postclass.ru - dns.ninja

`postclass.ru`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:862d^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:614^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.6.20^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.134.45^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`barbara.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3af8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`barbara.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`barbara.ns.cloudflare.com`
		A	108.162.192.248^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	172.64.32.248^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
		A	173.245.58.248^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`barbara.ns.cloudflare.com`
NS	`norm.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b86^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`norm.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c186^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`norm.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2186^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`norm.ns.cloudflare.com`
		A	108.162.193.134^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`norm.ns.cloudflare.com`
		A	172.64.33.134^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`norm.ns.cloudflare.com`
		A	173.245.59.134^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`norm.ns.cloudflare.com`
MX	`_dc-mx.abf1028bd3d9.postclass.ru` ⭐
		A	185.22.155.77^{🇷🇺 ASBAXET185.22.155.0/24}
			PTR	`ha004.justhost.ru`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.6.20, 172.67.134.45
		IPv6 hints	2606:4700:3032::ac43:862d, 2606:4700:3034::6815:614
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=64, name=cloudflare-ech.com
SOA	`barbara.ns.cloudflare.com`dns@cloudflare.com serial=2405007066

`ru`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.ripn.net` ⭐
	NS	`b.dns.ripn.net`
	NS	`d.dns.ripn.net`
	NS	`e.dns.ripn.net`
	NS	`f.dns.ripn.net`
	SOA	`a.dns.ripn.net`hostmaster@ripn.net serial=4069327

Subdomains

abf1028bd3d9.postclass.ru

mail.postclass.ru

Same first word

postclass.ru

Similar names

spotclass.com

DNS History

23 records (7 active, 16 former)

●NSbarbara.ns.cloudflare.com2016-10-03 → 2026-06-20 · 5 obs

● 2016-10-03 08:41:16
● 2026-04-29 13:15:02
○ 2026-05-10 09:05:52
● 2026-05-22 13:16:08
● 2026-06-20 19:41:44

●NSnorm.ns.cloudflare.com2016-10-03 → 2026-06-20 · 5 obs

● 2016-10-03 08:41:16
● 2026-04-29 13:15:02
○ 2026-05-10 09:05:52
● 2026-05-22 13:16:08
● 2026-06-20 19:41:44

○NSns1.expired.reg.ru2026-05-10 → 2026-05-10 · 4 obs

○ 2026-04-29 13:15:02
● 2026-05-10 09:05:52
○ 2026-05-22 13:16:08
○ 2026-06-20 19:41:44

○NSns2.expired.reg.ru2026-05-10 → 2026-05-10 · 4 obs

○ 2026-04-29 13:15:02
● 2026-05-10 09:05:52
○ 2026-05-22 13:16:08
○ 2026-06-20 19:41:44

●MX_dc-mx.abf1028bd3d9.postclass.ru2026-02-15 → 2026-06-20 · 6 obs

○ 2020-06-01 11:32:48
● 2026-02-15 17:31:36
● 2026-04-29 13:15:02
○ 2026-05-10 09:05:52
● 2026-05-22 13:16:08
● 2026-06-20 19:41:44

○MXdc-7d0a21d9d804.postclass.ru2019-06-19 → 2020-06-01 · 5 obs

○ 2017-02-01 14:40:54
● 2019-06-19 12:12:26
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
○ 2026-06-20 19:41:44

○MXmail.postclass.ru2016-10-03 → 2017-02-01 · 4 obs

● 2016-10-03 08:41:16
● 2017-02-01 14:40:54
○ 2019-06-19 12:12:26
○ 2026-06-20 19:41:44

●A104.21.6.202026-02-18 → 2026-06-20 · 12 obs

○ 2026-02-15 17:31:36
● 2026-02-18 20:49:08
● 2026-04-05 02:58:00
○ 2026-04-16 13:19:40
● 2026-04-24 18:42:56
● 2026-04-29 13:15:02
○ 2026-05-10 09:05:52
● 2026-05-22 13:16:08
● 2026-05-29 13:04:40
○ 2026-05-31 07:08:10
● 2026-06-05 09:38:12
● 2026-06-20 19:41:44

○A104.28.0.992016-10-03 → 2020-06-01 · 4 obs

● 2016-10-03 08:41:16
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
○ 2026-06-20 19:41:44

○A104.28.1.992016-10-03 → 2020-06-01 · 4 obs

● 2016-10-03 08:41:16
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
○ 2026-06-20 19:41:44

●A172.67.134.452020-06-01 → 2026-06-20 · 14 obs

○ 2019-06-19 12:12:26
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
● 2026-02-18 20:49:08
● 2026-04-05 02:58:00
○ 2026-04-16 13:19:40
● 2026-04-24 18:42:56
● 2026-04-29 13:15:02
○ 2026-05-10 09:05:52
● 2026-05-22 13:16:08
● 2026-05-29 13:04:40
○ 2026-05-31 07:08:10
● 2026-06-05 09:38:12
● 2026-06-20 19:41:44

