open4school.com.br - robtex.com

open4school.com.br

DNSSEC🔒 Signed (DS record present)
A2606:4700:3031::6815:3b5f🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:aebe🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.59.95Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.174.190🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSarvind.ns.cloudflare.com ⭐
A2606:4700:58::a29f:2ce3🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarvind.ns.cloudflare.com
A2803:f800:50::6ca2:c3e3🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRarvind.ns.cloudflare.com
A2a06:98c1:50::ac40:23e3🇺🇸 Cloudflare2a06:98c1:50::/45
PTRarvind.ns.cloudflare.com
A108.162.195.227🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarvind.ns.cloudflare.com
A162.159.44.227Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarvind.ns.cloudflare.com
A172.64.35.227🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRarvind.ns.cloudflare.com
NSrosa.ns.cloudflare.com
A2606:4700:50::adf5:3ae4🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrosa.ns.cloudflare.com
A2803:f800:50::6ca2:c0e4🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrosa.ns.cloudflare.com
A2a06:98c1:50::ac40:20e4🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrosa.ns.cloudflare.com
A108.162.192.228🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrosa.ns.cloudflare.com
A172.64.32.228🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrosa.ns.cloudflare.com
A173.245.58.228🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrosa.ns.cloudflare.com
MXaspmx.l.google.com ⭐
A2a00:1450:4009:c0f::1b🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f27.1e100.net
A172.217.76.26🇺🇸 Google172.217.76.0/24
PTRyulhrp-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2800:3f0:4003:c0f::1b🇨🇱 Google2800:3f0:4003::/48
A108.177.123.26🇺🇸 Google108.177.123.0/24
PTRlcscld-in-f26.1e100.net
MXalt2.aspmx.l.google.com(5)
A2a00:1450:400b:c02::1a🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f26.1e100.net
A172.253.116.26🇺🇸 Google172.253.116.0/24
PTRdj-in-f26.1e100.net
MXalt3.aspmx.l.google.com(10)
A2a00:1450:4009:c0f::1a🇬🇧 Google2a00:1450:4009::/48
PTRyulhrs-in-f26.1e100.net
A192.178.223.27🇺🇸 Google192.178.223.0/24
PTRyulhrs-in-f27.1e100.net
MXalt4.aspmx.l.google.com(10)
A2a00:1450:400c:c00::1b🇧🇪 Google2a00:1450:400c::/48
PTRws-in-f27.1e100.net
PTRws-in-x1b.1e100.net
A173.194.76.27🇺🇸 Google173.194.76.0/24
PTRws-in-f27.1e100.net
TXTfacebook-domain-verification=d6170r5b317w61fa66v9jcmzpnv8bb
TXTgoogle-site-verification=tbzAEnUybDpyLuHqIQafeiXbm81RlPuMvTYZS0KRaIo
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.59.95, 172.67.174.190
IPv6 hints2606:4700:3031::6815:3b5f, 2606:4700:3033::ac43:aebe
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=42, name=cloudflare-ech.com
SOAarvind.ns.cloudflare.comdns@cloudflare.com serial=2400982030

com.br

DNSSEC⚠️ Not signed
NSa.dns.br ⭐ ⚠️ Not in parent delegation
NSb.dns.br ⚠️ Not in parent delegation
NSc.dns.br ⚠️ Not in parent delegation
NSd.dns.br ⚠️ Not in parent delegation
NSe.dns.br ⚠️ Not in parent delegation
NSf.dns.br ⚠️ Not in parent delegation
SOAa.dns.brhostmaster@registro.br serial=2026105018
📈 Tranco rank: #746,144
rank #549016 globally
rank #4052 in the tld
WOT: SAFE (69/100)

Same first word

open4school.com.br

DNS History

11 records (11 active, 0 former)

