codeforces.me - robtex.com
codeforces.me
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::ac43:ccdb🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::6815:4d3d🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.77.61Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.204.219🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| 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 | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.77.61, 172.67.204.219 | ||||||
| IPv6 | 2606:4700:3032::ac43:ccdb, 2606:4700:3036::6815:4d3d | ||||||
| SOA | fred.ns.cloudflare.comdns@cloudflare.com serial=2398880346 | ||||||
me
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.nic.me ⭐ 🔒 | ||||||
| NS | a2.nic.me 🔒 | ||||||
| NS | b0.nic.me 🔒 | ||||||
| NS | b2.nic.me 🔒 | ||||||
| NS | c0.nic.me 🔒 | ||||||
| SOA | a0.nic.mehostmaster@donuts.email serial=1771290442 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSfred.ns.cloudflare.com2026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
●NSjean.ns.cloudflare.com2026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
●A104.21.77.612026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
●A172.67.204.2192026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
●A2606:4700:3032::ac43:ccdb2026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
●A2606:4700:3036::6815:4d3d2026-02-27 → 2026-03-22 · 2 obs
● 2026-03-22 18:55:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| me | a0.nic.me, a2.nic.me, b0.nic.me, b2.nic.me... | - |
| codeforces.me | jean.ns.cloudflare.com, fred.ns.cloudflare.com | - |
✅ Authoritative Response
Server: 172.64.33.113
NS records: jean.ns.cloudflare.com, fred.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for codeforces.me (unsigned zone)
⏱️ Timing
Total: 404ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.204.219, 104.21.77.61 |
| AAAA | 2 | 2606:4700:3036::6815:4d3d, 2606:4700:3032::ac43:ccdb |
| NS | 2 | fred.ns.cloudflare.com, jean.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | fred.ns.cloudflare.com dns.cloudflare.co |
Analysis
IP Addresses
codeforces.me maps to four IP numbers: 2606:4700:3032::ac43:ccdb, 2606:4700:3036::6815:4d3d, 104.21.77.61 and 172.67.204.219.
Other host names, for instance stanfordfinancialclaims.com, soda77kian.com, mail.rambleontheisland.com, mail.tapchimythuat.vn and switzerlandtimes.com share IP numbers with codeforces.me.
Name Servers
Two name servers fred.ns.cloudflare.com and jean.ns.cloudflare.com handle delegation for codeforces.me.
codeforces.me uses the same name server setup as other domains, for example akjbookkeeping.com.au, 10ptt.com, monssl.fr, globalreparos.com.br and techcores.com.
codeforces.me partially shares name servers with other domains; examples include energoatom.com.ua, dghn.net, svn2ftp.com, pz1g56.rest and xfbiotech.com.
Host names with six IP numbers: fred.ns.cloudflare.com points to: 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; jean.ns.cloudflare.com points to: 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.