swapfiets.nl

Checked 22 October 2026, 16:30 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 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/swapfiets.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/swapfiets.nl returned HTTP 429
    #3

Delegation

info

coby.ns.cloudflare.com, gemma.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
coby.ns.cloudflare.com, gemma.ns.cloudflare.com
NS in the zone
coby.ns.cloudflare.com, gemma.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
coby.ns.cloudflare.com173.245.59.92 108.162.193.92 172.64.33.92 2606:4700:58::adf5:3b5c 2803:f800:50::6ca2:c15c 2a06:98c1:50::ac40:215cAS13335 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-
gemma.ns.cloudflare.com172.64.34.27 108.162.194.27 162.159.38.27 2803:f800:50::6ca2:c21b 2606:4700:50::a29f:261b 2a06:98c1:50::ac40:221bAS13335 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: coby.ns.cloudflare.com, gemma.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
coby.ns.cloudflare.com 173.245.59.92NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
coby.ns.cloudflare.com 108.162.193.92NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
coby.ns.cloudflare.com 172.64.33.92NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coby.ns.cloudflare.com 2606:4700:58::adf5:3b5cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
coby.ns.cloudflare.com 2803:f800:50::6ca2:c15cNOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
coby.ns.cloudflare.com 2a06:98c1:50::ac40:215cNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 172.64.34.27NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 108.162.194.27NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 162.159.38.27NOERROR, 34 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 2803:f800:50::6ca2:c21bNOERROR, 18 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 2606:4700:50::a29f:261bNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
gemma.ns.cloudflare.com 2a06:98c1:50::ac40:221bNOERROR, 19 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: coby.ns.cloudflare.com: "2026.10.2"; gemma.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 2417974815 · primary coby.ns.cloudflare.com

Found

Primary (MNAME)
coby.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2417974815
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
coby.ns.cloudflare.com (173.245.59.92)2417974815
coby.ns.cloudflare.com (108.162.193.92)2417974815
coby.ns.cloudflare.com (172.64.33.92)2417974815
coby.ns.cloudflare.com (2606:4700:58::adf5:3b5c)2417974815
coby.ns.cloudflare.com (2803:f800:50::6ca2:c15c)2417974815
coby.ns.cloudflare.com (2a06:98c1:50::ac40:215c)2417974815
gemma.ns.cloudflare.com (172.64.34.27)2417974815
gemma.ns.cloudflare.com (108.162.194.27)2417974815
gemma.ns.cloudflare.com (162.159.38.27)2417974815
gemma.ns.cloudflare.com (2803:f800:50::6ca2:c21b)2417974815
gemma.ns.cloudflare.com (2606:4700:50::a29f:261b)2417974815
gemma.ns.cloudflare.com (2a06:98c1:50::ac40:221b)2417974815

Checks

  • ✓ Serial 2417974815 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 coby.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 2417974815 is a Unix timestamp (2046-08-15 19:40 UTC).

DNSSEC

info

Signed, DS published at parent

Found

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

DS at the parent

Key tagAlgorithmDigestMatches a key
2371ECDSAP256SHA256 (13)SHA256 BC2EAB40981C2A91…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 2026-10-21 15:30 UTC and expires at 2026-10-23 17:30 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

info

18 records at the apex

Found

Read from
173.245.59.92:53
TypeValueTTL
SOAcoby.ns.cloudflare.com. dns.cloudflare.com. 2417974815 10000 2400 604800 18001800
NScoby.ns.cloudflare.com.86400
NSgemma.ns.cloudflare.com.86400
A172.64.148.35300
A104.18.39.221300
AAAA2606:4700:440a::ac40:9423300
AAAA2606:4700:4405::6812:27dd300
MX10 aspmx.l.google.com.600
MX20 alt1.aspmx.l.google.com.600
MX20 alt2.aspmx.l.google.com.600
MX30 aspmx2.googlemail.com.600
MX30 aspmx3.googlemail.com.600
TXT"amazonses:cvrs4lusoqpsoicqx4xfcxxi9qftc0z6s4y/kg9k1hm="30
TXT"google-site-verification=3HxP5LilpaJgOa66YoiLNlh4RbHIoDm8DmGxmDrC5ww"30
TXT"google-site-verification=vAUWW7BVDZcgkB4aZBVqS3eoX_F0WISipLKZwQ_vXyk"30
TXT"miro-verification=c00c6c8de5ec64514c4d975e458648077c2b0853"30
TXT"ms=ms65735733"30
TXT"v=spf1 include:_spf.google.com include:sendgrid.net include:_spf.exactonline.nl include:26472838.spf02.hubspotemail.net ~all"30

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 10m, NS 1d. The NS TTL at the parent is 1h and in the zone 1d; 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