Domain report: 2doc.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/2doc.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/2doc.nl returned HTTP 429

#3

Delegation

info

ns1.openprovider.nl, ns2.openprovider.be, ns3.openprovider.eu

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.openprovider.nl, ns2.openprovider.be, ns3.openprovider.eu
NS in the zone: ns1.openprovider.nl, ns2.openprovider.be, ns3.openprovider.eu

Nameserver	Addresses	Network (AS)	Glue
ns1.openprovider.nl	162.159.26.10 2400:cb00:2049:1::a29f:1a0a	AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	-
ns2.openprovider.be	162.159.27.96 2400:cb00:2049:1::a29f:1b60	AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	-
ns3.openprovider.eu	162.159.48.89 2400:cb00:2049:1::a29f:3059	AS13335 CLOUDFLARENET - Cloudflare, Inc., US AS13335 CLOUDFLARENET - Cloudflare, Inc., US	-

Checks

✓ 3 nameservers #6

Delegated to ns1.openprovider.nl, ns2.openprovider.be, ns3.openprovider.eu.
✓ 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.
i

One address family in one network

all IPv6 addresses are in 2400:cb00:2049::/48, while the other address family is spread over several networks.

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS13335 (CLOUDFLARENET - Cloudflare, Inc., US): 6 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 3 TLDs #12

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

Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.openprovider.nl 162.159.26.10	NOERROR, 29 ms, authoritative	no	yes / yes	refused	2026.10.8
ns1.openprovider.nl 2400:cb00:2049:1::a29f:1a0a	NOERROR, 29 ms, authoritative	no	yes / yes	refused	2026.10.8
ns2.openprovider.be 162.159.27.96	NOERROR, 30 ms, authoritative	no	yes / yes	refused	2026.10.8
ns2.openprovider.be 2400:cb00:2049:1::a29f:1b60	NOERROR, 31 ms, authoritative	no	yes / yes	refused	2026.10.8
ns3.openprovider.eu 162.159.48.89	NOERROR, 31 ms, authoritative	no	yes / yes	refused	2026.10.8
ns3.openprovider.eu 2400:cb00:2049:1::a29f:3059	NOERROR, 43 ms, authoritative	no	yes / yes	refused	2026.10.8

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.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.openprovider.nl: "2026.10.8"; ns2.openprovider.be: "2026.10.8"; ns3.openprovider.eu: "2026.10.8". 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 2026030402 · primary ns1.openprovider.nl

Found

Primary (MNAME): ns1.openprovider.nl
Contact (RNAME): dns.openprovider.eu
Serial: 2026030402
Refresh / retry: 10800 s / 3600 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
ns1.openprovider.nl (162.159.26.10)	2026030402
ns1.openprovider.nl (2400:cb00:2049:1::a29f:1a0a)	2026030402
ns2.openprovider.be (162.159.27.96)	2026030402
ns2.openprovider.be (2400:cb00:2049:1::a29f:1b60)	2026030402
ns3.openprovider.eu (162.159.48.89)	2026030402
ns3.openprovider.eu (2400:cb00:2049:1::a29f:3059)	2026030402

Checks

✓ Serial 2026030402 everywhere #22

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

SOA refresh 3h, retry 1h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver ns1.openprovider.nl is one of the listed nameservers.
✓ Contact dns@openprovider.eu #25

The SOA RNAME dns.openprovider.eu means dns@openprovider.eu.
✓ Date-based serial #26

The serial 2026030402 follows the YYYYMMDDnn convention (2026-03-04).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 1 iterations, 1-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
57700	RSASHA256 (8)	SHA256 4A5C3889B4C8DEF2…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
42360	ZSK (256)	RSASHA256 (8)
57700	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 57700 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 00:00 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 1 iteration and a 1-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

12 records at the apex

Found

Read from: 162.159.26.10:53

Type	Value	TTL
SOA	ns1.openprovider.nl. dns.openprovider.eu. 2026030402 10800 3600 604800 3600	86400
NS	ns1.openprovider.nl.	86400
NS	ns2.openprovider.be.	86400
NS	ns3.openprovider.eu.	86400
A	216.150.1.1	900
MX	32 mx1.mail.omroep.nl.	86400
MX	32 mx0.mail.omroep.nl.	86400
MX	64 mx3.mail.omroep.nl.	86400
MX	32 mx2.mail.omroep.nl.	86400
TXT	"facebook-domain-verification=qtubh383831p7h7gpjapmjz64clmk2"	900
TXT	"google-site-verification=nFaCOtB58IiptCdTtu_2B0nj2mUCK8jnf7zeOtm9Tbw"	900
TXT	"v=spf1 mx a ~all"	900

Checks

✓ TTLs within range #32

TTLs: A 15m, 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