mail.stdev.su - dns.ninja

`mail.stdev.su`

DNSSEC	⚠️ Not signed
A	91.199.149.151^{🇷🇺 ADMAN-AS91.199.149.0/24 ADMAN-NET}
		PTR	`hosting.adman.cloud`
TXT	`v=spf1 include:_spf.timeweb.ru ~all`

`stdev.su`

	DNSSEC	⚠️ Not signed
	NS	`ns1.timeweb.ru` ⭐
	NS	`ns2.timeweb.ru`
	NS	`ns3.timeweb.org`
	NS	`ns4.timeweb.org`
	MX	`mail.stdev.su` ⭐
	TXT	`v=spf1 ip4:185.135.83.159 ip4:91.199.149.151 a mx ~all`
	TXT	`fk-verify=0440f4e055c37b4f3bc094db4587a022`
	SOA	`ns1.timeweb.ru`dns@timeweb.ru serial=496

📈 Tranco rank: #393,831

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stdev.su

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DNS History

1 record (1 active, 0 former)

●A91.199.149.1512026-04-28 → 2026-07-26 · 2 obs

● 2026-04-28 19:37:50
● 2026-07-26 10:32:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
su	a.dns.ripn.net, b.dns.ripn.net, d.dns.ripn.net, e.dns.ripn.net...	10 records
stdev.su	ns2.timeweb.ru, ns4.timeweb.org, ns1.timeweb.ru, ns3.timeweb.org	-

✅ Authoritative Response

Server:139.45.249.139

NS records: ns2.timeweb.ru, ns4.timeweb.org, ns1.timeweb.ru, ns3.timeweb.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stdev.su (unsigned zone)

⏱️ Timing

Total: 1246ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.199.149.151`
TXT	1	`v=spf1 include:_spf.timeweb.ru ~all`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (a.dns.ripn.net, a.dns.ripn.net, b.dns.ripn.net...)

Analysis

Mail Server Role

Mail for stdev.su is routed through the mail server mail.stdev.su.

IP Addresses

mail.stdev.su has exactly one IP address — 91.199.149.151.

mail.teachtalk.com, aviasels.ru, domkultury.ru plus two other host names have IP numbers in common with mail.stdev.su.