Domain report: vastgoedcert.nl

Registration

info

.nl country-code

Lookup error: https://rdap.sidn.nl/domain/vastgoedcert.nl returned HTTP 429

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/vastgoedcert.nl returned HTTP 429

#3

info

ns1.dnstools.nl, ns2.dnstools.nl

Nameserver	Addresses	Network (AS)	Glue
ns1.dnstools.nl	81.26.219.100 2a02:728:e:66::100	AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL	81.26.219.100 2a02:728:e:66::100
ns2.dnstools.nl	81.26.208.160 2a02:728:e:758::160	AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL	81.26.208.160 2a02:728:e:758::160

i

2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.dnstools.nl, ns2.dnstools.nl.

#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.
i

One address family in one network

all IPv6 addresses are in 2a02:728:e::/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 (AS31673 (UNISERVER-AS - Uniserver Internet B.V., NL): 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
i

All nameserver names under .nl

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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

warn

4 of 4 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.dnstools.nl 81.26.219.100	NOERROR, 10 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns1.dnstools.nl 2a02:728:e:66::100	NOERROR, 15 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns2.dnstools.nl 81.26.208.160	NOERROR, 10 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns2.dnstools.nl 2a02:728:e:758::160	NOERROR, 10 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)

✓ All respond #14

All 4 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.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.dnstools.nl: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)"; ns2.dnstools.nl: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)". Hide or replace the version string.

#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 2026102201 · primary ns1.dnstools.nl

✓ Serial 2026102201 everywhere #22

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

SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver ns1.dnstools.nl is one of the listed nameservers.
✓ Contact hostmaster@vastgoedcert.nl #25

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

The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

warn

Not signed

info

6 records at the apex

Type	Value	TTL
SOA	ns1.dnstools.nl. hostmaster.vastgoedcert.nl. 2026102201 10800 3600 604800 3600	3600
NS	ns1.dnstools.nl.	3600
NS	ns2.dnstools.nl.	3600
A	136.144.170.82	3600
MX	0 vastgoedcert-nl.mail.protection.outlook.com.	3600
TXT	"v=spf1 a ip4:31.3.97.254 ip4:31.3.97.253 ip4:92.68.158.14 ip4:171.33.129.134 include:spf.protection.outlook.com include:spf.mailjet.com ~all"	3600