NSarvind.ns.cloudflare.comrosa.ns.cloudflare.comMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comaspmx.l.google.comA104.21.59.95172.67.174.1902606:4700:3031::6815:3b5f2606:4700:3033::ac43:aebe
●NSarvind.ns.cloudflare.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●NSrosa.ns.cloudflare.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●MXalt1.aspmx.l.google.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●MXalt2.aspmx.l.google.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●MXalt3.aspmx.l.google.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●MXalt4.aspmx.l.google.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●MXaspmx.l.google.com2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●A104.21.59.952026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●A172.67.174.1902026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●A2606:4700:3031::6815:3b5f2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00
●A2606:4700:3033::ac43:aebe2026-03-07 → 2026-04-15 · 2 obs
● 2026-03-07 01:20:18
● 2026-04-15 01:03:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
bra.dns.br, b.dns.br, c.dns.br, d.dns.br...-
open4school.com.brarvind.ns.cloudflare.com, rosa.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.227

NS records: arvind.ns.cloudflare.com, rosa.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 901ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.59.95, 172.67.174.190
AAAA22606:4700:3031::6815:3b5f, 2606:4700:3033::ac43:aebe
NS2arvind.ns.cloudflare.com, rosa.ns.cloudflare.com
MX5aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...
TXT2facebook-domain-verification=d6170r5b317, google-site-verification=tbzAEnUybDpyLuH
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1arvind.ns.cloudflare.com dns.cloudflare.

Analysis

IP Addresses

open4school.com.br maps to four IP numbers: 2606:4700:3031::6815:3b5f, 2606:4700:3033::ac43:aebe, 104.21.59.95 and 172.67.174.190.

Other host names, for instance disdikmahakamulu.com, gqjkxyt.doedap216.shop, dudu8.cc, hiloraventine.com and mineralgrafics.com share IP numbers with open4school.com.br.

Name Servers

Two name servers arvind.ns.cloudflare.com and rosa.ns.cloudflare.com handle delegation for open4school.com.br.

open4school.com.br uses the same name server setup as other domains, for example qqdute.cn, v534.cn, lakepartners.com, frinet.cn and hamna.cn.

open4school.com.br partially shares name servers with other domains; examples include kinitoto.it.com, chabadhk.org, cssplus.org, terjun4dvip19.site and a1nk.ru.

These name servers are commonly used with the name servers darl.ns.cloudflare.com, zelda.ns.cloudflare.com, gail.ns.cloudflare.com, meadow.ns.cloudflare.com and raina.ns.cloudflare.com.

Host names with six IP numbers: arvind.ns.cloudflare.com points to: 2606:4700:58::a29f:2ce3, 2803:f800:50::6ca2:c3e3, 2a06:98c1:50::ac40:23e3, 108.162.195.227, 162.159.44.227 and 172.64.35.227; rosa.ns.cloudflare.com points to: 2606:4700:50::adf5:3ae4, 2803:f800:50::6ca2:c0e4, 2a06:98c1:50::ac40:20e4, 108.162.192.228, 172.64.32.228 and 173.245.58.228.

Mail Servers

Five mail servers handle open4school.com.br: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

open4school.com.br shares some mail servers with other domains, at least partially, such as st33p.com, ns500758.ns500759.ns500759.ns500758.ns500758.ns500758.ns500698.ns500735.ns500735.ns500698.ns500735.ns500708.ns500576.ns500708.ns500686.ns500652.ns500652.trackreceptor.com, ns500754.ns500671.ns500754.ns500754.ns500742.ns500731.ns500671.ns500731.ns500649.ns500649.ns500666.ns500291.ns500291.ns500131.lustychickser.com, ns500671.ns500671.ns500731.ns500671.ns500704.ns500705.ns500671.ns500678.ns500688.ns500291.ns500671.ns500666.ns500153.tenderladiesbz.com and termiteguys.com.au.

These mail servers are often used together with aspmx2.googlemail.com and aspmx3.googlemail.com.

Host names with two IP numbers:

aspmx.l.google.com points to: 2a00:1450:4009:c0f::1b and 172.217.76.26

alt1.aspmx.l.google.com points to: 2800:3f0:4003:c0f::1b and 108.177.123.26

alt2.aspmx.l.google.com points to: 2a00:1450:400b:c02::1a and 172.253.116.26

alt3.aspmx.l.google.com points to: 2a00:1450:4009:c0f::1a and 192.178.223.27

alt4.aspmx.l.google.com points to: 2a00:1450:400c:c00::1b and 173.194.76.27