isover.de

Checked 21 October 2026, 23:00 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 3 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de 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
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

pass

nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
NS in the zone
nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com
NameserverAddressesNetwork (AS)Glue
nsa.perf1.fr81.92.94.100 2a01:c8:100::100AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR-
nsb.perf1.com81.92.95.100 2a01:c8:101::100AS20756 NAMESHIELD - NAMESHIELD SAS, FR AS20756 NAMESHIELD - NAMESHIELD SAS, FR-
nsc.perf1.com152.89.172.100 2a09:35c0:102::100AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR AS209510 NAMESHIELDGRP - NAMESHIELD SAS, FR-

Checks

  • ✓ 3 nameservers #6
    Delegated to nsa.perf1.fr, nsb.perf1.com, nsc.perf1.com.
  • ✓ 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 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20756 (NAMESHIELD - NAMESHIELD SAS, FR): 4 addresses; AS209510 (NAMESHIELDGRP - NAMESHIELD SAS, FR): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .com, .fr.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsa.perf1.fr 81.92.94.100NOERROR, 3 ms, authoritativenoyes / yesrefusedSecure
nsa.perf1.fr 2a01:c8:100::100NOERROR, 3 ms, authoritativenoyes / yesrefusedSecure
nsb.perf1.com 81.92.95.100NOERROR, 9 ms, authoritativenoyes / yesrefusedSecure
nsb.perf1.com 2a01:c8:101::100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsc.perf1.com 152.89.172.100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure
nsc.perf1.com 2a09:35c0:102::100NOERROR, 4 ms, authoritativenoyes / yesrefusedSecure

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: nsa.perf1.fr: "Secure"; nsb.perf1.com: "Secure"; nsc.perf1.com: "Secure".
    #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 2026101416 · primary nsa.perf1.fr

Found

Primary (MNAME)
nsa.perf1.fr
Contact (RNAME)
technical.nameshield.net
Serial
2026101416
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
nsa.perf1.fr (81.92.94.100)2026101416
nsa.perf1.fr (2a01:c8:100::100)2026101416
nsb.perf1.com (81.92.95.100)2026101416
nsb.perf1.com (2a01:c8:101::100)2026101416
nsc.perf1.com (152.89.172.100)2026101416
nsc.perf1.com (2a09:35c0:102::100)2026101416

Checks

  • ✓ Serial 2026101416 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 2h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver nsa.perf1.fr is one of the listed nameservers.
  • ✓ Contact technical@nameshield.net #25
    The SOA RNAME technical.nameshield.net means technical@nameshield.net.
  • ✓ Date-based serial #26
    The serial 2026101416 follows the YYYYMMDDnn convention (2026-10-14).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

pass

24 records at the apex

Found

Read from
81.92.94.100:53
TypeValueTTL
SOAnsa.perf1.fr. technical.nameshield.net. 2026101416 28800 7200 604800 720043200
NSnsc.perf1.com.86400
NSnsa.perf1.fr.86400
NSnsb.perf1.com.86400
A152.89.172.5643200
A81.92.94.5443200
A81.92.95.5543200
AAAA2a01:c8:100::5443200
AAAA2a01:c8:101::5543200
AAAA2a09:35c0:102::5643200
MX10 mxa-002c9e02.gslb.pphosted.com.43200
MX10 mxb-002c9e02.gslb.pphosted.com.43200
TXT"sending_domain1070472=7149447566a3716317fb0060c586fc90e93f918a2966dd3b296c4236e310efb9"43200
TXT"v=spf1 include:_spfout.mail.saint-gobain.com ~all"43200
TXT"hqz56n4yjmr8d051b35pg9tk689hs902"43200
TXT"pardot1070472=f4e14362a38c769d4ff3530ae94c9aa6c37e4084c2519a3359c0a28a9a2338ef"43200
TXT"tqglkwvbxstyp3yvsqmv3cxwwt4c87t6"43200
TXT"google-site-verification=_Rmi-tCJ27vDit9TKTvsbVD7C11PUUcdnUqUa6U2KFA"43200
TXT"fpt145bg2ctbn3441nbz5822tb2f6sqk"43200
TXT"4q19g73wdr5k8yddv5wlczq2qdpbw93b"43200
TXT"yyh97p8hvzf9kgvzwccdkff3zyvm7skz"43200
TXT"MS=ms54889758"43200
CAA0 issue "globalsign.com"3600
CAA0 issuewild "globalsign.com"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 12h, AAAA 12h, MX 12h, NS 1d.
  • ✓ 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: globalsign.com.