leef.nl

Checked 22 October 2026, 14:10 UTC · via 8.8.8.8
iAll checks passed
26 passed 0 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/leef.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/leef.nl returned HTTP 429
    #3

Delegation

info

ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com
NS in the zone
ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com
NameserverAddressesNetwork (AS)Glue
ns1.sectigoweb.com199.247.152.53 2620:111:8004::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns2.sectigoweb.com199.247.153.53 2620:111:8005::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns3.sectigoweb.com199.247.154.53 2620:111:8006::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-
ns4.sectigoweb.com199.247.155.53 2620:111:8007::53AS32771 DNSIMPLE - DNSimple Corporation, US AS32771 DNSIMPLE - DNSimple Corporation, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.sectigoweb.com, ns2.sectigoweb.com, ns3.sectigoweb.com, ns4.sectigoweb.com.
  • ✓ 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 (AS32771 (DNSIMPLE - DNSimple Corporation, 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
  • 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

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.sectigoweb.com 199.247.152.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns1.sectigoweb.com 2620:111:8004::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.sectigoweb.com 199.247.153.53NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns2.sectigoweb.com 2620:111:8005::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns3.sectigoweb.com 199.247.154.53NOERROR, 14 ms, authoritativenoyes / yesrefused-
ns3.sectigoweb.com 2620:111:8006::53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns4.sectigoweb.com 199.247.155.53NOERROR, 13 ms, authoritativenoyes / yesrefused-
ns4.sectigoweb.com 2620:111:8007::53NOERROR, 13 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 1663090901 · primary ns1.sectigoweb.com

Found

Primary (MNAME)
ns1.sectigoweb.com
Contact (RNAME)
admin.sectigo.com
Serial
1663090901
Refresh / retry
86400 s / 7200 s
Expire
604800 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.sectigoweb.com (199.247.152.53)1663090901
ns1.sectigoweb.com (2620:111:8004::53)1663090901
ns2.sectigoweb.com (199.247.153.53)1663090901
ns2.sectigoweb.com (2620:111:8005::53)1663090901
ns3.sectigoweb.com (199.247.154.53)1663090901
ns3.sectigoweb.com (2620:111:8006::53)1663090901
ns4.sectigoweb.com (199.247.155.53)1663090901
ns4.sectigoweb.com (2620:111:8007::53)1663090901

Checks

  • ✓ Serial 1663090901 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 7d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.sectigoweb.com is one of the listed nameservers.
  • ✓ Contact admin@sectigo.com #25
    The SOA RNAME admin.sectigo.com means admin@sectigo.com.
  • ✓ Timestamp serial #26
    The serial 1663090901 is a Unix timestamp (2022-09-13 17:41 UTC).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver
yes
Signatures valid until
14 February 2027

DS at the parent

Key tagAlgorithmDigestMatches a key
62164RSASHA256 (8)SHA256 DE189F1A23886F3D…yes

DNSKEY in the zone

Key tagRoleAlgorithm
27639ZSK (256)RSASHA256 (8)
62164KSK (257)RSASHA256 (8)

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 62164 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2027-02-14 #30
    The earliest DNSKEY/SOA signature expires at 2027-02-14 08:30 UTC.

Records

info

12 records at the apex

Found

Read from
199.247.152.53:53
TypeValueTTL
SOAns1.sectigoweb.com. admin.sectigo.com. 1663090901 86400 7200 604800 3003600
NSns1.sectigoweb.com.3600
NSns2.sectigoweb.com.3600
NSns3.sectigoweb.com.3600
NSns4.sectigoweb.com.3600
A3.125.227.191900
MX10 gw3204.fortimail.com.900
TXT"MS=ms75501841"900
TXT"google-site-verification=GD1woFBKJlY61O8Nj2K_sT2yFXzM2taXb4m36BybcgA"900
TXT"google-site-verification=KJ4_O8MhkXZ0kxCBd9oQKTT4QrkitO0rUHz23nQloyA"900
TXT"v=spf1 include:spf.mailjet.com include:_spf.leef.nl include:spf.protection.outlook.com include:spf.mosadex.hypernode.io -all"900
TXT"MS=ms36546925"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 15m, NS 1h.
  • ✓ 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