santander.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/santander.nl returned HTTP 429

  #3

ns1.santander.nl, ns2.santander-global.eu, ns3.santander.nl, ns4.santander-global.eu

Found

Parent zone

nl

Delegation from

ns1.dns.nl (194.0.28.53)

NS at the parent

ns1.santander.nl, ns2.santander-global.eu, ns3.santander.nl, ns4.santander-global.eu

NS in the zone

ns1.santander.nl, ns2.santander-global.eu, ns3.santander.nl, ns4.santander-global.eu

Checks

• ✓ 4 nameservers #6

  Delegated to ns1.santander.nl, ns2.santander-global.eu, ns3.santander.nl, ns4.santander-global.eu.
• ✓ Parent and zone agree #7

  The parent delegation and the zone's NS records list the same nameservers.
• ✓ Glue present and correct #8

  Glue is published for the nameservers inside the zone: ns1.santander.nl, ns3.santander.nl.
• ✓ 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 2001:7b8:62b::/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 (AS12859 (NL-BIT - BIT BV, NL): 8 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 .eu, .nl.
• ✓ All reachable over IPv6 #13

  Every nameserver has an IPv6 address.

serial 2026102103 · primary nsauth1.bit.nl

Found

Primary (MNAME)

nsauth1.bit.nl

Contact (RNAME)

hostmaster.bit.nl

Serial

2026102103

Refresh / retry

28800 s / 7200 s

Expire

604800 s

Negative TTL

600 s

Serial per nameserver

Checks

• ✓ Serial 2026102103 everywhere #22

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

  SOA refresh 8h, retry 2h, expire 7d, negative TTL 10m.
• i

  Hidden master

  The primary nameserver nsauth1.bit.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@bit.nl #25

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

  The serial 2026102103 follows the YYYYMMDDnn convention (2026-10-21).

25 records at the apex

Found

Read from

212.114.113.48:53

Checks

• ✓ TTLs within range #32

  TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 1h and in the zone 10m; resolvers may use either.
• ✓ No CNAME at the apex #33

  The zone apex has no CNAME record.
• ✓ No wildcard #34

  Names that don't exist return NXDOMAIN.
• i

  No CAA records

  Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

  #35