`ollendorfsystems.com`

DNSSEC	⚠️ Not signed
A	2a01:238:20a:202:1080::^{🇩🇪 STRATO2a01:238:20a::/48 Strato AG}
A	81.169.145.80^{🇩🇪 STRATO81.169.144.0/22 AG}
NS	`docks11.rzone.de` ⭐
		A	2001:8d8:fe:53:5747:2a74:d:11^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`docks11.rzone.de`
		A	217.160.80.138^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`docks11.rzone.de`
NS	`shades12.rzone.de`
		A	2607:f1c0:fe:53:185:132:34:139^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`shades12.rzone.de`
		A	185.132.34.139^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`shades12.rzone.de`
MX	`smtpin.rzone.de` ⭐
		A	2a01:238:20a:202:50f0::1097^{🇩🇪 STRATO2a01:238:20a::/48 Strato AG}
			PTR	`smtpin.rzone.de`
		A	81.169.145.97^{🇩🇪 STRATO81.169.144.0/22 AG}
			PTR	`smtpin.rzone.de`
TXT	`MS=1C74B13351223F384D8F65E501DC7D3AB2AE1B4A`
TXT	`v=spf1 redirect=_spf.strato.com`
SOA	`docks11.rzone.de`hostmaster@strato-rz.de 2021-12-31 #31

`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=1775975732

Same first word

ollendorfsystems.com

DNS History

5 records (5 active, 0 former)

●NSdocks11.rzone.de2026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 17:21:32
● 2026-04-12 06:38:50

●NSshades12.rzone.de2026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 17:21:32
● 2026-04-12 06:38:50

●MXsmtpin.rzone.de2026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 17:21:32
● 2026-04-12 06:38:50

●A2a01:238:20a:202:1080::2026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 17:21:32
● 2026-04-12 06:38:50

●A81.169.145.802026-02-21 → 2026-04-12 · 2 obs

● 2026-02-21 17:21:32
● 2026-04-12 06:38:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
ollendorfsystems.com	docks11.rzone.de, shades12.rzone.de	-

✅ Authoritative Response

Server:217.160.80.138

NS records: docks11.rzone.de, shades12.rzone.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ollendorfsystems.com (unsigned zone)

⏱️ Timing

Total: 621ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.169.145.80`
AAAA	1	`2a01:238:20a:202:1080::`
NS	2	`shades12.rzone.de, docks11.rzone.de`
MX	1	`smtpin.rzone.de (pri: 5)`
TXT	2	`MS=1C74B13351223F384D8F65E501DC7D3AB2AE1, v=spf1 redirect=_spf.strato.com`
SOA	1	`docks11.rzone.de hostmaster.strato-rz.de`

Analysis

IP Addresses

ollendorfsystems.com points to two IP numbers: 2a01:238:20a:202:1080:: and 81.169.145.80.

Other host names, for instance hauke.mobi, reifen-nell.de, liljenqvist.com, devi-comfort.com and kacar.org share IP numbers with ollendorfsystems.com.

Name Servers

ollendorfsystems.com's delegation is to two name servers docks11.rzone.de and shades12.rzone.de.

ollendorfsystems.com shares the same name server configuration as other domains, such as evs-software.nl, glamour-clothing.com, antiquariat-schwarz-auf-weiss.de, mvtwente.nl and floridaforum.de.

ollendorfsystems.com at least partially shares its name servers with other domains, for instance teentreno.com, satzen.de, freisegeln.de, kaar.engineering and gruenes-zentrum-heist.de.

These name servers are commonly used with shades20.rzone.de, shades13.rzone.de, docks18.rzone.de, shades06.rzone.de, shades09.rzone.de, docks16.rzone.de, docks19.rzone.de, docks15.rzone.de, shades19.rzone.de and shades03.rzone.de.

Host names with two IP numbers: docks11.rzone.de points to 2001:8d8:fe:53:5747:2a74:d:11 and 217.160.80.138; shades12.rzone.de points to 2607:f1c0:fe:53:185:132:34:139 and 185.132.34.139

Mail Servers

ollendorfsystems.com is served by a single mail server, smtpin.rzone.de.

ollendorfsystems.com uses the same mail server setup as other domains such as atem-personal.biz, online-adr.de, babuk.org, syslo.de and mail.omega-zirkel.de.

Hostname smtpin.rzone.de resolves to two IPs: 2a01:238:20a:202:50f0::1097 and 81.169.145.97.

ollendorfsystems.com - robtex.com