unimaas.nl

Checked 21 October 2026, 21:26 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 0 failed 6 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns1.maastrichtuniversity.nl, ns1.surfnet.nl, ns1.zurich.surf.net, ns2.maastrichtuniversity.eu

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.maastrichtuniversity.nl, ns1.surfnet.nl, ns1.zurich.surf.net, ns2.maastrichtuniversity.eu
NS in the zone
ns1.maastrichtuniversity.nl, ns1.surfnet.nl, ns1.zurich.surf.net, ns2.maastrichtuniversity.eu
NameserverAddressesNetwork (AS)Glue
ns1.maastrichtuniversity.nl137.120.24.50AS1103 SURFNET-NL - SURF B.V., NL137.120.24.50
ns1.surfnet.nl192.87.106.101 2001:610:1:800a:192:87:106:101AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL192.87.106.101 2001:610:1:800a:192:87:106:101
ns1.zurich.surf.net195.176.255.9 2001:620:0:9::1103AS559 Switch - SWITCH, CH AS559 Switch - SWITCH, CH-
ns2.maastrichtuniversity.eu137.120.24.51AS1103 SURFNET-NL - SURF B.V., NL-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.maastrichtuniversity.nl, ns1.surfnet.nl, ns1.zurich.surf.net, ns2.maastrichtuniversity.eu.
  • ✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS1103 (SURFNET-NL - SURF B.V., NL): 4 addresses; AS559 (Switch - SWITCH, CH): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .eu, .net, .nl.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.maastrichtuniversity.nl, ns2.maastrichtuniversity.eu.
    #13

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.maastrichtuniversity.nl 137.120.24.50NOERROR, 15 ms, authoritativenoyes / yesrefused-
ns1.surfnet.nl 192.87.106.101NOERROR, 10 ms, authoritativenoyes / yesrefusedThis is a SURFnet nameserver - dns-beheer@surfnet.nl
ns1.surfnet.nl 2001:610:1:800a:192:87:106:101NOERROR, 9 ms, authoritativenoyes / yesrefusedThis is a SURFnet nameserver - dns-beheer@surfnet.nl
ns1.zurich.surf.net 195.176.255.9NOERROR, 9 ms, authoritativenoyes / yesrefusedThis is a SURFnet nameserver - dns-beheer@surf.nl
ns1.zurich.surf.net 2001:620:0:9::1103NOERROR, 9 ms, authoritativenoyes / yesrefusedThis is a SURFnet nameserver - dns-beheer@surf.nl
ns2.maastrichtuniversity.eu 137.120.24.51NOERROR, 15 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 6 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.surfnet.nl: "This is a SURFnet nameserver - dns-beheer@surfnet.nl"; ns1.zurich.surf.net: "This is a SURFnet nameserver - dns-beheer@surf.nl".
    #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 2014044839 · primary ns1.maastrichtuniversity.nl

Found

Primary (MNAME)
ns1.maastrichtuniversity.nl
Contact (RNAME)
postmaster.unimaas.nl
Serial
2014044839
Refresh / retry
10800 s / 3600 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.maastrichtuniversity.nl (137.120.24.50)2014044839
ns1.surfnet.nl (192.87.106.101)2014044839
ns1.surfnet.nl (2001:610:1:800a:192:87:106:101)2014044839
ns1.zurich.surf.net (195.176.255.9)2014044839
ns1.zurich.surf.net (2001:620:0:9::1103)2014044839
ns2.maastrichtuniversity.eu (137.120.24.51)2014044839

Checks

  • ✓ Serial 2014044839 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 28d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.maastrichtuniversity.nl is one of the listed nameservers.
  • ✓ Contact postmaster@unimaas.nl #25
    The SOA RNAME postmaster.unimaas.nl means postmaster@unimaas.nl.
  • ✓ Timestamp serial #26
    The serial 2014044839 is a Unix timestamp (2033-10-27 16:53 UTC).

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

9 records at the apex

Found

Read from
137.120.24.50:53
TypeValueTTL
SOAns1.maastrichtuniversity.nl. postmaster.unimaas.nl. 2014044839 10800 3600 2419200 90028800
NSns1.zurich.surf.net.28800
NSns1.maastrichtuniversity.nl.28800
NSns1.surfnet.nl.28800
NSns2.maastrichtuniversity.eu.28800
MX10 unimaas-nl.mail.protection.outlook.com.300
TXT"HARICA-ZZWXh7BHl1gkJj13CrG"300
TXT"HARICA-h2iIR2UBJTei8qXxhU6"300
TXT"v=spf1 include:spf.protection.outlook.com -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: MX 5m, NS 8h. The NS TTL at the parent is 1h and in the zone 8h; 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