solcon.nl

Checked 22 October 2026, 16:10 UTC · via 8.8.8.8
iAll checks passed
28 passed 0 warnings 0 failed 5 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/solcon.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/solcon.nl returned HTTP 429
    #3

Delegation

pass

nsauth01.solcon.nl, nsauth02.solcon.eu, nsauth03.solcon.net

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
nsauth01.solcon.nl, nsauth02.solcon.eu, nsauth03.solcon.net
NS in the zone
nsauth01.solcon.nl, nsauth02.solcon.eu, nsauth03.solcon.net
NameserverAddressesNetwork (AS)Glue
nsauth01.solcon.nl212.45.32.15 2001:9e0:4:32::15AS12414 NL-SOLCON - Solcon Internetdiensten B.V., NL AS12414 NL-SOLCON - Solcon Internetdiensten B.V., NL212.45.32.15 2001:9e0:4:32::15
nsauth02.solcon.eu83.247.127.15 2001:9e0:8:975::15AS12414 NL-SOLCON - Solcon Internetdiensten B.V., NL AS12414 NL-SOLCON - Solcon Internetdiensten B.V., NL-
nsauth03.solcon.net89.188.2.227 2a01:1b0:8:6::15AS31477 DUOCAST-AS - Duocast B.V., NL AS31477 DUOCAST-AS - Duocast B.V., NL-

Checks

  • ✓ 3 nameservers #6
    Delegated to nsauth01.solcon.nl, nsauth02.solcon.eu, nsauth03.solcon.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: nsauth01.solcon.nl.
  • ✓ 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 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12414 (NL-SOLCON - Solcon Internetdiensten B.V., NL): 4 addresses; AS31477 (DUOCAST-AS - Duocast B.V., NL): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .eu, .net, .nl.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsauth01.solcon.nl 212.45.32.15NOERROR, 10 ms, authoritativenoyes / yesrefusedSolcon Authorative
nsauth01.solcon.nl 2001:9e0:4:32::15NOERROR, 10 ms, authoritativenoyes / yesrefusedSolcon Authorative
nsauth02.solcon.eu 83.247.127.15NOERROR, 11 ms, authoritativenoyes / yesrefusedSolcon Authorative
nsauth02.solcon.eu 2001:9e0:8:975::15NOERROR, 11 ms, authoritativenoyes / yesrefusedSolcon Authorative
nsauth03.solcon.net 89.188.2.227NOERROR, 10 ms, authoritativenoyes / yesrefusedSolcon Authorative
nsauth03.solcon.net 2a01:1b0:8:6::15NOERROR, 10 ms, authoritativenoyes / yesrefusedSolcon Authorative

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: nsauth01.solcon.nl: "Solcon Authorative"; nsauth02.solcon.eu: "Solcon Authorative"; nsauth03.solcon.net: "Solcon Authorative".
    #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 2026113958 · primary nsauth01.solcon.nl

Found

Primary (MNAME)
nsauth01.solcon.nl
Contact (RNAME)
postmaster.solcon.nl
Serial
2026113958
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
nsauth01.solcon.nl (212.45.32.15)2026113958
nsauth01.solcon.nl (2001:9e0:4:32::15)2026113958
nsauth02.solcon.eu (83.247.127.15)2026113958
nsauth02.solcon.eu (2001:9e0:8:975::15)2026113958
nsauth03.solcon.net (89.188.2.227)2026113958
nsauth03.solcon.net (2a01:1b0:8:6::15)2026113958

Checks

  • ✓ Serial 2026113958 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 nsauth01.solcon.nl is one of the listed nameservers.
  • ✓ Contact postmaster@solcon.nl #25
    The SOA RNAME postmaster.solcon.nl means postmaster@solcon.nl.
  • ✓ Timestamp serial #26
    The serial 2026113958 is a Unix timestamp (2034-03-16 09:25 UTC).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
5 November 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
29786ECDSAP256SHA256 (13)SHA256 ED77C1358EBDA43D…yes

DNSKEY in the zone

Key tagRoleAlgorithm
29786KSK (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 29786 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 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

info

15 records at the apex

Found

Read from
212.45.32.15:53
TypeValueTTL
SOAnsauth01.solcon.nl. postmaster.solcon.nl. 2026113958 28800 7200 604800 864003600
NSnsauth03.solcon.net.3600
NSnsauth01.solcon.nl.3600
NSnsauth02.solcon.eu.3600
A185.71.62.463600
AAAA2a03:38a0:62:46::13600
MX10 mx102.solcon.nl.3600
MX10 mx103.solcon.nl.3600
MX10 mx104.solcon.nl.3600
MX10 mx101.solcon.nl.3600
TXT"google-site-verification=ynWAwzU6BfyLf8tr4it3UGtvYpS7BBphCUOSTzXf-QA"3600
TXT"teamtailor=82feaefec852634bb9487805a0c47e01"3600
TXT"_od18d4sfq7q2ju65thck4d15bbbk5lt"3600
TXT"v=spf1 ip4:46.228.136.136 include:spf.solcon.nl mx ~all"3600
TXT"facebook-domain-verification=0vf8ag437chgvzpbf8cig29vaegupn"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, AAAA 1h, MX 1h, 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.
  • 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