obs-vlfr.fr

Checked 22 October 2026, 04:36 UTC · via 8.8.8.8
!Passed with warnings
25 passed 1 warning 0 failed 5 info

Registration

info

.fr country-code · GIP RENATER · expires 2026-12-31

Found

TLD
.fr (country-code)
ICANN policies apply
no
Registrar
GIP RENATER
Registered
31 December 1994
Last changed
31 January 2026
Expires
31 December 2026
Status
active
Registry nameservers
dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, ns4.cnrs.fr, shiva.jussieu.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 2026-12-31 #3
    The registration is valid until 2026-12-31 (70 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

info

dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, ns4.cnrs.fr, shiva.jussieu.fr

Found

Parent zone
fr
Delegation from
d.nic.fr (194.0.9.1)
NS at the parent
dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, ns4.cnrs.fr, shiva.jussieu.fr
NS in the zone
dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, ns4.cnrs.fr, shiva.jussieu.fr
NameserverAddressesNetwork (AS)Glue
dns1.obs-vlfr.fr193.49.112.247AS2200 FR-RENATER - Renater, FR193.49.112.247
dns2.obs-vlfr.fr193.49.112.246AS2200 FR-RENATER - Renater, FR193.49.112.246
ns4.cnrs.fr195.220.197.11 2001:660:500a:2210::11AS2200 FR-RENATER - Renater, FR AS2200 FR-RENATER - Renater, FR-
shiva.jussieu.fr134.157.0.129AS1307 UNSPECIFIED - Renater, EU134.157.0.129

Checks

  • ✓ 4 nameservers #6
    Delegated to dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, ns4.cnrs.fr, shiva.jussieu.fr.
  • ✓ 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: dns1.obs-vlfr.fr, dns2.obs-vlfr.fr.
  • ✓ 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 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS1307 (UNSPECIFIED - Renater, EU): 1 address; AS2200 (FR-RENATER - Renater, FR): 4 addresses.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns1.obs-vlfr.fr, dns2.obs-vlfr.fr, shiva.jussieu.fr.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.obs-vlfr.fr 193.49.112.247NOERROR, 27 ms, authoritativenoyes / yesrefusedhidden
dns2.obs-vlfr.fr 193.49.112.246NOERROR, 27 ms, authoritativenoyes / yesrefusedhidden
ns4.cnrs.fr 195.220.197.11NOERROR, 17 ms, authoritativenoyes / yesrefusedSECRET
ns4.cnrs.fr 2001:660:500a:2210::11NOERROR, 19 ms, authoritativenoyes / yesrefusedSECRET
shiva.jussieu.fr 134.157.0.129NOERROR, 14 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 5 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: dns1.obs-vlfr.fr: "hidden"; dns2.obs-vlfr.fr: "hidden"; ns4.cnrs.fr: "SECRET".
    #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 2026100900 · primary dns1.obs-vlfr.fr

Found

Primary (MNAME)
dns1.obs-vlfr.fr
Contact (RNAME)
dnsmaster.obs-vlfr.fr
Serial
2026100900
Refresh / retry
21600 s / 3600 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.obs-vlfr.fr (193.49.112.247)2026100900
dns2.obs-vlfr.fr (193.49.112.246)2026100900
ns4.cnrs.fr (195.220.197.11)2026100900
ns4.cnrs.fr (2001:660:500a:2210::11)2026100900
shiva.jussieu.fr (134.157.0.129)2026100900

Checks

  • ✓ Serial 2026100900 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 1h, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.obs-vlfr.fr is one of the listed nameservers.
  • ✓ Contact dnsmaster@obs-vlfr.fr #25
    The SOA RNAME dnsmaster.obs-vlfr.fr means dnsmaster@obs-vlfr.fr.
  • ✓ Date-based serial #26
    The serial 2026100900 follows the YYYYMMDDnn convention (2026-10-09).

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

16 records at the apex

Found

Read from
193.49.112.247:53
TypeValueTTL
SOAdns1.obs-vlfr.fr. dnsmaster.obs-vlfr.fr. 2026100900 21600 3600 3600000 8640086400
NSdns1.obs-vlfr.fr.86400
NSns4.cnrs.fr.86400
NSshiva.jussieu.fr.86400
NSdns2.obs-vlfr.fr.86400
A193.50.85.386400
MX10 mx1.relay.renater.fr.300
MX10 mx2.relay.renater.fr.300
TXT"HARICA-5idnbjsL2V1ivqODwG1"86400
TXT"v=spf1 ip4:193.49.112.15/32 include:spf.relay.renater.fr include:spf.partage.renater.fr ~all"86400
TXT"google-site-verification=QukSAFsTX7fdbmCxgYyKiXXetSGwQBRR50Ny_UvnQdg"86400
TXT"google-site-verification=6hJ4o6EHNtZiBrSUIIBYOjP1Ok86kZnN0kyG23paCcg"86400
CAA0 issue "letsencrypt.org"3600
CAA0 issue "harica.gr"3600
CAA0 issuewild "letsencrypt.org"3600
CAA0 issuewild "harica.gr"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 5m, 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, harica.gr.