urgenda.nl

Checked 21 October 2026, 21:26 UTC · via 8.8.8.8
!Passed with warnings
18 passed 3 warnings 0 failed 8 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/urgenda.nl returned HTTP 429

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/urgenda.nl returned HTTP 429
    #3

Delegation

warn

ns1.vijf.online, ns2.vijf.online

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.vijf.online, ns2.vijf.online
NS in the zone
ns1.vijf.online, ns2.vijf.online
NameserverAddressesNetwork (AS)Glue
ns1.vijf.online87.236.103.136AS60781 LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL-
ns2.vijf.online87.236.103.136AS60781 LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.vijf.online, ns2.vijf.online.
    #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 one network
    all IPv4 addresses are in 87.236.103.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS60781 (LEASEWEB-NL-AMS-01 - LeaseWeb Netherlands B.V., NL): 2 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 .online
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.vijf.online 87.236.103.136NOERROR, 9 ms, authoritativenoyes / yesrefusednone
ns2.vijf.online 87.236.103.136NOERROR, 9 ms, authoritativenoyes / yesrefusednone

Checks

  • ✓ All respond #14
    All 2 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.vijf.online: "none"; ns2.vijf.online: "none".
    #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.

SOA

pass

serial 2026092323 · primary ns1.vijf.online

Found

Primary (MNAME)
ns1.vijf.online
Contact (RNAME)
martijn\.scheutjens.urgenda.nl
Serial
2026092323
Refresh / retry
10800 s / 3600 s
Expire
1209600 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
ns1.vijf.online (87.236.103.136)2026092323
ns2.vijf.online (87.236.103.136)2026092323

Checks

  • ✓ Serial 2026092323 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 14d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.vijf.online is one of the listed nameservers.
  • ✓ Contact martijn.scheutjens@urgenda.nl #25
    The SOA RNAME martijn\.scheutjens.urgenda.nl means martijn.scheutjens@urgenda.nl.
  • ✓ Date-based serial #26
    The serial 2026092323 follows the YYYYMMDDnn convention (2026-09-23).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

7 records at the apex

Found

Read from
87.236.103.136:53
TypeValueTTL
SOAns1.vijf.online. Martijn\.Scheutjens.urgenda.nl. 2026092323 10800 3600 1209600 1080014400
NSns2.vijf.online.14400
NSns1.vijf.online.14400
A87.236.103.13614400
MX0 urgenda-nl.mail.protection.outlook.com.3600
TXT"v=spf1 a:mail.vijf.online ip4:92.68.203.170 ip4:89.146.11.192 ip4:216.146.32.161 ip4:216.146.32.188 ip4:216.146.32.187 ip4:216.146.32.186 ip4:216.146.32.185 ip4:81.93.173.201 ip4:81.93.164.103 include:spf.protection.outlook.com include:servers.mcsv.net ip" "4:193.93.174.216 ~all"3600
TXT"google-site-verification=Qzop4G1RI4NzY8my3kzkovSzm-ZTa4SImd4Zt7SCPj4"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 1h, NS 4h. The NS TTL at the parent is 1h and in the zone 4h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • 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