Domain report: metropoleruhr.de

Registration

info

.de country-code

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.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.
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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

pass

ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com
NS in the zone: ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com

Nameserver	Addresses	Network (AS)	Glue
ns1.first-ns.de	213.239.242.238 2a01:4f8:0:a101::a:1	AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE	-
robotns2.second-ns.de	213.133.100.103 2a01:4f8:0:1::5ddc:2	AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE	-
robotns3.second-ns.com	193.47.99.3 2001:67c:192c::add:a3	AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE	-

✓ 3 nameservers #6

Delegated to ns1.first-ns.de, robotns2.second-ns.de, robotns3.second-ns.com.
✓ 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.
✓ Nameservers in different networks #10

The nameservers are spread over 3 IPv4 /24s and 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 4 addresses.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .com, .de.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

pass

6 of 6 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.first-ns.de 213.239.242.238	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-
ns1.first-ns.de 2a01:4f8:0:a101::a:1	NOERROR, 2 ms, authoritative	no	yes / yes	refused	-
robotns2.second-ns.de 213.133.100.103	NOERROR, 2 ms, authoritative	no	yes / yes	refused	-
robotns2.second-ns.de 2a01:4f8:0:1::5ddc:2	NOERROR, 1 ms, authoritative	no	yes / yes	refused	-
robotns3.second-ns.com 193.47.99.3	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-
robotns3.second-ns.com 2001:67c:192c::add:a3	NOERROR, 6 ms, authoritative	no	yes / yes	refused	-

✓ All respond #14

All 6 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.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ 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.

warn

serial 2026101300 · primary ns1.first-ns.de.metropoleruhr.de

✓ Serial 2026101300 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

negative caching TTL (minimum) 1m40s is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 4h, retry 30m, expire 7d, negative TTL 1m40s.

#23
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Hidden master (not resolvable)

The primary nameserver ns1.first-ns.de.metropoleruhr.de is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.

#24
✓ Contact postmaster@robot.first-ns.de.metropoleruhr.de #25

The SOA RNAME postmaster.robot.first-ns.de.metropoleruhr.de means postmaster@robot.first-ns.de.metropoleruhr.de.
✓ Date-based serial #26

The serial 2026101300 follows the YYYYMMDDnn convention (2026-10-13).

warn

Not signed

info

7 records at the apex

Type	Value	TTL
SOA	ns1.first-ns.de.metropoleruhr.de. postmaster.robot.first-ns.de.metropoleruhr.de. 2026101300 14400 1800 604800 100	100
NS	robotns2.second-ns.de.	86400
NS	robotns3.second-ns.com.	86400
NS	ns1.first-ns.de.	86400
A	78.46.9.136	86400
MX	10 mail.metropoleruhr.de.	86400
TXT	"v=spf1 mx a ip4:217.78.131.128/28 ip4:89.246.241.193/29 ip4:89.246.242.97/27 ip4:85.22.68.1/24 ip4:91.216.128.1/24 ip4:78.46.9.136 ip4:78.46.9.136/32 include:spf.owl-it.de -all"	86400