Domain report: alternate.nl

Registration

info

.nl country-code

Found

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

Lookup error: https://rdap.sidn.nl/domain/alternate.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/alternate.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, 35 ms, authoritative	no	yes / yes	refused	2026.10.8
ns1.openprovider.nl 2400:cb00:2049:1::a29f:1a0a	NOERROR, 33 ms, authoritative	no	yes / yes	refused	2026.10.8
ns2.openprovider.be 162.159.27.96	NOERROR, 27 ms, authoritative	no	yes / yes	refused	2026.10.8
ns2.openprovider.be 2400:cb00:2049:1::a29f:1b60	NOERROR, 34 ms, authoritative	no	yes / yes	refused	2026.10.8
ns3.openprovider.eu 162.159.48.89	NOERROR, 26 ms, authoritative	no	yes / yes	refused	2026.10.8
ns3.openprovider.eu 2400:cb00:2049:1::a29f:3059	NOERROR, 26 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 2026102102 · primary ns1.openprovider.nl

Found

Primary (MNAME): ns1.openprovider.nl
Contact (RNAME): dns.openprovider.eu
Serial: 2026102102
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)	2026102102
ns1.openprovider.nl (2400:cb00:2049:1::a29f:1a0a)	2026102102
ns2.openprovider.be (162.159.27.96)	2026102102
ns2.openprovider.be (2400:cb00:2049:1::a29f:1b60)	2026102102
ns3.openprovider.eu (162.159.48.89)	2026102102
ns3.openprovider.eu (2400:cb00:2049:1::a29f:3059)	2026102102

Checks

✓ Serial 2026102102 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 2026102102 follows the YYYYMMDDnn convention (2026-10-21).

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
32065	RSASHA256 (8)	SHA256 26F575738E8F28E0…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
32065	KSK (257)	RSASHA256 (8)
31344	ZSK (256)	RSASHA256 (8)
13590	ZSK (256)	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 32065 (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

pass

24 records at the apex

Found

Read from: 162.159.26.10:53

Type	Value	TTL
SOA	ns1.openprovider.nl. dns.openprovider.eu. 2026102102 10800 3600 604800 3600	86400
NS	ns3.openprovider.eu.	86400
NS	ns2.openprovider.be.	86400
NS	ns1.openprovider.nl.	86400
A	167.235.203.151	3600
AAAA	2a01:4f8:c012:cf39::1	3600
MX	10 mx.spamexperts.com.	3600
MX	30 lastmx.spamexperts.net.	3600
MX	20 fallbackmx.spamexperts.eu.	3600
TXT	"google-site-verification=qOdGCYmmpJ7VPhV-OihaBLbHs6ArwuI8GCmdpanWHKo"	3600
TXT	"v=spf1 a:mail1.tle.de a:mail.tle.de a:mail2.tle.de ip4:94.23.165.105 ip4:91.121.25.96 ip4:217.102.252.158 ip4:212.115.198.48/29 ip6:2a02:f6c:76d:1:69::7 ip6:2a02:f6c:76d:1:69::9 ip6:2a02:f6c:76d:1:69::6 -all"	3600
TXT	"ca3-4a3e90cebcac45809cc5d9e87cdcd0e4"	3600
TXT	"MS=ms28031952"	3600
TXT	"MS=40C7169E15D80FFF2437D0E10094D9AC48894B88"	3600
TXT	"facebook-domain-verification=bgpl7ehhoqymw2m8tf4k4vvo9wxb93"	3600
TXT	"linkedin-site-verification=67cb7336-dbbf-40b9-b8e5-a70857d51568"	3600
TXT	"G5N-1T9-1YK"	3600
CAA	0 issuewild "sectigo.com"	900
CAA	0 iodef "mailto:iops@alternate.nl"	900
CAA	0 issuewild "letsencrypt.org"	900
CAA	0 issue "sectigo.com"	900
CAA	0 issue "letsencrypt.org"	900
CAA	0 issuewild "pki.goog"	900
CAA	0 issue "pki.goog"	900

Checks

✓ TTLs within range #32

TTLs: A 1h, AAAA 1h, MX 1h, 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: sectigo.com, letsencrypt.org, pki.goog.