Domain report: oncampus.de

Registration

info

.de country-code

i

.de is a country-code TLD (ccTLD)

Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.

#1
✓ TLD delegated and signed #2

.de is delegated in the root zone and DNSSEC-signed.
i

Registration data not available

No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.

#3

info

dns-1.dfn.de, dns-3.dfn.de, dns.fh-luebeck.de

Nameserver	Addresses	Network (AS)	Glue
dns-1.dfn.de	193.174.75.50 2001:638:d:b101::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns-3.dfn.de	193.174.75.58 2001:638:d:b103::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns.fh-luebeck.de	193.175.120.17	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	193.175.120.17

✓ 3 nameservers #6

Delegated to dns-1.dfn.de, dns-3.dfn.de, dns.fh-luebeck.de.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ No glue needed #8

All nameservers are outside the zone, so no glue records are needed.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
i

One address family in one network

all IPv6 addresses are in 2001:638:d::/48, while the other address family is spread over several networks.

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 5 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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All nameserver names under .de

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
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Partly IPv6

These nameservers have no IPv6 address: dns.fh-luebeck.de.

#13

info

5 of 5 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns-1.dfn.de 193.174.75.50	NOERROR, 12 ms, authoritative	no	yes / yes	refused	0
dns-1.dfn.de 2001:638:d:b101::1	NOERROR, 12 ms, authoritative	no	yes / yes	refused	0
dns-3.dfn.de 193.174.75.58	NOERROR, 10 ms, authoritative	no	yes / yes	refused	0
dns-3.dfn.de 2001:638:d:b103::1	NOERROR, 10 ms, authoritative	no	yes / yes	refused	0
dns.fh-luebeck.de 193.175.120.17	NOERROR, 19 ms, authoritative	no	yes / yes	refused	-

✓ All respond #14

All 5 nameserver addresses answered.
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
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Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: dns-1.dfn.de: "0"; dns-3.dfn.de: "0".

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✓ TCP supported #19

All nameservers answer over TCP.
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

pass

serial 2026100101 · primary dns.fh-luebeck.de

✓ Serial 2026100101 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 4h, retry 30m, expire 14d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver dns.fh-luebeck.de is one of the listed nameservers.
✓ Contact netzadmin@fh-luebeck.de #25

The SOA RNAME netzadmin.fh-luebeck.de means netzadmin@fh-luebeck.de.
✓ Date-based serial #26

The serial 2026100101 follows the YYYYMMDDnn convention (2026-10-01).

warn

Not signed

info

12 records at the apex

Type	Value	TTL
SOA	dns.fh-luebeck.de. netzadmin.fh-luebeck.de. 2026100101 14400 1800 1209600 3600	86400
NS	dns.fh-luebeck.de.	86400
NS	dns-1.dfn.de.	86400
NS	dns-3.dfn.de.	86400
A	188.245.186.217	86400
AAAA	2a01:4f8:1c1b:ec64::1	86400
MX	10 b2471.mx.srv.dfn.de.	86400
MX	10 a2471.mx.srv.dfn.de.	86400
MX	10 c2471.mx.srv.dfn.de.	86400
TXT	"v=spf1 ip4:193.175.120.112/30 ip6:2001:638:707:5::0/64 ip4:193.175.120.192/26 ip6:2001:638:707:10::0/64 ip4:193.175.120.16/28 ip4:193.175.122.157/32 ip6:2001:638:707:122::157/128 ip4:104.160.64.0/21 include:_spf.getresponse.com ~all"	86400
TXT	"google-site-verification=hXDU8xgUhBLgETUgWWCcJwS-0PZRp7NBQMW42pUvNZE"	86400
TXT	"adobe-idp-site-verification=794219687a29c98f5928d3ffc94f1868352f5471d2da74d0fadd5036913e99ee"	86400