`mail.astra-facility.com`

DNSSEC	⚠️ Not signed
A	81.91.87.10^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`mail.web4u.cz`

`astra-facility.com`

	DNSSEC	⚠️ Not signed
	A	81.91.86.12^{🇨🇿 WEB4U81.91.80.0/21}
	NS	`ns2.web4u.cz` ⭐
	NS	`ns.web4u.cz`
	MX	`mx1.mailchannels.net` ⭐
	MX	`mx2.mailchannels.net` ⭐
	SOA	`ns.web4u.cz`admin@web4u.cz 2025-05-04 #0

Same first word

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DNS History

1 record (1 active, 0 former)

●A81.91.87.102015-08-09 → 2026-05-15 · 2 obs

● 2015-08-09 18:46:08
● 2026-05-15 07:21:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, c.gtld-servers.net, i.gtld-servers.net, d.gtld-servers.net...	-
astra-facility.com	ns.web4u.cz, ns2.web4u.cz	-

✅ Authoritative Response

Server:185.14.224.241

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for astra-facility.com (unsigned zone)

⏱️ Timing

Total: 1666ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.87.10`

Analysis

IP Addresses

mail.astra-facility.com points to IP number 81.91.87.10.

For instance, other host names mail.lajtkep.cz, mail.myriady.com, mail.barp.cz, mail.modrava.info and mail.vysocky.cz share IP numbers with mail.astra-facility.com.

mail.astra-facility.com - robtex.com