nibc.nl

.nl country-code

Found

TLD

.nl (country-code)

ICANN policies apply

no

Checks

• i

  .nl 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

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

  Could not be checked

  The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/nibc.nl returned HTTP 429

  #3

anycast-eu.dns.sqr.nl, unicast-eu.dns.sqr.domains

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

anycast-eu.dns.sqr.nl, unicast-eu.dns.sqr.domains

NS in the zone

anycast-eu.dns.sqr.nl, unicast-eu.dns.sqr.domains

Checks

• i

  2 nameservers

  Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: anycast-eu.dns.sqr.nl, unicast-eu.dns.sqr.domains.

  #6
• ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
• i

  All nameservers in one AS

  All nameserver addresses are announced by one network operator (AS8674 (NETNOD-IX - Netnod AB, SE): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

  #11
• ✓ Nameserver names under 2 TLDs #12

  Nameserver names use the TLDs .domains, .nl.
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

serial 2026102203 · primary ns1.sqr.nl

Found

Primary (MNAME)

ns1.sqr.nl

Contact (RNAME)

hostmaster.nibc.nl

Serial

2026102203

Refresh / retry

16384 s / 2048 s

Expire

1048576 s

Negative TTL

300 s

Serial per nameserver

Checks

• ✓ Serial 2026102203 everywhere #22

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

  SOA refresh 4h33m4s, retry 34m8s, expire 291h16m16s, negative TTL 5m.
• i

  Hidden master

  The primary nameserver ns1.sqr.nl is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

  #24
• ✓ Contact hostmaster@nibc.nl #25

  The SOA RNAME hostmaster.nibc.nl means hostmaster@nibc.nl.
• ✓ Date-based serial #26

  The serial 2026102203 follows the YYYYMMDDnn convention (2026-10-22).

Signed, DS published at parent

Found

Validated by resolver

yes

Denial of existence

NSEC

Signatures valid until

5 November 2026

DS at the parent

DNSKEY in the zone

Checks

• ✓ Signed and validated #27

  The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
• ✓ DS matches a key #28

  The DS record at the parent matches a key in the zone: key tag 61931 (SHA256).
• ✓ Modern algorithms #29

  Key algorithms: ECDSAP256SHA256 (13).
• ✓ Signatures valid until 2026-11-05 #30

  The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 UTC.
• i

  NSEC

  The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.

  #31