sp.nl

Checked 21 October 2026, 21:25 UTC · via 8.8.8.8
!Passed with warnings
26 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/sp.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/sp.nl returned HTTP 429
    #3

Delegation

info

jerome.ns.cloudflare.com, sarah.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
jerome.ns.cloudflare.com, sarah.ns.cloudflare.com
NS in the zone
jerome.ns.cloudflare.com, sarah.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
jerome.ns.cloudflare.com173.245.59.181 108.162.193.181 172.64.33.181 2606:4700:58::adf5:3bb5 2803:f800:50::6ca2:c1b5 2a06:98c1:50::ac40:21b5AS13335 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-
sarah.ns.cloudflare.com108.162.194.218 172.64.34.218 162.159.38.218 2803:f800:50::6ca2:c2da 2606:4700:50::a29f:26da 2a06:98c1:50::ac40:22daAS13335 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: jerome.ns.cloudflare.com, sarah.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
jerome.ns.cloudflare.com 173.245.59.181NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jerome.ns.cloudflare.com 108.162.193.181NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
jerome.ns.cloudflare.com 172.64.33.181NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
jerome.ns.cloudflare.com 2606:4700:58::adf5:3bb5NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
jerome.ns.cloudflare.com 2803:f800:50::6ca2:c1b5NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
jerome.ns.cloudflare.com 2a06:98c1:50::ac40:21b5NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 108.162.194.218NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 172.64.34.218NOERROR, 14 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 162.159.38.218NOERROR, 32 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 2803:f800:50::6ca2:c2daNOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 2606:4700:50::a29f:26daNOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
sarah.ns.cloudflare.com 2a06:98c1:50::ac40:22daNOERROR, 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: jerome.ns.cloudflare.com: "2026.10.2"; sarah.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 2418061743 · primary jerome.ns.cloudflare.com

Found

Primary (MNAME)
jerome.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2418061743
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
jerome.ns.cloudflare.com (173.245.59.181)2418061743
jerome.ns.cloudflare.com (108.162.193.181)2418061743
jerome.ns.cloudflare.com (172.64.33.181)2418061743
jerome.ns.cloudflare.com (2606:4700:58::adf5:3bb5)2418061743
jerome.ns.cloudflare.com (2803:f800:50::6ca2:c1b5)2418061743
jerome.ns.cloudflare.com (2a06:98c1:50::ac40:21b5)2418061743
sarah.ns.cloudflare.com (108.162.194.218)2418061743
sarah.ns.cloudflare.com (172.64.34.218)2418061743
sarah.ns.cloudflare.com (162.159.38.218)2418061743
sarah.ns.cloudflare.com (2803:f800:50::6ca2:c2da)2418061743
sarah.ns.cloudflare.com (2606:4700:50::a29f:26da)2418061743
sarah.ns.cloudflare.com (2a06:98c1:50::ac40:22da)2418061743

Checks

  • ✓ Serial 2418061743 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 jerome.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 2418061743 is a Unix timestamp (2046-08-16 19:49 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 AAEB8D6E30464859…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 20:25 UTC and expires at 2026-10-22 22:25 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

pass

26 records at the apex

Found

Read from
173.245.59.181:53
TypeValueTTL
SOAjerome.ns.cloudflare.com. dns.cloudflare.com. 2418061743 10000 2400 604800 18001800
NSjerome.ns.cloudflare.com.86400
NSsarah.ns.cloudflare.com.86400
A172.67.69.161300
A104.26.3.80300
A104.26.2.80300
AAAA2606:4700:20::ac43:45a1300
AAAA2606:4700:20::681a:250300
AAAA2606:4700:20::681a:350300
MX10 mail.sp.nl.86400
TXT"google-site-verification=_Ci3443QcEuyTVHxUUCR2XKKbYqLsTs09A44ztEJF1M"43200
TXT"procurios-site-verification=SjaaPrvNQMB44cQhqgz9"43200
TXT"v=spf1 ip4:95.215.190.29 ip6:2a00:51c0:10:1203::1d include:procurios.cloud include:spf.protection.outlook.com include:_spf.transip.email ip4:199.127.232.0/22 ip4:199.255.192.0/22 ip4:206.55.144.0/20 ip4:216.221.160.0/19 ip4:23.249.208.0/20 ip4:23.251.224." "0/19 ip4:24.110.64.0/18 ip4:54.240.0.0/18 ip4:54.240.64.0/18 ip4:69.169.224.0/20 ip4:76.223.128.0/19 ip4:76.223.176.0/20 ip4:104.130.122.0/23 ip4:104.130.96.0/28 ip4:141.193.32.0/23 ip4:143.55.224.0/21 ip4:143.55.232.0/22 ip4:143.55.236.0/22 ip4:146.20.11" "2.0/26 ip4:146.20.113.0/24 ip4:146.20.191.0/24 ip4:159.112.240.0/20 ip4:159.135.132.128/25 ip4:159.135.140.80/29 ip4:159.135.224.0/20 ip4:161.38.192.0/20 ip4:161.38.204.0/22 ip4:166.78.68.0/22 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22" " ip4:192.237.158.0/23 ip4:198.244.48.0/20 ip4:198.244.60.0/22 ip4:198.61.254.0/23 ip4:204.220.160.0/21 ip4:204.220.168.0/21 ip4:204.220.176.0/20 ip4:209.61.151.0/24 ip4:23.253.182.0/23 ip4:69.72.32.0/20 ip4:87.253.232.0/21 -all"43200
CAA0 iodef "mailto:hostmaster@sp.nl"300
CAA0 issue "amazon.com"300
CAA0 issue "comodoca.com"300
CAA0 issue "digicert.com; cansignhttpexchanges=yes"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "pki.goog; cansignhttpexchanges=yes"300
CAA0 issue "sectigo.com"300
CAA0 issue "ssl.com"300
CAA0 issuewild "comodoca.com"300
CAA0 issuewild "digicert.com; cansignhttpexchanges=yes"300
CAA0 issuewild "letsencrypt.org"300
CAA0 issuewild "pki.goog; cansignhttpexchanges=yes"300
CAA0 issuewild "ssl.com"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 1d, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, sectigo.com, ssl.com.