offerte.nl

Checked 22 October 2026, 15:01 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 info

Registration

info

.nl country-code

Found

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

Delegation

info

pola.ns.cloudflare.com, walt.ns.cloudflare.com

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
pola.ns.cloudflare.com, walt.ns.cloudflare.com
NS in the zone
pola.ns.cloudflare.com, walt.ns.cloudflare.com
NameserverAddressesNetwork (AS)Glue
pola.ns.cloudflare.com172.64.32.214 173.245.58.214 108.162.192.214 2606:4700:50::adf5:3ad6 2803:f800:50::6ca2:c0d6 2a06:98c1:50::ac40:20d6AS13335 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-
walt.ns.cloudflare.com172.64.33.148 108.162.193.148 173.245.59.148 2a06:98c1:50::ac40:2194 2803:f800:50::6ca2:c194 2606:4700:58::adf5:3b94AS13335 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: pola.ns.cloudflare.com, walt.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
pola.ns.cloudflare.com 172.64.32.214NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
pola.ns.cloudflare.com 173.245.58.214NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
pola.ns.cloudflare.com 108.162.192.214NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
pola.ns.cloudflare.com 2606:4700:50::adf5:3ad6NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
pola.ns.cloudflare.com 2803:f800:50::6ca2:c0d6NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
pola.ns.cloudflare.com 2a06:98c1:50::ac40:20d6NOERROR, 20 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 172.64.33.148NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 108.162.193.148NOERROR, 17 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 173.245.59.148NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 2a06:98c1:50::ac40:2194NOERROR, 16 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 2803:f800:50::6ca2:c194NOERROR, 15 ms, authoritativenoyes / yesrefused2026.10.2
walt.ns.cloudflare.com 2606:4700:58::adf5:3b94NOERROR, 17 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: pola.ns.cloudflare.com: "2026.10.2"; walt.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 2415548393 · primary pola.ns.cloudflare.com

Found

Primary (MNAME)
pola.ns.cloudflare.com
Contact (RNAME)
dns.cloudflare.com
Serial
2415548393
Refresh / retry
10000 s / 2400 s
Expire
604800 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
pola.ns.cloudflare.com (172.64.32.214)2415548393
pola.ns.cloudflare.com (173.245.58.214)2415548393
pola.ns.cloudflare.com (108.162.192.214)2415548393
pola.ns.cloudflare.com (2606:4700:50::adf5:3ad6)2415548393
pola.ns.cloudflare.com (2803:f800:50::6ca2:c0d6)2415548393
pola.ns.cloudflare.com (2a06:98c1:50::ac40:20d6)2415548393
walt.ns.cloudflare.com (172.64.33.148)2415548393
walt.ns.cloudflare.com (108.162.193.148)2415548393
walt.ns.cloudflare.com (173.245.59.148)2415548393
walt.ns.cloudflare.com (2a06:98c1:50::ac40:2194)2415548393
walt.ns.cloudflare.com (2803:f800:50::6ca2:c194)2415548393
walt.ns.cloudflare.com (2606:4700:58::adf5:3b94)2415548393

Checks

  • ✓ Serial 2415548393 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 pola.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 2415548393 is a Unix timestamp (2046-07-18 17:39 UTC).

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

pass

33 records at the apex

Found

Read from
172.64.32.214:53
TypeValueTTL
SOApola.ns.cloudflare.com. dns.cloudflare.com. 2415548393 10000 2400 604800 18001800
NSpola.ns.cloudflare.com.86400
NSwalt.ns.cloudflare.com.86400
A188.114.96.2300
A188.114.97.2300
AAAA2a06:98c1:3120::2300
AAAA2a06:98c1:3121::2300
MX1 aspmx.l.google.com.300
MX10 aspmx2.googlemail.com.300
MX10 aspmx3.googlemail.com.300
MX5 alt1.aspmx.l.google.com.300
MX5 alt2.aspmx.l.google.com.300
TXT"Sendinblue-code:753bf0525b1763500a8c23056b5741de"300
TXT"cisco-ci-domain-verification=18755d2aaa2288ba5c10b50795450c4dfe5c8b950a68517c8e48696455bb064e"300
TXT"google-site-verification=5Hzjtxhyl5z7G-lWop787x9EcG-DAe_PreD3sIXr3Tw"300
TXT"google-site-verification=J8XiED2I7lrjfRmkSLa9x1lnACahkgTqFnmP-LHYon8"300
TXT"google-site-verification=ZEWSfCIrUIv2V0NA4qHk2aanj-T6F45Glios6_EoMok"300
TXT"google-site-verification=kg9KPxmfbhQ0LELN2n35tS7xw039WevkAMpU__jRQ14"300
TXT"google-site-verification=sF9f-ADiFfx5cDLLHnuMoUHA1ipd7lPdo2BsexXI4ls"300
TXT"google-site-verification=vUKW6z7VZHTtbzjt8doBoaRLngrh3r80Kym2aw-6Y2A"300
TXT"v=spf1 include:mailgun.org include:u13251999.wl250.sendgrid.net include:_spf.google.com include:servers.mcsv.net include:spf.sendinblue.com ~all"300
CAA0 issue "amazonaws.com"300
CAA0 issue "awstrust.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 "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 5m, 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: amazonaws.com, awstrust.com, comodoca.com, digicert.com, letsencrypt.org, pki.goog, ssl.com.