grade.app - robtex.com

grade.app

DNSSEC⚠️ Not signed
A2606:4700:130:436c:6f75:6466:6c61:7265🇺🇸 Cloudflare2606:4700:130::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US ⚠ Not in HTTPS hints
A172.64.80.1🇺🇸 Cloudflare172.64.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ⚠ Not in HTTPS hints
NScoraline.ns.cloudflare.com ⭐
A2606:4700:50::a29f:2658🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcoraline.ns.cloudflare.com
A2803:f800:50::6ca2:c258🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRcoraline.ns.cloudflare.com
A2a06:98c1:50::ac40:2258🇺🇸 Cloudflare2a06:98c1:50::/45
PTRcoraline.ns.cloudflare.com
A108.162.194.88🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcoraline.ns.cloudflare.com
A162.159.38.88Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcoraline.ns.cloudflare.com
A172.64.34.88🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcoraline.ns.cloudflare.com
NSmerlin.ns.cloudflare.com
A2606:4700:58::adf5:3bcd🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmerlin.ns.cloudflare.com
A2803:f800:50::6ca2:c1cd🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmerlin.ns.cloudflare.com
A2a06:98c1:50::ac40:21cd🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmerlin.ns.cloudflare.com
A108.162.193.205🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmerlin.ns.cloudflare.com
A172.64.33.205🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmerlin.ns.cloudflare.com
A173.245.59.205🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmerlin.ns.cloudflare.com
MXsmtp.google.com ⭐
A2607:f8b0:4023:c06::1a🇺🇸 Google2607:f8b0::/32
PTRdz-in-f26.1e100.net
A2607:f8b0:4023:c06::1b🇺🇸 Google2607:f8b0::/32
PTRdz-in-f27.1e100.net
A2607:f8b0:4023:c0b::1a🇺🇸 Google2607:f8b0::/32
PTRdd-in-f26.1e100.net
A2607:f8b0:4023:c0b::1b🇺🇸 Google2607:f8b0::/32
PTRdd-in-f27.1e100.net
A142.250.101.26🇺🇸 Google142.250.101.0/24
PTRdz-in-f26.1e100.net
A142.250.101.27🇺🇸 Google142.250.101.0/24
PTRdz-in-f27.1e100.net
A142.250.141.26🇺🇸 Google142.250.141.0/24
PTRdd-in-f26.1e100.net
A142.250.141.27🇺🇸 Google142.250.141.0/24
PTRdd-in-f27.1e100.net
A142.251.2.26🇺🇸 Google142.251.2.0/24
PTRdl-in-f26.1e100.net
MXw47dhjklemumr5wktmbjbdy7swucu2qlv6cc6gnlzidjbgbxhqma.mx-verification.google.com(15)
HTTPSHTTP/3, HTTP/2 ⚠ 2 unhinted📌 4 extra
IPv4104.21.79.137, 172.67.145.192
IPv62606:4700:3032::6815:4f89, 2606:4700:3034::ac43:91c0
SOAcoraline.ns.cloudflare.comdns@cloudflare.com serial=2398072106

app

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=101427
🔒 HSTS Preload (+subdomains)

Same first word

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grade.im
grade.eu
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Similar names

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derag.com
edgar.email
gedra.de
edgar.me
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gread.de
rdage.com
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greda.kz
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gerda.dk
gread.org
edgar.k12.il.us
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gerda.lublin.pl
edgar.hk

DNS History

10 records (6 active, 4 former)

