WWW.RTSAK.COM - codeforces.com

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codeforces.com checked at 2025-09-06T16:57:35.076Z 170ms 138/138/138 100% R:11

`codeforces.com`

MX	`mx.yandex.net`
		A	2a02:6b8::311 ^{🇷🇺 Yandex}
			PTR	`mxfront.stable.qloud-b.yandex.net`
		A	77.88.21.249^{🇷🇺 Teletech}
			PTR	`mxfront.stable.qloud-b.yandex.net`
NS	`fred.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b71 ^{🇺🇸 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c171 ^{🇨🇷 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2171 ^{🇺🇸 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
		A	108.162.193.113^{🇺🇸 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
		A	172.64.33.113^{🇺🇸 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
		A	173.245.59.113^{🇺🇸 Cloudflare}
			PTR	`fred.ns.cloudflare.com`
NS	`jean.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a79 ^{🇺🇸 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c079 ^{🇨🇷 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2079 ^{🇺🇸 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
		A	108.162.192.121^{🇺🇸 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
		A	172.64.32.121^{🇺🇸 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
		A	173.245.58.121^{🇺🇸 Cloudflare}
			PTR	`jean.ns.cloudflare.com`
A	2606:4700:20::681a:6a4 ^{🇺🇸 Cloudflare}
A	2606:4700:20::681a:7a4 ^{🇺🇸 Cloudflare}
A	2606:4700:20::ac43:44fe ^{🇺🇸 Cloudflare}
A	104.26.6.164^Cloudflare
A	104.26.7.164^Cloudflare
A	172.67.68.254^{🇺🇸 Cloudflare}

`com`

	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`

rank #26176 globally
rank #13370 in the tld

Up
`espresso.codeforces.com`
`pubsub.codeforces.com`
`st.codeforces.com`
`www.codeforces.com`
`mx1.codeforces.com`
`sta.codeforces.com`
`assets.codeforces.com`
`polygon.codeforces.com`

Starts with same word
`codeforces.com`
`codeforces.net`
`codeforces.org`
`codeforces.ru`
`codeforces.eu`

Starts similarily
`codeforces.com`
`codeforces.net`
`frescocode.com`
`codeforces.org`
`codeforecs.s3-us-west-2.amazonaws.com`
`codeforces.ru`
`codeforces.eu`

AI analysis

Host names espresso.codeforces.com, pubsub.codeforces.com, st.codeforces.com, www.codeforces.com, mx1.codeforces.com and others fall under the parent codeforces.com.

codeforces.com is configured to point to the following six IP numbers: 2606:4700:20::681a:6a4, 2606:4700:20::681a:7a4, 2606:4700:20::ac43:44fe, 104.26.6.164, 104.26.7.164, and 172.67.68.254.

IP numbers are shared between codeforces.com and other host names such as motocrosscenter.com, blog.speedtree.com, www.helleniqenergy.gr, imark.co.il, and dynveo.fr.

Two name servers, fred.ns.cloudflare.com and jean.ns.cloudflare.com, have been delegated to codeforces.com.

The name server setup of codeforces.com is identical to that of other domains such as koparchile.cl, ostel.me, factoftheday.net, ishostedby.com, and vpn-private.net.

The name servers of codeforces.com are at least partially shared with other domains such as sweetpay.com, qjae.org, pinchpleateddrapesource.com, crhoy.info, and francehopital.com.

fred.ns.cloudflare.com and jean.ns.cloudflare.com each point to six IP numbers respectively: 2606:4700:58::adf5:3b71, 2803:f800:50::6ca2:c171, 2a06:98c1:50::ac40:2171, 108.162.193.113, 172.64.33.113, and 173.245.59.113 for fred.ns.cloudflare.com and 2606:4700:50::adf5:3a79, 2803:f800:50::6ca2:c079, 2a06:98c1:50::ac40:2079, 108.162.192.121, 172.64.32.121, and 173.245.58.121 for jean.ns.cloudflare.com.

The mail server, mx.yandex.net, handles codeforces.com.

Like other domains such as trebl.ru, codenbilisim.com, 9050.ru, stroy-resurs.ru, and wmhocasi.com, codeforces.com also has the same mail server setup.

Other domains such as allminsk.biz, listenups.com, mag-international.ru, and unichel.ru share at least some mail servers with codeforces.com.

mx.yandex.net is configured to point to two IP addresses: 2a02:6b8::311 and 77.88.21.249.

dbq