Domain report: nos.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

info

ns-1511.awsdns-60.org, ns-1582.awsdns-05.co.uk, ns-311.awsdns-38.com, ns-823.awsdns-38.net

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: ns-1511.awsdns-60.org, ns-1582.awsdns-05.co.uk, ns-311.awsdns-38.com, ns-823.awsdns-38.net
NS in the zone: ns-1511.awsdns-60.org, ns-1582.awsdns-05.co.uk, ns-311.awsdns-38.com, ns-823.awsdns-38.net

Nameserver	Addresses	Network (AS)	Glue
ns-1511.awsdns-60.org	205.251.197.231 2600:9000:5305:e700::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-1582.awsdns-05.co.uk	205.251.198.46 2600:9000:5306:2e00::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-311.awsdns-38.com	205.251.193.55 2600:9000:5301:3700::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-
ns-823.awsdns-38.net	205.251.195.55 2600:9000:5303:3700::1	AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US	-

Checks

✓ 4 nameservers #6

Delegated to ns-1511.awsdns-60.org, ns-1582.awsdns-05.co.uk, ns-311.awsdns-38.com, ns-823.awsdns-38.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 4 IPv4 /24s and 4 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 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 4 TLDs #12

Nameserver names use the TLDs .com, .net, .org, .uk.
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns-1511.awsdns-60.org 205.251.197.231	NOERROR, 3 ms, authoritative	no	yes / yes	refused	-
ns-1511.awsdns-60.org 2600:9000:5305:e700::1	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns-1582.awsdns-05.co.uk 205.251.198.46	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-1582.awsdns-05.co.uk 2600:9000:5306:2e00::1	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-311.awsdns-38.com 205.251.193.55	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-311.awsdns-38.com 2600:9000:5301:3700::1	NOERROR, 9 ms, authoritative	no	yes / yes	refused	-
ns-823.awsdns-38.net 205.251.195.55	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-
ns-823.awsdns-38.net 2600:9000:5303:3700::1	NOERROR, 4 ms, authoritative	no	yes / yes	refused	-

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.
✓ No version disclosed #17

The nameservers don't reveal their software version.
✓ 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 1 · primary ns-1511.awsdns-60.org

Found

Primary (MNAME): ns-1511.awsdns-60.org
Contact (RNAME): awsdns-hostmaster.amazon.com
Serial: 1
Refresh / retry: 7200 s / 900 s
Expire: 1209600 s
Negative TTL: 300 s

Serial per nameserver

Nameserver	Serial
ns-1511.awsdns-60.org (205.251.197.231)	1
ns-1511.awsdns-60.org (2600:9000:5305:e700::1)	1
ns-1582.awsdns-05.co.uk (205.251.198.46)	1
ns-1582.awsdns-05.co.uk (2600:9000:5306:2e00::1)	1
ns-311.awsdns-38.com (205.251.193.55)	1
ns-311.awsdns-38.com (2600:9000:5301:3700::1)	1
ns-823.awsdns-38.net (205.251.195.55)	1
ns-823.awsdns-38.net (2600:9000:5303:3700::1)	1

Checks

✓ Serial 1 everywhere #22

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

SOA refresh 2h, retry 15m, expire 14d, negative TTL 5m.
✓ Primary is a public nameserver #24

The primary nameserver ns-1511.awsdns-60.org is one of the listed nameservers.
✓ Contact awsdns-hostmaster@amazon.com #25

The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
✓ Counter serial #26

The serial 1 is a plain counter.

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 21 October 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
44332	ECDSAP256SHA256 (13)	SHA256 DF5008B1F58CEED2…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
6765	ZSK (256)	ECDSAP256SHA256 (13)
56725	ZSK (256)	ECDSAP256SHA256 (13)
44332	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 44332 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Short-lived signatures (online signing) #30

Signatures are valid for 2h0m0s and created on demand; the current one was made at 2026-10-21 20:23 UTC and expires at 2026-10-21 22:38 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

warn

29 records at the apex

Found

Read from: 205.251.197.231:53

Type	Value	TTL
SOA	ns-1511.awsdns-60.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300	900
NS	ns-1511.awsdns-60.org.	3600
NS	ns-1582.awsdns-05.co.uk.	3600
NS	ns-311.awsdns-38.com.	3600
NS	ns-823.awsdns-38.net.	3600
A	18.64.211.21	60
A	18.64.211.111	60
A	18.64.211.73	60
A	18.64.211.52	60
AAAA	2600:9000:20a2:be00:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:de00:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:aa00:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:6600:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:4a00:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:8c00:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:e600:f:425b:9b80:93a1	60
AAAA	2600:9000:20a2:d600:f:425b:9b80:93a1	60
MX	10 nos-nl.mail.protection.outlook.com.	7200
TXT	"MS=ms54114100"	300
TXT	"adobe-idp-site-verification=dffe01417958a3608575de2fe502983b43c8a959dce9e0741294b2fe00ff31b7"	300
TXT	"ahrefs-site-verification_593f5c84092841d8e877cd7383196907e8d474f3155ed146ea6fffc7cff6f78f"	300
TXT	"anthropic-domain-verification-na16s8=TfhXKjvDoFyCjn5ojodUfNFTW"	300
TXT	"apple-domain-verification=cwxV9FeBqcSiNe6L"	300
TXT	"eHt52Z91IJwRuCaG5Di9VrJXYPeu0Mi6BhWU3l5YV21/q2tOdB9oKDxfh+SdtsVtBJBgEABUcHvnqtGHf1GDNg=="	300
TXT	"google-site-verification=kPt6Gqfhcwbub0bxNVaLUy0vkDmIXgkW_NC_1qeXorM"	300
TXT	"google-site-verification=tAjb81nA-Pmw0bygOKbOfEIUheNCzYUoYpsayvQ877c"	300
TXT	"reftab-domain-verification=dc1dfdd2bf7152b1e5506238aca79276"	300
TXT	"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"	300
TXT	"zmqs769E9GnRJBLhJUlXOGi0/7LoeiUjiuW9BgbKPJOpoms+KFshyjYk1zaI2LwWCTqhI3bvasgK6avxP2/nBg=="	300

Checks

!

Very low TTLs

These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m). Low TTLs are useful just before a planned change.

#32
✓ 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