sfdb.cz - robtex.com

sfdb.cz

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:d4e0🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:2d64🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.45.100Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.212.224🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSadel.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a37🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRadel.ns.cloudflare.com
A2803:f800:50::6ca2:c037🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRadel.ns.cloudflare.com
A2a06:98c1:50::ac40:2037🇺🇸 Cloudflare2a06:98c1:50::/45
PTRadel.ns.cloudflare.com
A108.162.192.55🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRadel.ns.cloudflare.com
A172.64.32.55🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRadel.ns.cloudflare.com
A173.245.58.55🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRadel.ns.cloudflare.com
NSwatson.ns.cloudflare.com
A2606:4700:58::a29f:2c17🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwatson.ns.cloudflare.com
A2803:f800:50::6ca2:c317🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRwatson.ns.cloudflare.com
A2a06:98c1:50::ac40:2317🇺🇸 Cloudflare2a06:98c1:50::/45
PTRwatson.ns.cloudflare.com
A108.162.195.23🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwatson.ns.cloudflare.com
A162.159.44.23Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwatson.ns.cloudflare.com
A172.64.35.23🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRwatson.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.45.100, 172.67.212.224
IPv62606:4700:3030::ac43:d4e0, 2606:4700:3031::6815:2d64
SOAadel.ns.cloudflare.comdns@cloudflare.com serial=2397063933

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1774687636

Same first word

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sbdf.eu
dbfs.cn
bdfs.com
sfbd.info
fdbs.org
sdfb.de
sdbf.be
fdsb.net
fbsd.se
fbsd.com

DNS History

14 records (6 active, 8 former)

202120222023202420252026NSadel.ns.cloudflare.comwatson.ns.cloudflare.comdavid.ns.cloudflare.comsue.ns.cloudflare.comMX0cf6b1f78af589ad.mx1.emailprofi.seznam.cz0cf6b1f78af589ad.mx2.emailprofi.seznam.czA104.21.45.100172.67.212.2242606:4700:3030::ac43:d4e02606:4700:3031::6815:2d64104.27.184.50104.27.185.502606:4700:3030::681b:b8322606:4700:3037::681b:b932
●NSadel.ns.cloudflare.com2026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
○NSdavid.ns.cloudflare.com2020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
○NSsue.ns.cloudflare.com2020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
●NSwatson.ns.cloudflare.com2026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
○MX0cf6b1f78af589ad.mx1.emailprofi.seznam.cz2020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
○MX0cf6b1f78af589ad.mx2.emailprofi.seznam.cz2020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
●A104.21.45.1002026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
○A104.27.184.502020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
○A104.27.185.502020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
●A172.67.212.2242026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
○A2606:4700:3030::681b:b8322020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08
●A2606:4700:3030::ac43:d4e02026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
●A2606:4700:3031::6815:2d642026-03-27 → 2026-03-28 · 3 obs
○ 2020-03-13 00:38:22
● 2026-03-27 00:34:36
● 2026-03-28 09:05:08
○A2606:4700:3037::681b:b9322020-03-13 → 2020-03-13 · 3 obs
● 2020-03-13 00:38:22
○ 2026-03-27 00:34:36
○ 2026-03-28 09:05:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czd.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz-
sfdb.czadel.ns.cloudflare.com, watson.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.55

NS records: adel.ns.cloudflare.com, watson.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sfdb.cz (unsigned zone)

⏱️ Timing

Total: 702ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.212.224, 104.21.45.100
AAAA22606:4700:3030::ac43:d4e0, 2606:4700:3031::6815:2d64
NS2adel.ns.cloudflare.com, watson.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1adel.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

sfdb.cz points to four IP numbers: 2606:4700:3030::ac43:d4e0, 2606:4700:3031::6815:2d64, 104.21.45.100 and 172.67.212.224.

Other host names, for instance www.7298129id.digital, cmafest.com, cpcontacts.shiitake.bg, cdn-js1.branded3.com and roro44.com share IP numbers with sfdb.cz.

Name Servers

sfdb.cz is delegated to two name servers: adel.ns.cloudflare.com and watson.ns.cloudflare.com.

sfdb.cz uses the same name server setup as other domains, for instance guestwelcomesuite.com, respirea.pl, uisprotect.com, 8273btnrc238o.shop and guestarrivalwelcomehub.com.

sfdb.cz shares name servers with other domains at least partially, for instance neubauten.org, skilriki.is, dgjthwl.com, flashspb.ru and xhdfp.com.

these name servers are often used together with the name servers elaine.ns.cloudflare.com.

Host names with six IP numbers: adel.ns.cloudflare.com points to 2606:4700:50::adf5:3a37, 2803:f800:50::6ca2:c037, 2a06:98c1:50::ac40:2037, 108.162.192.55, 172.64.32.55 and 173.245.58.55; watson.ns.cloudflare.com points to 2606:4700:58::a29f:2c17, 2803:f800:50::6ca2:c317, 2a06:98c1:50::ac40:2317, 108.162.195.23, 162.159.44.23 and 172.64.35.23.