`mx40.bieringer.de`

CNAME	`co2.bieringer.net`
DNSSEC	⚠️ Not signed
A	2a02:c206:3012:2939::1^{🇩🇪 CONTABO2a02:c206::/32}
		PTR	`co2.bieringer.net`
A	158.220.124.161^{🇩🇪 CONTABO158.220.112.0/20}
MX	`co2.bieringer.net` ⭐
		A	2a02:c206:3012:2939::1^{🇩🇪 CONTABO2a02:c206::/32}
			PTR	`co2.bieringer.net`
		A	158.220.124.161^{🇩🇪 CONTABO158.220.112.0/20}
			PTR	`co2.bieringer.net`
TXT	`v=spf1 ip4:158.220.124.161 ip6:2a02:c206:3012:2939::1 mx -all`

`bieringer.de`

	DNSSEC	⚠️ Not signed
	NS	`ns1.first-ns.de` ⭐
	NS	`robotns2.second-ns.de`
	NS	`robotns3.second-ns.com`
	MX	`co2.bieringer.net` ⭐
	TXT	`v=spf1 ip4:5.189.185.206 ip6:2a02:c207:3005:9207::1 ip4:158.220.124.161 ip6:2...`
	SOA	`ns1.first-ns.de`hostmaster@bieringer.de 2026-04-23 #14

WOT: SAFE (60/100)
rank #564649 globally
rank #19418 in the tld
WOT: SAFE (62/100)

MX for

bieringer.org

Same first word

mx40.co.za

mx40.org

Similar names

04xm.com

mx04.kinghost.net

04mx.com

mx04.com

xm40.com

DNS History

1 record (1 active, 0 former)

●CNAMEco2.bieringer.net2026-03-29 → 2026-04-26 · 2 obs

● 2026-03-29 14:46:34
● 2026-04-26 08:54:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
bieringer.de	robotns3.second-ns.com, robotns2.second-ns.de, ns1.first-ns.de	-

✅ Authoritative Response

Server:213.239.242.238

NS records: robotns3.second-ns.com, robotns2.second-ns.de, ns1.first-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bieringer.de (unsigned zone)

⏱️ Timing

Total: 1246ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`co2.bieringer.net`

Analysis

Mail Server Role

The mail server for bieringer.org is mx40.bieringer.de.

For mail handling, mx20.bieringer.de serves as a mail server together with mx40.bieringer.de.

IP Addresses

mx40.bieringer.de points to two IP numbers: 2a02:c206:3012:2939::1 and 158.220.124.161.

Other host names, for instance co2.bieringer.net, share IP numbers with mx40.bieringer.de.

Mail Servers

mx40.bieringer.de is handled by a single mail server, co2.bieringer.net.

mx40.bieringer.de uses the same mail server setup as other domains, such as deepspace6.net, co2.bieringer.net and bieringer.de.

mx40.bieringer.de shares some mail servers with other domains at least partially, for example bieringer.net.

These mail servers are often used together with the mail servers co1.bieringer.net.

co2.bieringer.net resolves to two IP numbers: 2a02:c206:3012:2939::1 and 158.220.124.161.

mx40.bieringer.de - robtex.com