us.sdtek.com - robtex.com

us.sdtek.com

DNSSEC⚠️ Not signed
A2606:4700:3034::ac43:87e4🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:751🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.7.81Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.135.228🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.7.81, 172.67.135.228
IPv62606:4700:3034::ac43:87e4, 2606:4700:3037::6815:751

sdtek.com

DNSSEC⚠️ Not signed
A2606:4700:3034::ac43:87e4🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:751🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.7.81Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.135.228🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSalbert.ns.cloudflare.com ⭐
NSelisa.ns.cloudflare.com
MXaspmx.l.google.com ⭐
MXalt1.aspmx.l.google.com(5)
MXalt2.aspmx.l.google.com(5)
MXaspmx2.googlemail.com(10)
MXaspmx3.googlemail.com(10)
TXTv=spf1 include:_spf.google.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.7.81, 172.67.135.228
IPv62606:4700:3034::ac43:87e4, 2606:4700:3037::6815:751
SOAalbert.ns.cloudflare.comdns@cloudflare.com serial=2399588742
📈 Tranco rank: #81,155

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DNS History

8 records (4 active, 4 former)

A104.21.7.81172.67.135.2282606:4700:3034::ac43:87e42606:4700:3037::6815:751188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●A104.21.7.812026-03-25 → 2026-03-25 · 2 obs
○ 2026-03-05 14:23:42
● 2026-03-25 05:43:06
●A172.67.135.2282026-03-25 → 2026-03-25 · 2 obs
○ 2026-03-05 14:23:42
● 2026-03-25 05:43:06
○A188.114.96.02026-03-05 → 2026-03-05 · 2 obs
● 2026-03-05 14:23:42
○ 2026-03-25 05:43:06
○A188.114.97.02026-03-05 → 2026-03-05 · 2 obs
● 2026-03-05 14:23:42
○ 2026-03-25 05:43:06
●A2606:4700:3034::ac43:87e42026-03-25 → 2026-03-25 · 2 obs
○ 2026-03-05 14:23:42
● 2026-03-25 05:43:06
●A2606:4700:3037::6815:7512026-03-25 → 2026-03-25 · 2 obs
○ 2026-03-05 14:23:42
● 2026-03-25 05:43:06
○A2a06:98c1:3120::2026-03-05 → 2026-03-05 · 2 obs
● 2026-03-05 14:23:42
○ 2026-03-25 05:43:06
○A2a06:98c1:3121::2026-03-05 → 2026-03-05 · 2 obs
● 2026-03-05 14:23:42
○ 2026-03-25 05:43:06

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
sdtek.comalbert.ns.cloudflare.com, elisa.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.58

NS records: albert.ns.cloudflare.com, elisa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sdtek.com (unsigned zone)

⏱️ Timing

Total: 115ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.7.81, 172.67.135.228
AAAA22606:4700:3037::6815:751, 2606:4700:3034::ac43:87e4
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (albert.ns.cloudflare.com, albert.ns.cloudflare.com, albert.ns.cloudflare.com...)

Analysis

IP Addresses

us.sdtek.com refers to four IP numbers: 2606:4700:3034::ac43:87e4, 2606:4700:3037::6815:751, 104.21.7.81 and 172.67.135.228.

Other host names, for instance 0777dy.com, worker-square-field-86bd.pacelo7207.workers.dev, centcal.com, mairea-libros.com and thach.io share IP numbers with us.sdtek.com.