avrotros.nl

Checked 21 October 2026, 20:45 UTC · via 8.8.8.8
!Passed with warnings
25 passed 2 warnings 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/avrotros.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/avrotros.nl returned HTTP 429
    #3

Delegation

info

carl.ns.cloudflare.com, carol.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
carl.ns.cloudflare.com, carol.ns.cloudflare.com
NS in the zone
carl.ns.cloudflare.com, carol.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
carl.ns.cloudflare.com108.162.193.106 173.245.59.106 172.64.33.106 2803:f800:50::6ca2:c16a 2a06:98c1:50::ac40:216a 2606:4700:58::adf5:3b6aAS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-
carol.ns.cloudflare.com108.162.192.80 173.245.58.80 172.64.32.80 2606:4700:50::adf5:3a50 2803:f800:50::6ca2:c050 2a06:98c1:50::ac40:2050AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: carl.ns.cloudflare.com, carol.ns.cloudflare.com.
    #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 different networks #10
    The nameservers are spread over 6 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 12 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 .com
    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

12 of 12 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
carl.ns.cloudflare.com 108.162.193.106NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carl.ns.cloudflare.com 173.245.59.106NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carl.ns.cloudflare.com 172.64.33.106NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carl.ns.cloudflare.com 2803:f800:50::6ca2:c16aNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
carl.ns.cloudflare.com 2a06:98c1:50::ac40:216aNOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
carl.ns.cloudflare.com 2606:4700:58::adf5:3b6aNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 108.162.192.80NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 173.245.58.80NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 172.64.32.80NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 2606:4700:50::adf5:3a50NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 2803:f800:50::6ca2:c050NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
carol.ns.cloudflare.com 2a06:98c1:50::ac40:2050NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2

Checks

  • ✓ All respond #14
    All 12 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: carl.ns.cloudflare.com: "2026.10.2"; carol.ns.cloudflare.com: "2026.10.2". 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 2417996512 · primary carl.ns.cloudflare.com

Found

Primary (MNAME)
carl.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417996512
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
carl.ns.cloudflare.com (108.162.193.106)2417996512
carl.ns.cloudflare.com (173.245.59.106)2417996512
carl.ns.cloudflare.com (172.64.33.106)2417996512
carl.ns.cloudflare.com (2803:f800:50::6ca2:c16a)2417996512
carl.ns.cloudflare.com (2a06:98c1:50::ac40:216a)2417996512
carl.ns.cloudflare.com (2606:4700:58::adf5:3b6a)2417996512
carol.ns.cloudflare.com (108.162.192.80)2417996512
carol.ns.cloudflare.com (173.245.58.80)2417996512
carol.ns.cloudflare.com (172.64.32.80)2417996512
carol.ns.cloudflare.com (2606:4700:50::adf5:3a50)2417996512
carol.ns.cloudflare.com (2803:f800:50::6ca2:c050)2417996512
carol.ns.cloudflare.com (2a06:98c1:50::ac40:2050)2417996512

Checks

  • ✓ Serial 2417996512 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h46m40s, retry 40m, expire 7d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver carl.ns.cloudflare.com is one of the listed nameservers.
  • ✓ Contact dns@cloudflare.com #25
    The SOA RNAME dns.cloudflare.com means dns@cloudflare.com.
  • ✓ Timestamp serial #26
    The serial 2417996512 is a Unix timestamp (2046-08-16 01:41 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
22 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 22973BC3B680EE43…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2371KSK (257)ECDSAP256SHA256 (13)
34505ZSK (256)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 2371 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 50h0m0s and created on demand; the current one was made at 2026-10-20 19:45 UTC and expires at 2026-10-22 21:45 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

43 records at the apex

Found

Read from
108.162.193.106:53
TypeValueTTL
SOAcarl.ns.cloudflare.com. dns.cloudflare.com. 2417996512 10000 2400 604800 18001800
NScarl.ns.cloudflare.com.86400
NScarol.ns.cloudflare.com.86400
A104.20.37.23300
A172.66.147.6300
AAAA2606:4700:10::6814:2517300
AAAA2606:4700:10::ac42:9306300
MX1 aspmx.l.google.com.120
MX10 alt3.aspmx.l.google.com.120
MX10 alt4.aspmx.l.google.com.120
MX5 alt1.aspmx.l.google.com.120
MX5 alt2.aspmx.l.google.com.120
TXT"1password-site-verification=CLJ6ZT62XVGUDNTOPVUYALKQQA"300
TXT"MS=ms17965982"300
TXT"anthropic-domain-verification-xr6qkp=lMhYfnl7LTEJiSK4YpCPsvRwl"300
TXT"apple-domain-verification=qkmuVqk4u17asMmh"300
TXT"atlassian-domain-verification=OznGm6EV69kynHzzxtXEXcVSZCviHwPxLs78T0qmNZzlxx88E5laJ1YiTfcy7zqE"300
TXT"canva-site-verification=ocuTKgg9PN5lOCMWT_d66A"300
TXT"dropbox-domain-verification=bhtbdyurrj9n"300
TXT"google-site-verification=GhPVzQCG6meo4wrw6pbhZyhC9oLzJ3VvT7UXPYRm0t8"300
TXT"google-site-verification=Qksv4J0M0B8cnFnpDHsT445Cp_H0NESGCppoAiO90rQ"300
TXT"google-site-verification=YJxi-Yp_hyfiXz0fRTnQFUNmXoQWMqRVRCROfkgtAeU"300
TXT"google-site-verification=tTZnzsZAvOPkwc0uBK-GUehd8XjZaADaRzrk3rLaFjQ"300
TXT"google-site-verification=yVXD8vNdRIev1bwHQdVgRvqkVUjdeNHMyBs2aEk3XmY"300
TXT"openai-domain-verification=dv-9CabILxheGVselUlPN2RU85S"300
TXT"projectdiscovery-verification=103663a33d"300
TXT"rDcv38ZGY6ZOcBUCJ399oioV4Fu9D2Eb"300
TXT"slack-domain-verification=2wQIvIJwhUvNlYjNua4Kn8dStf1nwfJWm83ai6gy"300
TXT"tiktok-developers-site-verification=pH9C9mRc8hOTvuPTBeCTCyVXVpVDPa12"300
TXT"trustpilot-one-time-verification-id=2a19b182-af9b-4d06-8284-7051afce5c82"300
TXT"v=spf1 include:mailgun.org ip4:94.103.26.99/32 ip4:145.58.30.176/28 include:spf.omroep.nl include:_spf.google.com include:_spf.avrotros.nl -all"300
CAA0 issue "amazon.com"600
CAA0 issue "amazontrust.com"600
CAA0 issue "comodoca.com"600
CAA0 issue "digicert.com; cansignhttpexchanges=yes"600
CAA0 issue "letsencrypt.org"600
CAA0 issue "pki.goog; cansignhttpexchanges=yes"600
CAA0 issue "ssl.com"600
CAA0 issuewild "comodoca.com"600
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"600
CAA0 issuewild "letsencrypt.org"600
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"600
CAA0 issuewild "ssl.com"600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (2m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 1d; 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, amazontrust.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.