o2switch.fr

Checked 22 October 2026, 04:35 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 warnings 0 failed 6 info

Registration

info

.fr country-code · GANDI · expires 2029-09-03

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GANDI
Registered
9 May 2008
Last changed
23 July 2026
Expires
3 September 2029
Status
active
Registry nameservers
dark.o2sdns.fr, vador.o2sdns.fr
RDAP server
https://rdap.nic.fr/

Checks

  • i
    .fr 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
    .fr is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2029-09-03 #3
    The registration is valid until 2029-09-03 (1047 days).
  • i
    No transfer lock
    The domain has no transfer lock (status: active). A registrar lock protects against unauthorized transfers.
    #4
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

dark.o2sdns.fr, vador.o2sdns.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dark.o2sdns.fr, vador.o2sdns.fr
NS in the zone
dark.o2sdns.fr, vador.o2sdns.fr
NameserverAddressesNetwork (AS)Glue
dark.o2sdns.fr109.234.160.8AS50474 O2SWITCH - O2SWITCH SAS, FR-
vador.o2sdns.fr109.234.161.8AS50474 O2SWITCH - O2SWITCH SAS, FR-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dark.o2sdns.fr, vador.o2sdns.fr.
    #6
  • ✓ 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 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS50474 (O2SWITCH - O2SWITCH SAS, FR): 2 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .fr
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dark.o2sdns.fr 109.234.160.8NOERROR, 20 ms, authoritativenoyes / yesrefusedunknown
vador.o2sdns.fr 109.234.161.8NOERROR, 21 ms, authoritativenoyes / yesrefusedunknown

Checks

  • ✓ All respond #14
    All 2 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: dark.o2sdns.fr: "unknown"; vador.o2sdns.fr: "unknown".
    #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 2010032908 · primary dark.o2sdns.fr

Found

Primary (MNAME)
dark.o2sdns.fr
Contact (RNAME)
support.o2switch.fr
Serial
2010032908
Refresh / retry
86400 s / 7200 s
Expire
1728000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dark.o2sdns.fr (109.234.160.8)2010032908
vador.o2sdns.fr (109.234.161.8)2010032908

Checks

  • ✓ Serial 2010032908 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 20d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dark.o2sdns.fr is one of the listed nameservers.
  • ✓ Contact support@o2switch.fr #25
    The SOA RNAME support.o2switch.fr means support@o2switch.fr.
  • ✓ Date-based serial #26
    The serial 2010032908 follows the YYYYMMDDnn convention (2010-03-29).

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

8 records at the apex

Found

Read from
109.234.160.8:53
TypeValueTTL
SOAdark.o2sdns.fr. support.o2switch.fr. 2010032908 86400 7200 1728000 8640086400
NSvador.o2sdns.fr.86400
NSdark.o2sdns.fr.86400
A109.234.165.141320
MX0 mx.o2switch.fr.14400
TXT"google-site-verification=1Qswc16KTcDOZ4M98DGwzk0-TAKeacNMvNC-m9cEo8g"14400
TXT"v=spf1 include:spf.jabatus.fr include:spf.mailjet.com include:spf.mydomainprovider.com include:spf.crowdtech.com -all"14400
CAA0 issue "sectigo.com"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m20s, MX 4h, 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: sectigo.com.