`astra-facility.com`

DNSSEC	⚠️ Not signed
A	81.91.86.12^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`php53.web4u.cz`
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`mx1.mailchannels.net` ⭐
		A	54.69.1.140^{🇺🇸 Amazon54.68.0.0/15 EC2 PDX Prefix}
			PTR	`ec2-54-69-1-140.us-west-2.compute.amazonaws.com`
MX	`mx2.mailchannels.net` ⭐
		A	54.187.177.89^{🇺🇸 Amazon54.186.0.0/15 EC2 PDX prefix}
			PTR	`ec2-54-187-177-89.us-west-2.compute.amazonaws.com`
SOA	`ns.web4u.cz`admin@web4u.cz 2025-05-04 #0

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778843226

Subdomains

mail.astra-facility.com

Same first word

astra-facility.com

DNS History

6 records (5 active, 1 former)

●NSns.web4u.cz2015-08-08 → 2026-05-15 · 2 obs

● 2015-08-08 16:42:04
● 2026-05-15 11:27:02

●NSns2.web4u.cz2015-08-08 → 2026-05-15 · 2 obs

● 2015-08-08 16:42:04
● 2026-05-15 11:27:02

○MXmail.astra-facility.com2015-08-08 → 2017-04-02 · 4 obs

● 2015-08-08 16:42:04
● 2017-04-02 08:42:42
○ 2026-05-15 07:21:14
○ 2026-05-15 11:27:02

●MXmx1.mailchannels.net2026-05-15 → 2026-05-15 · 3 obs

○ 2017-04-02 08:42:42
● 2026-05-15 07:21:14
● 2026-05-15 11:27:02

●MXmx2.mailchannels.net2026-05-15 → 2026-05-15 · 3 obs

○ 2017-04-02 08:42:42
● 2026-05-15 07:21:14
● 2026-05-15 11:27:02

●A81.91.86.122015-08-08 → 2026-05-15 · 2 obs

● 2015-08-08 16:42:04
● 2026-05-15 11:27:02

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:85.207.53.12

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 996ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.86.12`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	2	`mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10)`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

Hierarchy

The parent of mail.astra-facility.com is astra-facility.com.

IP Addresses

astra-facility.com points to a single IP address: 81.91.86.12.

Other host names such as suasana.sk, vollmer.cz, belfleur.cz, powersystem.cz and proal.eu share IPs with astra-facility.com.

Name Servers

Two name servers ns2.web4u.cz and ns.web4u.cz handle the delegation for astra-facility.com.

astra-facility.com shares the same name server setup as other domains, for example tarpanext.com, hvbreal.eu, dorty-olomouc.com, kdomestriha.cz and bestforexbroker.eu.

Host names with two IP numbers:

ns2.web4u.cz points to 2a02:a40:100:28ff::12 and 85.207.53.12.

ns.web4u.cz points to 2001:1568:fd::241 and 185.14.224.241.

Mail Servers

Two mail servers handle astra-facility.com: mx1.mailchannels.net and mx2.mailchannels.net.

astra-facility.com shares the same mail server setup as other domains, including drbyte.com, tylershawmusic.com, nonstopshop.no, globalconsulteam.com and ritiriwaz.com.

Host names with one IP number:

mx1.mailchannels.net points to 54.69.1.140; mx2.mailchannels.net points to 54.187.177.89.

astra-facility.com - robtex.com