randstad.nl

Checked 21 October 2026, 21:24 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 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/randstad.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/randstad.nl returned HTTP 429
    #3

Delegation

info

ns-100.awsdns-12.com, ns-1444.awsdns-52.org, ns-1697.awsdns-20.co.uk, ns-708.awsdns-24.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns-100.awsdns-12.com, ns-1444.awsdns-52.org, ns-1697.awsdns-20.co.uk, ns-708.awsdns-24.net
NS in the zone
ns-100.awsdns-12.com, ns-1444.awsdns-52.org, ns-1697.awsdns-20.co.uk, ns-708.awsdns-24.net
NameserverAddressesNetwork (AS)Glue
ns-100.awsdns-12.com205.251.192.100 2600:9000:5300:6400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1444.awsdns-52.org205.251.197.164 2600:9000:5305:a400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1697.awsdns-20.co.uk205.251.198.161 2600:9000:5306:a100::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-708.awsdns-24.net205.251.194.196 2600:9000:5302:c400::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-100.awsdns-12.com, ns-1444.awsdns-52.org, ns-1697.awsdns-20.co.uk, ns-708.awsdns-24.net.
  • ✓ 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 (AS16509 (AMAZON-02 - Amazon.com, Inc., 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
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-100.awsdns-12.com 205.251.192.100NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-100.awsdns-12.com 2600:9000:5300:6400::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1444.awsdns-52.org 205.251.197.164NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1444.awsdns-52.org 2600:9000:5305:a400::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1697.awsdns-20.co.uk 205.251.198.161NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1697.awsdns-20.co.uk 2600:9000:5306:a100::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-708.awsdns-24.net 205.251.194.196NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-708.awsdns-24.net 2600:9000:5302:c400::1NOERROR, 4 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 1 · primary ns-1697.awsdns-20.co.uk

Found

Primary (MNAME)
ns-1697.awsdns-20.co.uk
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-100.awsdns-12.com (205.251.192.100)1
ns-100.awsdns-12.com (2600:9000:5300:6400::1)1
ns-1444.awsdns-52.org (205.251.197.164)1
ns-1444.awsdns-52.org (2600:9000:5305:a400::1)1
ns-1697.awsdns-20.co.uk (205.251.198.161)1
ns-1697.awsdns-20.co.uk (2600:9000:5306:a100::1)1
ns-708.awsdns-24.net (205.251.194.196)1
ns-708.awsdns-24.net (2600:9000:5302:c400::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-1697.awsdns-20.co.uk is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

DNSSEC

info

Signed, DS published at parent

Found

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

DS at the parent

Key tagAlgorithmDigestMatches a key
33692ECDSAP256SHA256 (13)SHA256 FCBB96EB242C5BEE…yes

DNSKEY in the zone

Key tagRoleAlgorithm
1203ZSK (256)ECDSAP256SHA256 (13)
17032ZSK (256)ECDSAP256SHA256 (13)
33692KSK (257)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 33692 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Short-lived signatures (online signing) #30
    Signatures are valid for 2h0m0s and created on demand; the current one was made at 2026-10-21 20:24 UTC and expires at 2026-10-21 22:39 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

33 records at the apex

Found

Read from
205.251.192.100:53
TypeValueTTL
SOAns-1697.awsdns-20.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-100.awsdns-12.com.14400
NSns-1444.awsdns-52.org.14400
NSns-1697.awsdns-20.co.uk.14400
NSns-708.awsdns-24.net.14400
A34.247.77.3360
A54.72.66.17660
MX1 aspmx.l.google.com.14400
MX10 alt3.aspmx.l.google.com.14400
MX10 alt4.aspmx.l.google.com.14400
MX5 alt1.aspmx.l.google.com.14400
MX5 alt2.aspmx.l.google.com.14400
TXT"MS=ms34017619"14400
TXT"SFMC-5oClg0gJin8APJqZqOotNLfEEnGwi-zuxcRCA4Xd"14400
TXT"SFMC-BxIKCVG-r1Zvxw7sQt0L2rH_nc_cgf9OBg5MWUgY"14400
TXT"SFMC-TyC5kFadxl1VL36JcgzPwFUIwWG3Yf6ehnmn7CVd"14400
TXT"SFMC-l60wg5CzoVVK_CQ81yMVtGitnoe9AUHHZplpIXmb"14400
TXT"SFMC-nc_I47yhWO68KhuwHRmQUFtJoRSA6J1UV967QRhG"14400
TXT"_8mxb7zibirv5w77oigcdh88ihv1zu3p"14400
TXT"_sk5jbkgfeqq224m4mldgqr5ohw7peyi"14400
TXT"_ttoncisxk1hmifrytrz3kisswqvnep2"14400
TXT"amazonses:FtY7V/e1saR1dYfjYGzlSMvGbbFLRE3oTY9xUfA1Yp0="14400
TXT"atlassian-domain-verification=k68y70oNgJC4eZeAmJIHZ2aO4iWqzW5JtiXbnPgOhgTgab/RxiEWAfW1etrnw0qy"14400
TXT"google-site-verification=7bNx1HrSZaC2cSZLOrXYueI76G_xsLef1RzT5hX1LQg"14400
TXT"google-site-verification=8nx-dWMzuurxkd7Gdjz3tqxJAzov73hxXOhgt7p-Wkk"14400
TXT"google-site-verification=LPtmMA0PkIUSI6YJxhZVy1g3wmb_rqzZrLqV-mYOKdQ"14400
TXT"google-site-verification=X0O_wiYijR_AMyETJa1udJra33h3Zeejb3KJMVaUcWM"14400
TXT"google-site-verification=pU1l7rhpZsnTi8zY7w8bzf2rDNdo_yj4PwmymeunuZQ"14400
TXT"google-site-verification=yGepN_zHPOUjsSkCGUFk0sgMjVPhuQUYSR0Gzv69Zg8"14400
TXT"google-site-verification=z9Uua_oZRL8Dbx16LtSHXyoFvPcLTxxZ8RARHLax20U"14400
TXT"linkedin-site-verification=bd3df0ab-58f9-4335-be19-6a13a850f43b"14400
TXT"p4s6tc6j0gpk76bz422r2xpx9h1xk5cb"14400
TXT"v=spf1 include:spf1.randstad.nl include:spf2.randstad.nl include:spf.formdesk.com ip4:87.233.130.51 ~all"14400

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 4h; 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.
  • 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