`mx17.cbm.rt.ru`

DNSSEC	⚠️ Not signed
A	5.143.239.136^{🇷🇺 ROSTELECOM-AS5.143.224.0/19 ROSTELECOM NETS}
		PTR	`mx17.cbm.rt.ru`

PTR for

136.239.143.5.in-addr.arpa

MX for

azbukainterneta.ru

cbm.rt.ru

wink.rt.ru

smi.rt.ru

Previously MX for

info.rt.ru

lc.rt.ru

Same first word

mx17.cn

mx17.info

mx17.fr

mx17.net

Similar names

mx71.net

17mx.net

m17x.com

17mx.com

71mx.com

17xm.com

17mx.org

m1x7.vip

xm17.net

DNS History

1 record (1 active, 0 former)

●A5.143.239.1362017-02-12 → 2026-05-15 · 14 obs

● 2017-02-12 06:47:46
● 2026-02-19 03:45:58
○ 2026-02-19 15:14:50
● 2026-02-22 06:58:16
● 2026-03-10 00:42:26
○ 2026-03-22 18:01:56
● 2026-03-24 06:20:14
● 2026-04-03 16:14:10
○ 2026-04-04 12:37:58
● 2026-04-08 16:16:38
● 2026-04-29 04:23:46
○ 2026-04-29 05:21:02
● 2026-04-29 21:19:00
● 2026-05-15 08:29:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ru	a.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...	-
rt.ru	ns2.rostelecom.ru, ns8-cloud.nic.ru, ns1.rostelecom.ru, ns4-cloud.nic.ru...	20 records
cbm.rt.ru	ns1.rostelecom.ru, ns2.rostelecom.ru	-

✅ Authoritative Response

Server:87.226.162.62

NS records: ns1.rostelecom.ru, ns2.rostelecom.ru

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rt.ru (unsigned zone)

⏱️ Timing

Total: 3100ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`5.143.239.136`

📌 Glue Records Collected

Total: 20

Out-of-bailiwick: 20 (ns8-cloud.nic.ru, ns8-cloud.nic.ru, ns8-cloud.nic.ru...)

Analysis

Mail Server Role

mx17.cbm.rt.ru serves as a mail server for azbukainterneta.ru, cbm.rt.ru, wink.rt.ru and smi.rt.ru.

mx10.cbm.rt.ru, mx11.cbm.rt.ru and mx12.cbm.rt.ru are commonly used as mail servers in conjunction with mx17.cbm.rt.ru.

IP Addresses

mx17.cbm.rt.ru maps to IP address 5.143.239.136.

Other host names, for example, mx17.data.rt.ru share IP numbers with mx17.cbm.rt.ru.

	DNSSEC	⚠️ Not signed
	NS	`ns1.rostelecom.ru` ⭐
	NS	`ns2.rostelecom.ru`
	MX	`mx1.cbm.rt.ru` ⭐
	MX	`mx10.cbm.rt.ru` ⭐
	MX	`mx11.cbm.rt.ru` ⭐
	MX	`mx12.cbm.rt.ru` ⭐
	MX	`mx13.cbm.rt.ru` ⭐
	MX	`mx14.cbm.rt.ru` ⭐
	MX	`mx15.cbm.rt.ru` ⭐
	MX	`mx16.cbm.rt.ru` ⭐
	MX	`mx17.cbm.rt.ru` ⭐
	MX	`mx18.cbm.rt.ru` ⭐
	MX	`mx2.cbm.rt.ru` ⭐
	MX	`mx3.cbm.rt.ru` ⭐
	MX	`mx4.cbm.rt.ru` ⭐
	MX	`mx5.cbm.rt.ru` ⭐
	MX	`mx6.cbm.rt.ru` ⭐
	MX	`mx7.cbm.rt.ru` ⭐
	MX	`mx8.cbm.rt.ru` ⭐
	MX	`mx9.cbm.rt.ru` ⭐
	TXT	`mailru-verification: 4d10c5fa77fc4c56`
	TXT	`google-site-verification=d40BYX0hTdsyGAE4nHeX1XLZzahWPx0Oz0N8Z54jOUc`
	TXT	`v=spf2.0/pra ip4:5.143.239.136 ip4:46.61.152.148 ip4:46.61.170.128 ip4:46.61....`
	TXT	`v=spf1 ip4:5.143.239.136 ip4:46.61.152.148 ip4:46.61.170.128 ip4:46.61.217.18...`
	SOA	`ns1.rostelecom.ru`for@rt.ru 2018-04-25 #1

mx17.cbm.rt.ru - robtex.com