Domain report: nhg.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

pass

nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net
NS in the zone: nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net

Nameserver	Addresses	Network (AS)	Glue
nsauth1.introweb.nl	80.65.96.48 2001:1690:1:a::a	AS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL	80.65.96.48 2001:1690:1:a::a
nsauth2.introweb.nl	86.105.160.91 2a0d:8600:1::5a	AS205185 DCSPINE - Eurofiber Cloud Infra B.V., NL AS205185 DCSPINE - Eurofiber Cloud Infra B.V., NL	86.105.160.91 2a0d:8600:1::5a
nsauth3.introweb.net	62.165.127.221 2001:1690:1:c::a	AS20847 PREVIDER-AS - Previder B.V., NL AS20847 PREVIDER-AS - Previder B.V., NL	-

Checks

✓ 3 nameservers #6

Delegated to nsauth1.introweb.nl, nsauth2.introweb.nl, nsauth3.introweb.net.
✓ 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 3 IPv4 /24s and 2 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS205185 (DCSPINE - Eurofiber Cloud Infra B.V., NL): 2 addresses; AS20847 (PREVIDER-AS - Previder B.V., NL): 4 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

warn

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
nsauth1.introweb.nl 80.65.96.48	NOERROR, 10 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups
nsauth1.introweb.nl 2001:1690:1:a::a	NOERROR, 12 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups
nsauth2.introweb.nl 86.105.160.91	NOERROR, 13 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups
nsauth2.introweb.nl 2a0d:8600:1::5a	NOERROR, 13 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups
nsauth3.introweb.net 62.165.127.221	NOERROR, 11 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups
nsauth3.introweb.net 2001:1690:1:c::a	NOERROR, 11 ms, authoritative	no	yes / yes	refused	PowerDNS 3.11 for Workgroups

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: nsauth1.introweb.nl: "PowerDNS 3.11 for Workgroups"; nsauth2.introweb.nl: "PowerDNS 3.11 for Workgroups"; nsauth3.introweb.net: "PowerDNS 3.11 for Workgroups". 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 2022111101 · primary nsauth1.introweb.nl

Found

Primary (MNAME): nsauth1.introweb.nl
Contact (RNAME): postmaster.introweb.nl
Serial: 2022111101
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
nsauth1.introweb.nl (80.65.96.48)	2022111101
nsauth1.introweb.nl (2001:1690:1:a::a)	2022111101
nsauth2.introweb.nl (86.105.160.91)	2022111101
nsauth2.introweb.nl (2a0d:8600:1::5a)	2022111101
nsauth3.introweb.net (62.165.127.221)	2022111101
nsauth3.introweb.net (2001:1690:1:c::a)	2022111101

Checks

✓ Serial 2022111101 everywhere #22

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

SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver nsauth1.introweb.nl is one of the listed nameservers.
✓ Contact postmaster@introweb.nl #25

The SOA RNAME postmaster.introweb.nl means postmaster@introweb.nl.
✓ Date-based serial #26

The serial 2022111101 follows the YYYYMMDDnn convention (2022-11-11).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 29 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
63051	ECDSAP256SHA256 (13)	SHA256 4F01E23312B21650…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
63051	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 63051 (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.
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

pass

27 records at the apex

Found

Read from: 80.65.96.48:53

Type	Value	TTL
SOA	nsauth1.introweb.nl. postmaster.introweb.nl. 2022111101 28800 7200 604800 86400	3600
NS	nsauth1.introweb.nl.	3600
NS	nsauth3.introweb.net.	3600
NS	nsauth2.introweb.nl.	3600
A	162.159.140.127	300
MX	0 nhg-nl.q-v1.mx.microsoft.	300
TXT	"_acme-challenge.www.werkenbij.nhg.nl"	300
TXT	"d365mktkey=24DmXMoqlSZNUS4ZdKISlzb3oGQj4PUiGc98T9GRd8Ax"	300
TXT	"d365mktkey=25kt6AVzPhLktwZiRf1QLkRkZdqLxWTAblBr6oTEUKwx"	300
TXT	"d365mktkey=BPxLXmKH4807fOYD9fV11iW8wt9m2SfSaYOoKiuWExEx"	300
TXT	"d365mktkey=ES2jBnTgGecwn1VpSlvblxzDoXdpX8yI5Bbk5U0Gbt8x"	300
TXT	"v=spf1 include:spf.protection.outlook.com ip4:46.31.48.0/21 ip4:213.154.238.81 ip4:51.105.196.149 ip4:52.157.104.46 ip4:82.94.167.224 ip4:82.94.240.112/28 ip4:87.251.53.86 ip4:52.58.42.15 ip4:35.157.102.14 ip4:35.156.112.28 ip4:52.18.10.62 ip4:52.208.39.9" "9 ip4:84.247.9.119 ip4:99.80.177.69 include:spf.topdesk.net include:spf.afas.online include:creditcloud.nl a:bulkmail.marketresponse.nl a:mx10.monitoring.sps.nl -all"	300
TXT	"google-site-verification=tYWdYbNdlheBff84QgTt7N3zl240wu21_QJTbdIjp8Y"	300
TXT	"d365mktkey=xcVwaB3EB4KohfhMlVVPqOxAd0xpZIsmDZJabPxnxU0x"	300
TXT	"d365mktkey=bl1LIDq8MauECxGusqxzGGJAVAme94gGjXycRWbWhd8x"	300
TXT	"d365mktkey=0VnGBHoiBhriPKcKBREUIrBLoVRkCKVAbp38LcEiubEx"	300
TXT	"MS=ms36538690"	300
TXT	"_acme-challenge.dmtdatabricks"	300
TXT	"d365mktkey=cRcWpzQawYepYiV6ZiSuxMTixsvmyNDxumwaRsUxYOcx"	300
TXT	"atlassian-domain-verification=44QHpCzSysD8ZPEdnahD1EMHoXNbR8nL671XUh6T+cadOX70tobEbhQJUo62C7bG"	300
TXT	"d365mktkey=wLxcCV3yYYs2NLTpT4W6a9Geopmtdb3OZ8je1BFsONMx"	300
TXT	"_acme-challenge.werkenbij.nhg.nl"	300
CAA	0 issue "letsencrypt.org"	600
CAA	0 issue "comodoca.com"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "pki.goog"	360
CAA	0 issue "thawte.com"	3600

Checks

✓ TTLs within range #32

TTLs: A 5m, MX 5m, NS 1h.
✓ 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: letsencrypt.org, comodoca.com, sectigo.com, pki.goog, thawte.com.