cached probe / public landing
DNS & SSL for calibre.extinct.cz
Result is fresh (cached within the last hour).
probe.2026093019
probe result
/
calibre.extinct.cz
cached 53 minutes ago
· 6528ms
A
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [OK] | Cloudflare | 1.1.1.1 |
13.140.179.162
|
0ms |
| [OK] | Cloudflare 2 | 1.0.0.1 |
13.140.179.162
|
0ms |
| [OK] | 8.8.8.8 |
13.140.179.162
|
0ms | |
| [OK] | Google 2 | 8.8.4.4 |
13.140.179.162
|
0ms |
| [OK] | Quad9 | 9.9.9.9 |
13.140.179.162
|
0ms |
| [OK] | OpenDNS | 208.67.222.222 |
13.140.179.162
|
0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
13.140.179.162
|
197ms |
| [OK] | Yandex | 77.88.8.8 |
13.140.179.162
|
0ms |
| [OK] | Comodo | 8.26.56.26 |
;; communications error to 8.26.56.26#53: timed out
;; no servers could be reached
|
2713ms |
| [OK] | Verisign | 64.6.64.6 |
13.140.179.162
|
0ms |
| [OK] | Hurricane Electric | 74.82.42.42 |
13.140.179.162
|
0ms |
| [OK] | AdGuard | 94.140.14.14 |
13.140.179.162
|
0ms |
AAAA
record
[FAIL] missing
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [--] | DNS.Watch | 84.200.69.80 | — no answer | 0ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
MX
record
[FAIL] missing
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [--] | DNS.Watch | 84.200.69.80 | — no answer | 0ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
TXT
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
;; communications error to 84.200.69.80#53: timed out
;; no servers could be reached
|
51ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
NS
record
[FAIL] missing
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [--] | DNS.Watch | 84.200.69.80 | — no answer | 0ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
CNAME
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
;; communications error to 84.200.69.80#53: timed out
;; no servers could be reached
|
26ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
CAA
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
;; communications error to 84.200.69.80#53: timed out
;; no servers could be reached
|
14ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
SOA
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [--] | Cloudflare | 1.1.1.1 | — no answer | 0ms |
| [--] | Cloudflare 2 | 1.0.0.1 | — no answer | 0ms |
| [--] | 8.8.8.8 | — no answer | 0ms | |
| [--] | Google 2 | 8.8.4.4 | — no answer | 0ms |
| [--] | Quad9 | 9.9.9.9 | — no answer | 0ms |
| [--] | OpenDNS | 208.67.222.222 | — no answer | 0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
;; communications error to 84.200.69.80#53: timed out
;; no servers could be reached
|
21ms |
| [--] | Yandex | 77.88.8.8 | — no answer | 0ms |
| [--] | Comodo | 8.26.56.26 | — no answer | 0ms |
| [--] | Verisign | 64.6.64.6 | — no answer | 0ms |
| [--] | Hurricane Electric | 74.82.42.42 | — no answer | 0ms |
| [--] | AdGuard | 94.140.14.14 | — no answer | 0ms |
PTR
record
[WARN] partial
| STATUS | RESOLVER | IP | VALUE | LATENCY |
|---|---|---|---|---|
| [OK] | Cloudflare | 1.1.1.1 |
vmi3369436.contaboserver.net.
|
57ms |
| [OK] | Cloudflare 2 | 1.0.0.1 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | 8.8.8.8 |
vmi3369436.contaboserver.net.
|
29ms | |
| [OK] | Google 2 | 8.8.4.4 |
vmi3369436.contaboserver.net.
|
1ms |
| [OK] | Quad9 | 9.9.9.9 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | OpenDNS | 208.67.222.222 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | DNS.Watch | 84.200.69.80 |
;; communications error to 84.200.69.80#53: timed out
;; no servers could be reached
|
2948ms |
| [OK] | Yandex | 77.88.8.8 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | Comodo | 8.26.56.26 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | Verisign | 64.6.64.6 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | Hurricane Electric | 74.82.42.42 |
vmi3369436.contaboserver.net.
|
0ms |
| [OK] | AdGuard | 94.140.14.14 |
vmi3369436.contaboserver.net.
|
0ms |
TLS / SSL health
[OK] 89d left
issuer
C = US, O = Let's Encrypt, CN = YE1
subject
CN = calibre.extinct.cz
valid from
Sep 30 18:15:28 2026 GMT
valid to
Dec 29 18:15:27 2026 GMT
signature algorithm
ecdsa-with-SHA384
public key
id-ecPublicKey · 256 bit
subject alternative names (1)
calibre.extinct.cz
sha256 fingerprint
3F:42:13:C7:B1:49:41:90:F8:70:F8:81:E5:96:8D:B6:4F:AF:57:7B:68:08:D5:E9:CA:8D:9A:26:79:81:0F:E4
TLS 1.0
[OK] disabled
TLS 1.1
[OK] disabled
TLS 1.2
[OK] supported
TLS 1.3
[OK] supported
HTTP/2
[--] no
HTTP/3 (QUIC)
[--] no
HSTS
[OK] supported
max-age=31536000
OCSP stapling
[--] no
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faq / calibre.extinct.cz
How does the propagation check work for calibre.extinct.cz? →
We query 12 well-known recursive resolvers (Cloudflare, Google, Quad9, OpenDNS and others) in parallel using dig +short with a 3-second per-resolver timeout. The verdict is propagated when every resolver returns the same answer set, partial if any disagree, and missing if none answer.
How accurate is the SSL audit? →
We perform a real TLS handshake against port 443 using openssl s_client for each protocol version, then parse the leaf certificate. HTTP/2 and HTTP/3 are probed with curl. HTTP/3 may be marked as not probeable when our host's libcurl is built without nghttp3.
Why was this result cached? →
Results are cached per hour per domain to be kind to upstream resolvers and to keep this page snappy. Click re-check now to force a fresh probe.