`rt.boerde.de`

DNSSEC	⚠️ Not signed
A	212.21.75.86^{🇩🇪 DHOSTING-NET212.21.64.0/19 D-Hosting GmbH}
		PTR	`rt.boerde.de`
MX	`mail.boerde.de` ⭐
		A	2a01:30:2000:100::66^{🇩🇪 SINMA-ASN2a01:30::/32 Sinma GmbH BLN AK}
			PTR	`mail.boerde.de`
		A	212.21.75.66^{🇩🇪 DHOSTING-NET212.21.64.0/19 D-Hosting GmbH}

`boerde.de`

	DNSSEC	⚠️ Not signed
	A	2a01:30:2000:100::93^{🇩🇪 SINMA-ASN2a01:30::/32 Sinma GmbH BLN AK}
	A	212.21.75.93^{🇩🇪 DHOSTING-NET212.21.64.0/19 D-Hosting GmbH}
	NS	`relay.boerde.de` ⭐
	NS	`dns1.isp-eg.de`
	NS	`dns31.sinma.de`
	NS	`ns12.boerde.de`
	MX	`mail.boerde.de` ⭐
	MX	`mx2.boerde.de`⁽⁵⁰⁾
	TXT	`v=spf1 mx include:_spf.boerde.de -all`
	SOA	`relay.boerde.de`hergo@relay.boerde.de 2026-04-02 #1

rank #880577 globally
rank #33521 in the tld
📈 Tranco rank: #157,173

PTR for

86.75.21.212.in-addr.arpa

Same first word

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rt.co.uk

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DNS History

2 records (2 active, 0 former)

●MXmail.boerde.de2026-02-22 → 2026-04-22 · 2 obs

● 2026-02-22 09:02:44
● 2026-04-22 05:18:36

●A212.21.75.862026-02-22 → 2026-04-22 · 2 obs

● 2026-02-22 09:02:44
● 2026-04-22 05:18:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
boerde.de	dns31.sinma.de, ns12.boerde.de, dns1.isp-eg.de, relay.boerde.de	7 records

✅ Authoritative Response

Server:212.21.75.66

NS records: dns31.sinma.de, ns12.boerde.de, dns1.isp-eg.de, relay.boerde.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for boerde.de (unsigned zone)

⏱️ Timing

Total: 805ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`212.21.75.86`
MX	1	`mail.boerde.de (pri: 10)`

📌 Glue Records Collected

Total: 7

In-bailiwick: 4 (ns12.boerde.de, relay.boerde.de, ns12.boerde.de...)

Out-of-bailiwick: 3 (dns1.isp-eg.de, dns31.sinma.de, dns1.isp-eg.de)

Analysis

IP Addresses

rt.boerde.de points to a single IP address: 212.21.75.86.

Mail Servers

The mail.boerde.de mail server handles rt.boerde.de.

rt.boerde.de shares its mail server setup with other domains, for example goliath.boerde.de, lernmanagementsysteme.de and dennis.boerde.de.

rt.boerde.de shares at least partially some mail servers with other domains, for instance joergk198.boerde.de, www.boerde.de, mx1.boerde.de, westarp-vs.de and anixgw.boerde.de.

These mail servers commonly pair with mx2.boerde.de, mx-a.boerde.de, mgate3.boerde.de, m4tr1x.boerde.de and mailgate2.boerde.de.

mail.boerde.de points to two IP numbers: 2a01:30:2000:100::66 and 212.21.75.66.

rt.boerde.de - robtex.com

rt.boerde.de

boerde.de