Domain report: platform31.nl

Registration

info

.nl country-code

Found

TLD: .nl (country-code)
ICANN policies apply: no

Lookup error: https://rdap.sidn.nl/domain/platform31.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/platform31.nl returned HTTP 429

#3

Delegation

pass

ns1.leaseweb.nl, ns4.leaseweb.net, ns5.leaseweb.nl

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.leaseweb.nl, ns4.leaseweb.net, ns5.leaseweb.nl
NS in the zone: ns1.leaseweb.nl, ns4.leaseweb.net, ns5.leaseweb.nl

Nameserver	Addresses	Network (AS)	Glue
ns1.leaseweb.nl	23.19.196.53 2607:f5b5::53	AS7203 LEASEWEB-USA-SFO - Leaseweb USA, Inc., US AS28753 LEASEWEB-DE-FRA-10 - Leaseweb Deutschland GmbH, DE	23.19.196.53 2607:f5b5::53
ns4.leaseweb.net	23.19.196.53 2607:f5b5::53	AS7203 LEASEWEB-USA-SFO - Leaseweb USA, Inc., US AS28753 LEASEWEB-DE-FRA-10 - Leaseweb Deutschland GmbH, DE	-
ns5.leaseweb.nl	23.19.197.53 2607:f5b5:1::53	AS7203 LEASEWEB-USA-SFO - Leaseweb USA, Inc., US AS28753 LEASEWEB-DE-FRA-10 - Leaseweb Deutschland GmbH, DE	23.19.197.53 2607:f5b5:1::53

Checks

✓ 3 nameservers #6

Delegated to ns1.leaseweb.nl, ns4.leaseweb.net, ns5.leaseweb.nl.
✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS28753 (LEASEWEB-DE-FRA-10 - Leaseweb Deutschland GmbH, DE): 3 addresses; AS7203 (LEASEWEB-USA-SFO - Leaseweb USA, Inc., US): 3 addresses.
✓ Nameserver names under 2 TLDs #12

Nameserver names use the TLDs .net, .nl.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.leaseweb.nl 23.19.196.53	NOERROR, 5 ms, authoritative	no	yes / yes	refused	-
ns1.leaseweb.nl 2607:f5b5::53	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns4.leaseweb.net 23.19.196.53	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns4.leaseweb.net 2607:f5b5::53	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns5.leaseweb.nl 23.19.197.53	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns5.leaseweb.nl 2607:f5b5:1::53	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-

Checks

✓ All respond #14

All 6 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

info

serial 2022092100 · primary ns0.leaseweb.com

Found

Primary (MNAME): ns0.leaseweb.com
Contact (RNAME): postmaster.leaseweb.com
Serial: 2022092100
Refresh / retry: 10800 s / 3600 s
Expire: 1209600 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.leaseweb.nl (23.19.196.53)	2022092100
ns1.leaseweb.nl (2607:f5b5::53)	2022092100
ns4.leaseweb.net (23.19.196.53)	2022092100
ns4.leaseweb.net (2607:f5b5::53)	2022092100
ns5.leaseweb.nl (23.19.197.53)	2022092100
ns5.leaseweb.nl (2607:f5b5:1::53)	2022092100

Checks

✓ Serial 2022092100 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 3h, retry 1h, expire 14d, negative TTL 1h.
i

Hidden master

The primary nameserver ns0.leaseweb.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact postmaster@leaseweb.com #25

The SOA RNAME postmaster.leaseweb.com means postmaster@leaseweb.com.
✓ Date-based serial #26

The serial 2022092100 follows the YYYYMMDDnn convention (2022-09-21).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 5 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
1579	ECDSAP256SHA256 (13)	SHA256 285AF8D522D8ACF1…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
1579	KSK (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 1579 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-05 #30

The earliest DNSKEY/SOA signature expires at 2026-11-05 00:00 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

10 records at the apex

Found

Read from: 23.19.196.53:53

Type	Value	TTL
SOA	ns0.leaseweb.com. postmaster.leaseweb.com. 2022092100 10800 3600 1209600 3600	300
NS	ns1.leaseweb.nl.	43200
NS	ns4.leaseweb.net.	43200
NS	ns5.leaseweb.nl.	43200
A	87.233.198.116	300
MX	0 platform31-nl.mail.protection.outlook.com.	300
TXT	"MS=ms20541470"	300
TXT	"0gYRCqrfKoH+brSSu7sfTNTipbcl/rGoK8kYkuwsUyU/k7lCXjTj/8yfvBZXI0jqlffekUsFbExsiguPwA16wg=="	300
TXT	"google-site-verification=Q-Mx61CCf8My_NkuI33_rmnff0FLdWZrFEw4BCQUMNA"	300
TXT	"v=spf1 a mx ip4:91.231.6.241 ip4:91.231.6.242 ip4:91.231.6.243 ip4:91.231.6.244 include:mailplus.nl include:spf.protection.outlook.com include:spf.mandrillapp.com include:servers.mcsv.net include:_spf.psm.knowbe4.com ~all"	300

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 5m, NS 12h. The NS TTL at the parent is 1h and in the zone 12h; 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