○A188.114.96.02026-02-15 → 2026-05-31 · 10 obs

○ 2020-06-01 11:32:48
● 2026-02-15 17:31:36
○ 2026-02-18 20:49:08
○ 2026-04-05 02:58:00
● 2026-04-16 13:19:40
○ 2026-04-24 18:42:56
○ 2026-05-29 13:04:40
● 2026-05-31 07:08:10
○ 2026-06-05 09:38:12
○ 2026-06-20 19:41:44

○A188.114.97.02026-02-15 → 2026-05-31 · 10 obs

○A2400:cb00:2048:1::681c:1632017-01-24 → 2017-02-01 · 5 obs

○ 2016-10-03 08:41:16
● 2017-01-24 13:25:00
● 2017-02-01 14:40:54
○ 2019-06-19 12:12:26
○ 2026-06-20 19:41:44

○A2400:cb00:2048:1::681c:632017-01-24 → 2017-02-01 · 5 obs

○ 2016-10-03 08:41:16
● 2017-01-24 13:25:00
● 2017-02-01 14:40:54
○ 2019-06-19 12:12:26
○ 2026-06-20 19:41:44

○A2606:4700:30::681c:1632019-06-19 → 2019-06-19 · 4 obs

○ 2017-02-01 14:40:54
● 2019-06-19 12:12:26
○ 2020-06-01 11:32:48
○ 2026-06-20 19:41:44

○A2606:4700:30::681c:632019-06-19 → 2019-06-19 · 4 obs

○ 2017-02-01 14:40:54
● 2019-06-19 12:12:26
○ 2020-06-01 11:32:48
○ 2026-06-20 19:41:44

○A2606:4700:3031::681c:1632020-06-01 → 2020-06-01 · 4 obs

○ 2019-06-19 12:12:26
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
○ 2026-06-20 19:41:44

●A2606:4700:3032::ac43:862d2020-06-01 → 2026-06-20 · 14 obs

●A2606:4700:3034::6815:6142026-02-18 → 2026-06-20 · 12 obs

○A2606:4700:3037::681c:632020-06-01 → 2020-06-01 · 4 obs

○ 2019-06-19 12:12:26
● 2020-06-01 11:32:48
○ 2026-02-15 17:31:36
○ 2026-06-20 19:41:44

○A2a06:98c1:3120::2026-02-15 → 2026-05-31 · 10 obs

○A2a06:98c1:3121::2026-02-15 → 2026-05-31 · 10 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ru	d.dns.ripn.net, b.dns.ripn.net, a.dns.ripn.net, e.dns.ripn.net...	-
postclass.ru	norm.ns.cloudflare.com, barbara.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.248

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for postclass.ru (unsigned zone)

⏱️ Timing

Total: 1251ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.6.20, 172.67.134.45`
AAAA	2	`2606:4700:3034::6815:614, 2606:4700:3032::ac43:862d`
NS	2	`barbara.ns.cloudflare.com, norm.ns.cloudflare.com`
MX	1	`_dc-mx.abf1028bd3d9.postclass.ru (pri: 1`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`barbara.ns.cloudflare.com dns.cloudflare`

Analysis

Hierarchy

abf1028bd3d9.postclass.ru and mail.postclass.ru each fall under postclass.ru as their parent domain.

IP Addresses

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

Two other host names, along with costello.cloud, prosiso.com and alabsolitaire.com, also share IP numbers with postclass.ru.

Name Servers

postclass.ru is delegated to two name servers: barbara.ns.cloudflare.com and norm.ns.cloudflare.com.

postclass.ru shares its NS records with other domains, for example glasgowsalsa.com, acesigns.ie, minilib.ru and two others.

postclass.ru partially shares its NS delegation with several other domains, including galaxypc247.com, darkmex.com, llumar369.com and two others.

These name servers are regularly seen alongside trevor.ns.cloudflare.com and lady.ns.cloudflare.com as name servers.

DNS names with 6 IP addresses:

barbara.ns.cloudflare.com resolves to 108.162.192.248, 172.64.32.248, 173.245.58.248 and 3 other IP addresses.

norm.ns.cloudflare.com resolves to 108.162.193.134, 172.64.33.134, 173.245.59.134 and 3 other IP addresses.

Mail Servers

The sole mail server for postclass.ru is _dc-mx.abf1028bd3d9.postclass.ru.

_dc-mx.abf1028bd3d9.postclass.ru resolves to a single IP number: 185.22.155.77.