NScoraline.ns.cloudflare.commerlin.ns.cloudflare.comMXsmtp.google.comw47dhjklemumr5wktmbjbdy7swucu2qlv6cc6gnlzidjbgbxhqma.mx-verification.google.comA172.64.80.12606:4700:130:436c:6f75:6466:6c61:7265104.21.79.137172.67.145.1922606:4700:3032::6815:4f892606:4700:3034::ac43:91c0
●NScoraline.ns.cloudflare.com2026-02-25 → 2026-03-22 · 2 obs
● 2026-02-25 09:03:12
● 2026-03-22 06:25:26
●NSmerlin.ns.cloudflare.com2026-02-25 → 2026-03-22 · 2 obs
● 2026-02-25 09:03:12
● 2026-03-22 06:25:26
●MXsmtp.google.com2026-02-25 → 2026-03-22 · 2 obs
● 2026-02-25 09:03:12
● 2026-03-22 06:25:26
●MXw47dhjklemumr5wktmbjbdy7swucu2qlv6cc6gnlzidjbgbxhqma.mx-verification.google.com2026-02-25 → 2026-03-22 · 2 obs
● 2026-02-25 09:03:12
● 2026-03-22 06:25:26
○A104.21.79.1372026-02-25 → 2026-03-20 · 6 obs
● 2026-02-25 09:03:12
● 2026-02-26 09:59:22
○ 2026-03-01 05:30:16
● 2026-03-20 16:51:48
○ 2026-03-22 06:25:24
○ 2026-03-22 06:25:26
●A172.64.80.12026-03-01 → 2026-03-22 · 5 obs
○ 2026-02-26 09:59:22
● 2026-03-01 05:30:16
○ 2026-03-20 16:51:48
● 2026-03-22 06:25:24
● 2026-03-22 06:25:26
○A172.67.145.1922026-02-25 → 2026-03-20 · 6 obs
● 2026-02-25 09:03:12
● 2026-02-26 09:59:22
○ 2026-03-01 05:30:16
● 2026-03-20 16:51:48
○ 2026-03-22 06:25:24
○ 2026-03-22 06:25:26
●A2606:4700:130:436c:6f75:6466:6c61:72652026-03-01 → 2026-03-22 · 5 obs
○ 2026-02-26 09:59:22
● 2026-03-01 05:30:16
○ 2026-03-20 16:51:48
● 2026-03-22 06:25:24
● 2026-03-22 06:25:26
○A2606:4700:3032::6815:4f892026-02-25 → 2026-03-20 · 6 obs
● 2026-02-25 09:03:12
● 2026-02-26 09:59:22
○ 2026-03-01 05:30:16
● 2026-03-20 16:51:48
○ 2026-03-22 06:25:24
○ 2026-03-22 06:25:26
○A2606:4700:3034::ac43:91c02026-02-25 → 2026-03-20 · 6 obs
● 2026-02-25 09:03:12
● 2026-02-26 09:59:22
○ 2026-03-01 05:30:16
● 2026-03-20 16:51:48
○ 2026-03-22 06:25:24
○ 2026-03-22 06:25:26

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
appns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com...-
grade.appcoraline.ns.cloudflare.com, merlin.ns.cloudflare.com-

✅ Authoritative Response

Server: 162.159.38.88

NS records: coraline.ns.cloudflare.com, merlin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for grade.app (unsigned zone)

⏱️ Timing

Total: 953ms | Queries: -

📄 Records

TypeCountSample Data
A1172.64.80.1
AAAA22606:4700:3034::ac43:91c0, 2606:4700:3032::6815:4f89
NS2coraline.ns.cloudflare.com, merlin.ns.cloudflare.com
MX2smtp.google.com (pri: 1), w47dhjklemumr5wktmbjbdy7swucu2qlv6cc6gnl
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1coraline.ns.cloudflare.com dns.cloudflar

Analysis

IP Addresses

grade.app resolves to two IP numbers: 2606:4700:130:436c:6f75:6466:6c61:7265 and 172.64.80.1.

Other host names, for instance nabx.net, webbeluga.com, dingerland.de, cvvmc.fr and dubinadomazlice.cz share IP numbers with grade.app.

Name Servers

grade.app has two name servers: coraline.ns.cloudflare.com and merlin.ns.cloudflare.com.

grade.app shares the same name server setup as other domains, for example stephenburkett.com, 3i4.pl, jacotei.com.br, refrigeracionale.com.ar and tgszsg.beer.

grade.app shares some name servers with other domains, for example sonystyle.it, everve.net, appaccount.com, freetradesmith.com and remont-98.ru.

These name servers are commonly used together with chan.ns.cloudflare.com and rocco.ns.cloudflare.com.

Host names with six IP numbers: coraline.ns.cloudflare.com points to: 2606:4700:50::a29f:2658, 2803:f800:50::6ca2:c258, 2a06:98c1:50::ac40:2258, 108.162.194.88, 162.159.38.88 and 172.64.34.88; merlin.ns.cloudflare.com points to: 2606:4700:58::adf5:3bcd, 2803:f800:50::6ca2:c1cd, 2a06:98c1:50::ac40:21cd, 108.162.193.205, 172.64.33.205 and 173.245.59.205.

Mail Servers

grade.app is served by two mail servers: smtp.google.com and w47dhjklemumr5wktmbjbdy7swucu2qlv6cc6gnlzidjbgbxhqma.mx-verification.google.com.

grade.app shares some mail servers with other domains, at least partially; for instance officewa.com, glassent.com, croc-roc.com, home-fi.com and gamingbro.com.

these mail servers are often used with aspmx.l.google.com, alt2.aspmx.l.google.com, alt1.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.

Host names with nine IP numbers: The host name smtp.google.com points to 2607:f8b0:4023:c06::1a, 2607:f8b0:4023:c06::1b, 2607:f8b0:4023:c0b::1a, 2607:f8b0:4023:c0b::1b, 142.250.101.26, 142.250.101.27, 142.250.141.26, 142.250.141.27 and 142.251.2.26.