Domain report: imprimvert.fr

Registration

info

.fr country-code · SCALEWAY · expires 2028-07-05

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.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 2028-07-05 #3

The registration is valid until 2028-07-05 (622 days).
✓ Transfer locked #4

Registry status: client transfer prohibited.
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

warn

ns1.o2switch.net, ns2.o2switch.net

Nameserver	Addresses	Network (AS)	Glue
ns1.o2switch.net	109.234.160.5	AS50474 O2SWITCH - O2SWITCH SAS, FR	-
ns2.o2switch.net	109.234.161.5	AS50474 O2SWITCH - O2SWITCH SAS, FR	-

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.o2switch.net, ns2.o2switch.net.

#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.
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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
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All nameserver names under .net

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

fail

1 of 2 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns1.o2switch.net 109.234.160.5	NOERROR, 123 ms, authoritative	no	no / yes	refused	PowerDNS Authoritative Server 4.9.17 (built Aug 10 2026 00:00:00 by root@bh-centos-9.dev.cpanel.net)
ns2.o2switch.net 109.234.161.5	no response	no	no / no	-	-

✗

Nameservers not responding

These addresses did not answer, so resolvers waste time on timeouts: ns2.o2switch.net (109.234.161.5): read udp 46.225.38.91:34676->109.234.161.5:53: i/o timeout.

#14
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.o2switch.net: "PowerDNS Authoritative Server 4.9.17 (built Aug 10 2026 00:00:00 by root@bh-centos-9.dev.cpanel.net)". Hide or replace the version string.

#17
✓ Zone transfers refused #18

No nameserver allows a zone transfer to the public.
✗

No DNS over TCP

DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.o2switch.net (109.234.160.5): dial tcp 109.234.160.5:53: i/o timeout.

#19
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

pass

serial 2026082802 · primary ns1.o2switch.net

✓ Serial 2026082802 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 30m, expire 14d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns1.o2switch.net is one of the listed nameservers.
✓ Contact sysadmin@o2switch.fr #25

The SOA RNAME sysadmin.o2switch.fr means sysadmin@o2switch.fr.
✓ Date-based serial #26

The serial 2026082802 follows the YYYYMMDDnn convention (2026-08-28).

warn

Not signed

info

2 records at the apex

Type	Value	TTL
SOA	ns1.o2switch.net. sysadmin.o2switch.fr. 2026082802 3600 1800 1209600 86400	86400
MX	0 mail.imprimvert.fr.	14400