Domain report: inburgeren.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

ns1.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, ns3.surfnet.nl

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, ns3.surfnet.nl
NS in the zone: ns1.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, ns3.surfnet.nl

Nameserver	Addresses	Network (AS)	Glue
ns1.surfnet.nl	192.87.106.101 2001:610:1:800a:192:87:106:101	AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL	192.87.106.101 2001:610:1:800a:192:87:106:101
ns1.zurich.surf.net	195.176.255.9 2001:620:0:9::1103	AS559 Switch - SWITCH, CH AS559 Switch - SWITCH, CH	-
ns2.surfnet.nl	192.87.36.2 2001:610:3:200a:192:87:36:2	AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL	192.87.36.2 2001:610:3:200a:192:87:36:2
ns3.surfnet.nl	195.169.124.71 2001:610:0:800c:195:169:124:71	AS1103 SURFNET-NL - SURF B.V., NL AS1103 SURFNET-NL - SURF B.V., NL	195.169.124.71 2001:610:0:800c:195:169:124:71

Checks

✓ 4 nameservers #6

Delegated to ns1.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, ns3.surfnet.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 4 IPv4 /24s and 4 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS1103 (SURFNET-NL - SURF B.V., NL): 6 addresses; AS559 (Switch - SWITCH, CH): 2 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

info

8 of 8 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.surfnet.nl 192.87.106.101	NOERROR, 10 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl
ns1.surfnet.nl 2001:610:1:800a:192:87:106:101	NOERROR, 9 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl
ns1.zurich.surf.net 195.176.255.9	NOERROR, 9 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surf.nl
ns1.zurich.surf.net 2001:620:0:9::1103	NOERROR, 10 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surf.nl
ns2.surfnet.nl 192.87.36.2	NOERROR, 12 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl
ns2.surfnet.nl 2001:610:3:200a:192:87:36:2	NOERROR, 12 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl
ns3.surfnet.nl 195.169.124.71	NOERROR, 10 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl
ns3.surfnet.nl 2001:610:0:800c:195:169:124:71	NOERROR, 10 ms, authoritative	no	yes / yes	refused	This is a SURFnet nameserver - dns-beheer@surfnet.nl

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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: ns1.surfnet.nl: "This is a SURFnet nameserver - dns-beheer@surfnet.nl"; ns1.zurich.surf.net: "This is a SURFnet nameserver - dns-beheer@surf.nl"; ns2.surfnet.nl: "This is a SURFnet nameserver - dns-beheer@surfnet.nl"; ns3.surfnet.nl: "This is a SURFnet nameserver - dns-beheer@surfnet.nl".

#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 2025048338 · primary ns1.surfnet.nl

Found

Primary (MNAME): ns1.surfnet.nl
Contact (RNAME): postmaster.duo.nl
Serial: 2025048338
Refresh / retry: 28800 s / 2880 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
ns1.surfnet.nl (192.87.106.101)	2025048338
ns1.surfnet.nl (2001:610:1:800a:192:87:106:101)	2025048338
ns1.zurich.surf.net (195.176.255.9)	2025048338
ns1.zurich.surf.net (2001:620:0:9::1103)	2025048338
ns2.surfnet.nl (192.87.36.2)	2025048338
ns2.surfnet.nl (2001:610:3:200a:192:87:36:2)	2025048338
ns3.surfnet.nl (195.169.124.71)	2025048338
ns3.surfnet.nl (2001:610:0:800c:195:169:124:71)	2025048338

Checks

✓ Serial 2025048338 everywhere #22

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

SOA refresh 8h, retry 48m, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns1.surfnet.nl is one of the listed nameservers.
✓ Contact postmaster@duo.nl #25

The SOA RNAME postmaster.duo.nl means postmaster@duo.nl.
✓ Timestamp serial #26

The serial 2025048338 is a Unix timestamp (2034-03-04 01:25 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 10 iterations, 8-byte salt
Signatures valid until: 26 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
11492	RSASHA256 (8)	SHA256 937E3C37FA4A243A…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
42616	ZSK (256)	RSASHA256 (8)
11492	KSK (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 11492 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Short-lived signatures (online signing) #30

Signatures are valid for 97h0m0s and created on demand; the current one was made at 2026-10-22 06:38 UTC and expires at 2026-10-26 07:22 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 10 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

Records

info

16 records at the apex

Found

Read from: 192.87.106.101:53

Type	Value	TTL
SOA	ns1.surfnet.nl. postmaster.duo.nl. 2025048338 28800 2880 604800 86400	86400
NS	ns2.surfnet.nl.	86400
NS	ns3.surfnet.nl.	86400
NS	ns1.zurich.surf.net.	86400
NS	ns1.surfnet.nl.	86400
A	194.171.77.165	86400
AAAA	2001:67c:262c:860::165	86400
MX	0 .	86400
TXT	"_rs68b6ztn9tndcmgroxxl8yaactnjtp"	86400
TXT	"QuoVadis=eab1c23a-a208-40b6-baf2-8807cd34d5f8."	86400
TXT	"inDmyf2IpAgAidMcse5ohq1pLslj7TM62U9TVuOw58kVpaTLGtQEMq25PYFE9NNr"	86400
TXT	"zI6m642agGQwzY2YnKbizMUAWWkjA5KaOJou5oHYPly5E742O7CxgzlwEpFF8Kk6"	86400
TXT	"v=spf1 redirect=_spf.duo.nl"	86400
TXT	"google-site-verification=--Nlxe7iRjHeZbjy1GDwKfud70F7iZ2Rt8DIBfJKkiU"	86400
TXT	"_j8qms5uhmsq24t2of2l9b0rpvhfrp9x"	86400
TXT	"QuoVadis=0dded543-0e8b-40e6-acac-1580103d9363"	86400

Checks

✓ TTLs within range #32

TTLs: A 1d, AAAA 1d, 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.
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