`open.iserv.app`

CNAME	`iserv.app`
DNSSEC	⚠️ Not signed
A	2a01:4f8:c0c:ae45::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		PTR	`www3.iserv.eu`
A	2a01:4f8:c01f:4a::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
A	2a03:4000:1b:738::1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
A	116.202.2.255^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
A	116.203.121.185^{🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC}
A	188.68.60.9^{🇩🇪 netcup-AS188.68.60.0/24}
NS	`ns1.iserv.eu` ⭐
		A	2a01:4f8:c01f:42::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns1.iserv.eu`
		A	116.202.2.219^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
			PTR	`ns1.iserv.eu`
NS	`ns2.iserv.eu`
		A	2a03:4000:20:19b::1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`ns2.iserv.eu`
		A	91.204.44.133^{🇩🇪 netcup-AS91.204.44.0/22}
			PTR	`ns2.iserv.eu`
NS	`ns3.iserv.eu`
		A	2a01:4f8:1c0c:8111::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`ns3.iserv.eu`
		A	116.203.7.41^{🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC}
			PTR	`ns3.iserv.eu`
NS	`ns4.iserv.eu`
		A	2a03:4000:20:19e::1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`ns4.iserv.eu`
		A	188.68.45.203^{🇩🇪 netcup-AS188.68.32.0/20 NETCUP-GMBH}
			PTR	`ns4.iserv.eu`
MX	`iserv.app` ⭐
		A	2a01:4f8:c0c:ae45::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`www3.iserv.eu`
		A	2a01:4f8:c01f:4a::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`www1.iserv.eu`
		A	2a03:4000:1b:738::1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`www2.iserv.eu`
		A	116.202.2.255^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
			PTR	`www1.iserv.eu`
		A	116.203.121.185^{🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC}
			PTR	`www3.iserv.eu`
		A	188.68.60.9^{🇩🇪 netcup-AS188.68.60.0/24}
			PTR	`www2.iserv.eu`
MX	`offline.iserv.eu`⁽⁵⁰⁾
		A	2a01:4f8:c2c:4863::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		A	159.69.47.32^{🇩🇪 Hetzner159.69.0.0/16 HETZNER-DC}
			PTR	`static.32.47.69.159.clients.your-server.de`
TXT	`v=spf1 a mx a:relay1.iserv.eu a:relay2.iserv.eu a:relay3.iserv.eu a:relaybs.i...`
SOA	`ns1.iserv.eu`hostmaster@iserv.eu serial=355499734

`iserv.app`

	DNSSEC	⚠️ Not signed
	A	2a01:4f8:c0c:ae45::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
	A	2a01:4f8:c01f:4a::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
	A	2a03:4000:1b:738::1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
	A	116.202.2.255^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
	A	116.203.121.185^{🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC}
	A	188.68.60.9^{🇩🇪 netcup-AS188.68.60.0/24}
	NS	`ns1.iserv.eu` ⭐
	NS	`ns2.iserv.eu`
	NS	`ns3.iserv.eu`
	NS	`ns4.iserv.eu`
	MX	`iserv.app` ⭐
	MX	`offline.iserv.eu`⁽⁵⁰⁾
	TXT	`v=spf1 a mx a:relay1.iserv.eu a:relay2.iserv.eu a:relay3.iserv.eu a:relaybs.i...`
	SOA	`ns1.iserv.eu`hostmaster@iserv.eu serial=355499734

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DNS History

1 record (1 active, 0 former)

●CNAMEiserv.app2026-03-16 → 2026-04-25 · 2 obs

● 2026-03-16 12:38:54
● 2026-04-25 18:18:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld3.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	-
iserv.app	ns2.iserv.eu, ns1.iserv.eu, ns3.iserv.eu, ns4.iserv.eu	-

✅ Authoritative Response

Server:116.203.7.41

NS records: ns2.iserv.eu, ns1.iserv.eu, ns3.iserv.eu, ns4.iserv.eu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for iserv.app (unsigned zone)

⏱️ Timing

Total: 1256ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`iserv.app`

Analysis

IP Addresses

open.iserv.app maps to six IP numbers: 2a01:4f8:c0c:ae45::1, 2a01:4f8:c01f:4a::1, 2a03:4000:1b:738::1, 116.202.2.255, 116.203.121.185 and 188.68.60.9.

Other host names such as iserv.host, iserv.dev, www3.iserv.eu, doku.iserv.de and test-iserv.de share IPs with open.iserv.app.

Name Servers

open.iserv.app is delegated to four name servers: ns1.iserv.eu, ns2.iserv.eu, ns3.iserv.eu and ns4.iserv.eu.

open.iserv.app at least partially shares name servers with other domains, for example obs-ganderkesee.de, schule-gildehaus.de, schulzentrum-lorup.eu, kgs-hambergen.eu and schigy-og.de.

Host names with two IP numbers:

ns1.iserv.eu points to: 2a01:4f8:c01f:42::1 and 116.202.2.219

ns2.iserv.eu points to: 2a03:4000:20:19b::1 and 91.204.44.133

ns3.iserv.eu points to: 2a01:4f8:1c0c:8111::1 and 116.203.7.41

ns4.iserv.eu points to: 2a03:4000:20:19e::1 and 188.68.45.203

Mail Servers

Two mail servers handle open.iserv.app: iserv.app and offline.iserv.eu.

The mail server setup for open.iserv.app is the same as that of other domains, for instance iserv.app.

open.iserv.app shares at least partially some mail servers with other domains, for instance gs-fuerstenau.de, schlossbergschule-wabern.de, gs-hoheneggelsen.de, rsib-online.de and rs-kennedy.de.

Host names with six IP numbers:

iserv.app points to: 2a01:4f8:c0c:ae45::1, 2a01:4f8:c01f:4a::1, 2a03:4000:1b:738::1, 116.202.2.255, 116.203.121.185 and 188.68.60.9.