open51.io - robtex.com

open51.io

DNSSEC⚠️ Not signed
A2606:4700:3034::ac43:dd77🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:2b44🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.43.68Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.221.119🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSelliot.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3ba2🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelliot.ns.cloudflare.com
A2803:f800:50::6ca2:c1a2🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRelliot.ns.cloudflare.com
A2a06:98c1:50::ac40:21a2🇺🇸 Cloudflare2a06:98c1:50::/45
PTRelliot.ns.cloudflare.com
A108.162.193.162🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelliot.ns.cloudflare.com
A172.64.33.162🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelliot.ns.cloudflare.com
A173.245.59.162🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRelliot.ns.cloudflare.com
NSwren.ns.cloudflare.com
A2606:4700:50::a29f:268d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwren.ns.cloudflare.com
A2803:f800:50::6ca2:c28d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRwren.ns.cloudflare.com
A2a06:98c1:50::ac40:228d🇺🇸 Cloudflare2a06:98c1:50::/45
PTRwren.ns.cloudflare.com
A108.162.194.141🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwren.ns.cloudflare.com
A162.159.38.141Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwren.ns.cloudflare.com
A172.64.34.141🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwren.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.43.68, 172.67.221.119
IPv6 hints2606:4700:3034::ac43:dd77, 2606:4700:3036::6815:2b44
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=193, name=cloudflare-ech.com
SOAelliot.ns.cloudflare.comdns@cloudflare.com serial=2400667279

io

DNSSEC🔒 Signed (DS record present)
NSa0.nic.io ⭐
NSa2.nic.io
NSb0.nic.io
NSc0.nic.io
SOAa0.nic.iohostmaster@donuts.email serial=1778613830

Same first word

open51.io
open51.org

Similar names

51open.com

DNS History

10 records (6 active, 4 former)

NSelliot.ns.cloudflare.comwren.ns.cloudflare.comA104.21.43.68172.67.221.1192606:4700:3034::ac43:dd772606:4700:3036::6815:2b44188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSelliot.ns.cloudflare.com2026-04-04 → 2026-05-12 · 2 obs
● 2026-04-04 09:16:12
● 2026-05-12 19:51:04
●NSwren.ns.cloudflare.com2026-04-04 → 2026-05-12 · 2 obs
● 2026-04-04 09:16:12
● 2026-05-12 19:51:04
●A104.21.43.682026-04-04 → 2026-05-12 · 5 obs
● 2026-04-04 09:16:12
● 2026-04-30 11:09:44
○ 2026-05-01 23:37:04
● 2026-05-07 01:09:54
● 2026-05-12 19:51:04
●A172.67.221.1192026-04-04 → 2026-05-12 · 5 obs
● 2026-04-04 09:16:12
● 2026-04-30 11:09:44
○ 2026-05-01 23:37:04
● 2026-05-07 01:09:54
● 2026-05-12 19:51:04
○A188.114.96.02026-05-01 → 2026-05-01 · 4 obs
○ 2026-04-30 11:09:44
● 2026-05-01 23:37:04
○ 2026-05-07 01:09:54
○ 2026-05-12 19:51:04
○A188.114.97.02026-05-01 → 2026-05-01 · 4 obs
○ 2026-04-30 11:09:44
● 2026-05-01 23:37:04
○ 2026-05-07 01:09:54
○ 2026-05-12 19:51:04
●A2606:4700:3034::ac43:dd772026-04-04 → 2026-05-12 · 5 obs
● 2026-04-04 09:16:12
● 2026-04-30 11:09:44
○ 2026-05-01 23:37:04
● 2026-05-07 01:09:54
● 2026-05-12 19:51:04
●A2606:4700:3036::6815:2b442026-04-04 → 2026-05-12 · 5 obs
● 2026-04-04 09:16:12
● 2026-04-30 11:09:44
○ 2026-05-01 23:37:04
● 2026-05-07 01:09:54
● 2026-05-12 19:51:04
○A2a06:98c1:3120::2026-05-01 → 2026-05-01 · 4 obs
○ 2026-04-30 11:09:44
● 2026-05-01 23:37:04
○ 2026-05-07 01:09:54
○ 2026-05-12 19:51:04
○A2a06:98c1:3121::2026-05-01 → 2026-05-01 · 4 obs
○ 2026-04-30 11:09:44
● 2026-05-01 23:37:04
○ 2026-05-07 01:09:54
○ 2026-05-12 19:51:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ioa0.nic.io, c0.nic.io, b0.nic.io, a2.nic.io-
open51.ioelliot.ns.cloudflare.com, wren.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.38.141

NS records: elliot.ns.cloudflare.com, wren.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for open51.io (unsigned zone)

⏱️ Timing

Total: 1493ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.221.119, 104.21.43.68
AAAA22606:4700:3034::ac43:dd77, 2606:4700:3036::6815:2b44
NS2elliot.ns.cloudflare.com, wren.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1elliot.ns.cloudflare.com dns.cloudflare.

Analysis

IP Addresses

open51.io resolves to four IPs: 2606:4700:3034::ac43:dd77, 2606:4700:3036::6815:2b44, 104.21.43.68 and 172.67.221.119.

Other host names, for instance sirisoft.com, revenue.payfkv.cc, pmas.info, xsportv-e8a814d58e.xyz and alva.cash share IP numbers with open51.io.

Name Servers

open51.io has two name servers: elliot.ns.cloudflare.com and wren.ns.cloudflare.com.

open51.io shares the same name server setup as other domains, for example creativetax.io, locha.io, ivencia.com, crypto-sports.io and unlock24h.com.

open51.io shares some name servers with other domains, for example ledgerlive-security.app, tecval.com.br, coreykelsey.com, flowreversal.com and 360hub.club.

These name servers are commonly used together with magnolia.ns.cloudflare.com and jo.ns.cloudflare.com.

Host names with six IP numbers: elliot.ns.cloudflare.com points to: 2606:4700:58::adf5:3ba2, 2803:f800:50::6ca2:c1a2, 2a06:98c1:50::ac40:21a2, 108.162.193.162, 172.64.33.162 and 173.245.59.162; wren.ns.cloudflare.com points to: 2606:4700:50::a29f:268d, 2803:f800:50::6ca2:c28d, 2a06:98c1:50::ac40:228d, 108.162.194.141, 162.159.38.141 and 172.64.34.141.