mail.postclass.ru - robtex.com

mail.postclass.ru

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:862d🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:614🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.6.20Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.134.45🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.6.20, 172.67.134.45
IPv62606:4700:3032::ac43:862d, 2606:4700:3034::6815:614

postclass.ru

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:862d🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:614🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.6.20Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.134.45🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbarbara.ns.cloudflare.com ⭐
NSnorm.ns.cloudflare.com
MX_dc-mx.abf1028bd3d9.postclass.ru ⭐
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.6.20, 172.67.134.45
IPv62606:4700:3032::ac43:862d, 2606:4700:3034::6815:614
SOAbarbara.ns.cloudflare.comdns@cloudflare.com serial=2399907338

Previously MX for

postclass.ru

Same first word

mail.cutegirl.jp
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DNS History

9 records (4 active, 5 former)

2017201820192020202120222023202420252026A104.21.6.20172.67.134.452606:4700:3032::ac43:862d2606:4700:3034::6815:614104.28.0.99104.28.1.992400:cb00:2048:1::681c:1632400:cb00:2048:1::681c:6346.17.46.46
●A104.21.6.202026-02-22 → 2026-03-27 · 3 obs
○ 2017-05-27 23:01:56
● 2026-02-22 22:39:28
● 2026-03-27 09:51:12
○A104.28.0.992017-05-27 → 2017-05-27 · 4 obs
○ 2016-10-03 08:41:18
● 2017-05-27 23:01:56
○ 2026-02-22 22:39:28
○ 2026-03-27 09:51:12
○A104.28.1.992017-05-27 → 2017-05-27 · 4 obs
○ 2016-10-03 08:41:18
● 2017-05-27 23:01:56
○ 2026-02-22 22:39:28
○ 2026-03-27 09:51:12
●A172.67.134.452026-02-22 → 2026-03-27 · 3 obs
○ 2017-05-27 23:01:56
● 2026-02-22 22:39:28
● 2026-03-27 09:51:12
○A2400:cb00:2048:1::681c:1632017-05-27 → 2017-05-27 · 4 obs
○ 2016-10-03 08:41:18
● 2017-05-27 23:01:56
○ 2026-02-22 22:39:28
○ 2026-03-27 09:51:12
○A2400:cb00:2048:1::681c:632017-05-27 → 2017-05-27 · 4 obs
○ 2016-10-03 08:41:18
● 2017-05-27 23:01:56
○ 2026-02-22 22:39:28
○ 2026-03-27 09:51:12
●A2606:4700:3032::ac43:862d2026-02-22 → 2026-03-27 · 3 obs
○ 2017-05-27 23:01:56
● 2026-02-22 22:39:28
● 2026-03-27 09:51:12
●A2606:4700:3034::6815:6142026-02-22 → 2026-03-27 · 3 obs
○ 2017-05-27 23:01:56
● 2026-02-22 22:39:28
● 2026-03-27 09:51:12
○A46.17.46.462016-10-03 → 2016-10-03 · 3 obs
● 2016-10-03 08:41:18
○ 2017-05-27 23:01:56
○ 2026-03-27 09:51:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
rua.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...-
postclass.rubarbara.ns.cloudflare.com, norm.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.248

NS records: barbara.ns.cloudflare.com, norm.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for postclass.ru (unsigned zone)

⏱️ Timing

Total: 818ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.6.20, 172.67.134.45
AAAA22606:4700:3034::6815:614, 2606:4700:3032::ac43:862d
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.postclass.ru points to four IP numbers: 2606:4700:3032::ac43:862d, 2606:4700:3034::6815:614, 104.21.6.20 and 172.67.134.45.

Other host names including tinklapiukurimas.eu, gf-ynd-quickq.com.cn, frogsjeans.space, celebshort.com and 456632.cn share IP numbers with mail.postclass.ru.