studeersnel.nl

Checked 22 October 2026, 16:21 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 info

Registration

info

.nl country-code

Found

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

Delegation

info

ns-107.awsdns-13.com, ns-1102.awsdns-09.org, ns-1952.awsdns-52.co.uk, ns-820.awsdns-38.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-107.awsdns-13.com, ns-1102.awsdns-09.org, ns-1952.awsdns-52.co.uk, ns-820.awsdns-38.net
NS in the zone
ns-107.awsdns-13.com, ns-1102.awsdns-09.org, ns-1952.awsdns-52.co.uk, ns-820.awsdns-38.net
NameserverAddressesNetwork (AS)Glue
ns-107.awsdns-13.com205.251.192.107 2600:9000:5300:6b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1102.awsdns-09.org205.251.196.78 2600:9000:5304:4e00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1952.awsdns-52.co.uk205.251.199.160 2600:9000:5307:a000::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-820.awsdns-38.net205.251.195.52 2600:9000:5303:3400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-107.awsdns-13.com, ns-1102.awsdns-09.org, ns-1952.awsdns-52.co.uk, ns-820.awsdns-38.net.
  • ✓ 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 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 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 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-107.awsdns-13.com 205.251.192.107NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-107.awsdns-13.com 2600:9000:5300:6b00::1NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns-1102.awsdns-09.org 205.251.196.78NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1102.awsdns-09.org 2600:9000:5304:4e00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1952.awsdns-52.co.uk 205.251.199.160NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1952.awsdns-52.co.uk 2600:9000:5307:a000::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-820.awsdns-38.net 205.251.195.52NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-820.awsdns-38.net 2600:9000:5303:3400::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 1 · primary ns-107.awsdns-13.com

Found

Primary (MNAME)
ns-107.awsdns-13.com
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-107.awsdns-13.com (205.251.192.107)1
ns-107.awsdns-13.com (2600:9000:5300:6b00::1)1
ns-1102.awsdns-09.org (205.251.196.78)1
ns-1102.awsdns-09.org (2600:9000:5304:4e00::1)1
ns-1952.awsdns-52.co.uk (205.251.199.160)1
ns-1952.awsdns-52.co.uk (2600:9000:5307:a000::1)1
ns-820.awsdns-38.net (205.251.195.52)1
ns-820.awsdns-38.net (2600:9000:5303:3400::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-107.awsdns-13.com is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

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

warn

25 records at the apex

Found

Read from
205.251.192.107:53
TypeValueTTL
SOAns-107.awsdns-13.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-107.awsdns-13.com.172800
NSns-1102.awsdns-09.org.172800
NSns-1952.awsdns-52.co.uk.172800
NSns-820.awsdns-38.net.172800
A52.207.8.13860
A34.230.214.24660
A98.85.166.14660
MX1 aspmx.l.google.com.86400
MX10 alt3.aspmx.l.google.com.86400
MX10 alt4.aspmx.l.google.com.86400
MX5 alt1.aspmx.l.google.com.86400
MX5 alt2.aspmx.l.google.com.86400
TXT"ahrefs-site-verification_a69a5c7e0cf8d330a60d94b186c862c6814019cb36c1c358e37d5ee7b1a5d1ed"86400
TXT"apple-domain-verification=xeYZAlVyX43Vs6dD"86400
TXT"digicert-verification=_vi4698wzvlf1brs063rprsvxl0dmoqx"86400
TXT"facebook-domain-verification=u3yb61diabkg96kk28mz20c2vrkjdd"86400
TXT"google-site-verification=FvZI8uT4leIjq__DFPwkdOIJnMQSIfecCPZ7dImskbg"86400
TXT"pinterest-site-verification=adec26a8fe07f712851f953c850e9b15"86400
TXT"v=spf1 a mx include:mail.zendesk.com include:_spf.google.com -all"86400
CAA0 iodef "mailto:security@studocu.com"86400
CAA0 issue "amazon.com"86400
CAA0 issue "digicert.com"86400
CAA0 issue "letsencrypt.org"86400
CAA0 issue "pki.goog"86400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 2d; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, digicert.com, letsencrypt.org, pki.goog.