Domain report: sra.nl

Registration

info

.nl country-code

Found

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

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

#3

Delegation

info

dns-pri.box.nl, dns-sec.box.nl, dns-ter.box.nl

Found

Parent zone: nl
Delegation from: ns1.dns.nl (194.0.28.53)
NS at the parent: dns-pri.box.nl, dns-sec.box.nl, dns-ter.box.nl
NS in the zone: dns-pri.box.nl, dns-sec.box.nl, dns-ter.box.nl

Nameserver	Addresses	Network (AS)	Glue
dns-pri.box.nl	217.119.0.248 2a02:29b0::248	AS16298 INTERBOX-AS - Lubbers Box Telematica BV, NL AS16298 INTERBOX-AS - Lubbers Box Telematica BV, NL	217.119.0.248 2a02:29b0::248
dns-sec.box.nl	217.119.4.248 2a02:29b0::4:248	AS16298 INTERBOX-AS - Lubbers Box Telematica BV, NL AS16298 INTERBOX-AS - Lubbers Box Telematica BV, NL	217.119.4.248 2a02:29b0::4:248
dns-ter.box.nl	212.114.109.156 2001:7b8:60c:1:4:48:4a:1	AS12859 NL-BIT - BIT BV, NL AS12859 NL-BIT - BIT BV, NL	212.114.109.156 2001:7b8:60c:1:4:48:4a:1

Checks

✓ 3 nameservers #6

Delegated to dns-pri.box.nl, dns-sec.box.nl, dns-ter.box.nl.
✓ 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: AS12859 (NL-BIT - BIT BV, NL): 2 addresses; AS16298 (INTERBOX-AS - Lubbers Box Telematica BV, NL): 4 addresses.
i

All nameserver names under .nl

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

pass

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns-pri.box.nl 217.119.0.248	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
dns-pri.box.nl 2a02:29b0::248	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
dns-sec.box.nl 217.119.4.248	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
dns-sec.box.nl 2a02:29b0::4:248	NOERROR, 11 ms, authoritative	no	yes / yes	refused	-
dns-ter.box.nl 212.114.109.156	NOERROR, 13 ms, authoritative	no	yes / yes	refused	-
dns-ter.box.nl 2001:7b8:60c:1:4:48:4a:1	NOERROR, 12 ms, authoritative	no	yes / yes	refused	-

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.
✓ 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 1791070380 · primary dns-pri.box.nl

Found

Primary (MNAME): dns-pri.box.nl
Contact (RNAME): noc.box.nl
Serial: 1791070380
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
dns-pri.box.nl (217.119.0.248)	1791070380
dns-pri.box.nl (2a02:29b0::248)	1791070380
dns-sec.box.nl (217.119.4.248)	1791070380
dns-sec.box.nl (2a02:29b0::4:248)	1791070380
dns-ter.box.nl (212.114.109.156)	1791070380
dns-ter.box.nl (2001:7b8:60c:1:4:48:4a:1)	1791070380

Checks

✓ Serial 1791070380 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 dns-pri.box.nl is one of the listed nameservers.
✓ Contact noc@box.nl #25

The SOA RNAME noc.box.nl means noc@box.nl.
✓ Timestamp serial #26

The serial 1791070380 is a Unix timestamp (2026-10-03 23:33 UTC).

DNSSEC

warn

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC3
NSEC3: 10 iterations, 8-byte salt
Signatures valid until: 2 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
20262	ECDSAP256SHA256 (13)	SHA256 E76C3130762AFB53…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
51968	KSK (257)	ECDSAP256SHA256 (13)
20262	ZSK (256)	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 20262 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-02 #30

The earliest DNSKEY/SOA signature expires at 2026-11-02 22:32 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 10 iterations and a 8-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

16 records at the apex

Found

Read from: 217.119.0.248:53

Type	Value	TTL
SOA	dns-pri.box.nl. noc.box.nl. 1791070380 28800 7200 604800 86400	86400
NS	dns-ter.box.nl.	86400
NS	dns-sec.box.nl.	86400
NS	dns-pri.box.nl.	86400
A	86.105.245.158	600
MX	10 mail-in.box.nl.	600
TXT	"MS=ms70369738"	600
TXT	"d365mktkey=QjgzDPo8zRm0MJp5MGu4sXbGmELpxxicRmTpkCwXISEx"	600
TXT	"YDk3O0nEI3ayDu/MPJMTLxmQOeztrBqaxMhx2ODtrkr4NPja5NVHhTSjMJelbRgFOCu2rVRvPnMEkd6LUutiUQ=="	600
TXT	"google-site-verification=ssLfiV76LUD7KcQkGCbQGHG_rhwX6YJOXsDlowHHfK8"	600
TXT	"d365mktkey=9ohOJzqSfeArFJxzIvPHMmEzmceYn8fvSMKFbIva7bgx"	600
TXT	"v=spf1 include:spf1.sra.nl include:spf2.sra.nl include:sendgrid.net include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.cobytes.email ~all"	600
CAA	0 iodef "mailto:noc@box.nl"	600
CAA	0 issue "letsencrypt.org"	600
CAA	0 issue "digicert.com"	600
CAA	0 issue "sectigo.com"	600

Checks

✓ TTLs within range #32

TTLs: A 10m, MX 10m, 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: letsencrypt.org, digicert.com, sectigo.com.