prescan.nl

Checked 22 October 2026, 15:20 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 7 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/prescan.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/prescan.nl returned HTTP 429
    #3

Delegation

warn

ns1.dnsman.nl, ns2.dnsman.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.dnsman.nl, ns2.dnsman.nl
NS in the zone
ns1.dnsman.nl, ns2.dnsman.nl
NameserverAddressesNetwork (AS)Glue
ns1.dnsman.nl81.26.219.100 2a02:728:e:66::100AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL81.26.219.100
ns2.dnsman.nl81.26.208.160 2a02:728:e:758::160AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL81.26.208.160

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.dnsman.nl, ns2.dnsman.nl.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1.dnsman.nl (glue 81.26.219.100, zone 81.26.219.100, 2a02:728:e:66::100); ns2.dnsman.nl (glue 81.26.208.160, zone 81.26.208.160, 2a02:728:e:758::160). Update the glue at your registrar.
    #8
  • ✓ 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.

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.dnsman.nl 81.26.219.100NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns1.dnsman.nl 2a02:728:e:66::100NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns2.dnsman.nl 81.26.208.160NOERROR, 9 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)
ns2.dnsman.nl 2a02:728:e:758::160NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)

Checks

  • ✓ 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.dnsman.nl: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:23:58 by root@3aa022a45e3d)"; ns2.dnsman.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.

SOA

pass

serial 2021051001 · primary ns1.dnsman.nl

Found

Primary (MNAME)
ns1.dnsman.nl
Contact (RNAME)
hostmaster.dnsman.nl
Serial
2021051001
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
ns1.dnsman.nl (81.26.219.100)2021051001
ns1.dnsman.nl (2a02:728:e:66::100)2021051001
ns2.dnsman.nl (81.26.208.160)2021051001
ns2.dnsman.nl (2a02:728:e:758::160)2021051001

Checks

  • ✓ Serial 2021051001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 3h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dnsman.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@dnsman.nl #25
    The SOA RNAME hostmaster.dnsman.nl means hostmaster@dnsman.nl.
  • ✓ Date-based serial #26
    The serial 2021051001 follows the YYYYMMDDnn convention (2021-05-10).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC3
NSEC3
0 iterations, 0-byte salt
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
14421ECDSAP256SHA256 (13)SHA256 2924BC882F0F18A9…yes

DNSKEY in the zone

Key tagRoleAlgorithm
14421KSK (257)ECDSAP256SHA256 (13)

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 14421 (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.
  • ✓ NSEC3 as recommended #31
    The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

12 records at the apex

Found

Read from
81.26.219.100:53
TypeValueTTL
SOAns1.dnsman.nl. hostmaster.dnsman.nl. 2021051001 10800 3600 604800 1080010800
NSns2.dnsman.nl.10800
NSns1.dnsman.nl.10800
A34.32.162.103600
MX10 prescan-nl.mail.protection.outlook.com.10800
TXT"google-site-verification=MmUTmXB5jGM2iqY99UuHSAS1nX5KELeQlQj6lLjWMXc"10800
TXT"openai-domain-verification=dv-SPFqXPatNWyy5J45lbLrpBOM"10800
TXT"atlassian-domain-verification=cUp6xlntecomptfRvGtvRDF0dJu57tefKNSecDiWdvNUofmm8caGxdAyt2gn6awr"10800
TXT"adobe-sign-verification=b22a84956b216f9c310b9d653179b1bc"10800
TXT"stripe-verification=46868C48816A1CE09A46DE0AE88FC83FE1D51967192950A9263E5807E67BEFF7"10800
TXT"MS=ms85489200"10800
TXT"v=spf1 ip4:185.202.253.48 ip4:87.128.31.252 include:relays.beveiligdmailen.nl include:spf.protection.outlook.com include:emsd1.com -all"10800

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 3h, NS 3h. The NS TTL at the parent is 1h and in the zone 3h; 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