Domain report: nluug.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

ns1.protag.io, ns2.procolix.eu, ns3.protagio.org

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns1.protag.io, ns2.procolix.eu, ns3.protagio.org
NS in the zone: ns1.protag.io, ns2.procolix.eu, ns3.protagio.org

Nameserver	Addresses	Network (AS)	Glue
ns1.protag.io	77.222.74.19 2001:1540:403::6	AS15830 Equinix - Equinix (EMEA) Acquisition Enterprises B.V., NL AS15830 Equinix - Equinix (EMEA) Acquisition Enterprises B.V., NL	-
ns2.procolix.eu	95.215.185.237 2a00:51c0::5fd7:b9ed	AS51758 Procolix - ProcoliX B.V., NL AS51758 Procolix - ProcoliX B.V., NL	-
ns3.protagio.org	95.215.185.238 2a00:51c0::5fd7:b9ee	AS51758 Procolix - ProcoliX B.V., NL AS51758 Procolix - ProcoliX B.V., NL	-

Checks

✓ 3 nameservers #6

Delegated to ns1.protag.io, ns2.procolix.eu, ns3.protagio.org.
✓ 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: AS15830 (Equinix - Equinix (EMEA) Acquisition Enterprises B.V., NL): 2 addresses; AS51758 (Procolix - ProcoliX B.V., NL): 4 addresses.
✓ Nameserver names under 3 TLDs #12

Nameserver names use the TLDs .eu, .io, .org.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.protag.io 77.222.74.19	NOERROR, 10 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns1.protag.io 2001:1540:403::6	NOERROR, 11 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns2.procolix.eu 95.215.185.237	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns2.procolix.eu 2a00:51c0::5fd7:b9ed	NOERROR, 12 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns3.protagio.org 95.215.185.238	NOERROR, 10 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/
ns3.protagio.org 2a00:51c0::5fd7:b9ee	NOERROR, 11 ms, authoritative	no	yes / yes	refused	Served by PowerDNS - https://www.powerdns.com/

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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: ns1.protag.io: "Served by PowerDNS - https://www.powerdns.com/"; ns2.procolix.eu: "Served by PowerDNS - https://www.powerdns.com/"; ns3.protagio.org: "Served by PowerDNS - https://www.powerdns.com/".

#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 2026101501 · primary ns2.procolix.eu

Found

Primary (MNAME): ns2.procolix.eu
Contact (RNAME): beheer.procolix.com
Serial: 2026101501
Refresh / retry: 1200 s / 60 s
Expire: 604800 s
Negative TTL: 1200 s

Serial per nameserver

Nameserver	Serial
ns1.protag.io (77.222.74.19)	2026101501
ns1.protag.io (2001:1540:403::6)	2026101501
ns2.procolix.eu (95.215.185.237)	2026101501
ns2.procolix.eu (2a00:51c0::5fd7:b9ed)	2026101501
ns3.protagio.org (95.215.185.238)	2026101501
ns3.protagio.org (2a00:51c0::5fd7:b9ee)	2026101501

Checks

✓ Serial 2026101501 everywhere #22

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

SOA refresh 20m, retry 1m, expire 7d, negative TTL 20m.
✓ Primary is a public nameserver #24

The primary nameserver ns2.procolix.eu is one of the listed nameservers.
✓ Contact beheer@procolix.com #25

The SOA RNAME beheer.procolix.com means beheer@procolix.com.
✓ Date-based serial #26

The serial 2026101501 follows the YYYYMMDDnn convention (2026-10-15).

DNSSEC

pass

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 0 iterations, 0-byte salt
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
51723	ECDSAP256SHA256 (13)	SHA256 7936E90EC35588FC…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
51723	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 51723 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-10-29 #30

The earliest DNSKEY/SOA signature expires at 2026-10-29 00:00 UTC.
✓ NSEC3 as recommended #31

The zone uses NSEC3 with 0 iterations and no salt (RFC 9276).

Records

info

18 records at the apex

Found

Read from: 77.222.74.19:53

Type	Value	TTL
SOA	ns2.procolix.eu. beheer.procolix.com. 2026101501 1200 60 604800 1200	3600
NS	ns3.protagio.org.	86400
NS	ns2.procolix.eu.	86400
NS	ns1.protag.io.	86400
A	185.206.232.64	3600
AAAA	2a00:51c0:12:1201::34	3600
MX	10 smtp2.protagio.nl.	3600
MX	10 smtp1.protagio.nl.	3600
TXT	"P.O. Box 8189, 6170 AD Ede, The Netherlands"	3600
TXT	"NLUUG - Open Standards and Open Systems"	3600
TXT	"google-site-verification=RYoSqYKiGRp9YsIbtmx_l5IWUq9sWCEpQa5dvvoPw1A"	3600
TXT	"Xku_ApQDy4vMfZALD13NGM-xjwXZqT86GckF-gSMvAQ"	3600
TXT	"v=spf1 mx a include:_spf.protagio.nl -all"	3600
CAA	0 issue "buypass.no"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issuewild "letsencrypt.org"	3600
CAA	0 issuewild "sectigo.com"	3600

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.
i

Wildcard record

A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.

#34
✓ CAA restricts issuance #35

Certificates may be issued by: buypass.no, sectigo.com, letsencrypt.org.