121 and 3 additional IP addresses.