understack.dk - dns.ninja
understack.dk
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::6815:1746🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::ac43:d17d🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.23.70Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.209.125🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | tanner.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::a29f:2c61🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c361🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2361🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| A | 108.162.195.97🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| A | 162.159.44.97Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| A | 172.64.35.97🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tanner.ns.cloudflare.com | ||||||
| NS | tess.ns.cloudflare.com | ||||||
| A | 2606:4700:50::adf5:3ae3🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c0e3🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:20e3🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| A | 108.162.192.227🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| A | 172.64.32.227🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| A | 173.245.58.227🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tess.ns.cloudflare.com | ||||||
| MX | mx.simply.com ⭐ | ||||||
| A | 94.231.106.20🇩🇰 team-blue-denmark94.231.96.0/20 ZITCOM A/S | ||||||
| PTR | mx.simply.com | ||||||
| TXT | google-site-verification=Lpcz4BYpMQB6t83ytLXONT9x4H1Rgk95CgoyjlI-T_k | ||||||
| TXT | resend-domain-verification=423b46cc3c672d8a881b745e0a7d03c4 | ||||||
| TXT | v=spf1 include:spf.simply.com -all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.23.70, 172.67.209.125 | ||||||
| IPv6 hints | 2606:4700:3032::6815:1746, 2606:4700:3036::ac43:d17d | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=63, name=cloudflare-ech.com | ||||||
| SOA | tanner.ns.cloudflare.comdns@cloudflare.com serial=2416063535 | ||||||
dk
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | b.nic.dk ⭐ | ||||||
| NS | c.nic.dk | ||||||
| NS | h.nic.dk | ||||||
| NS | l.nic.dk | ||||||
| NS | s.nic.dk | ||||||
| NS | t.nic.dk | ||||||
| TXT | DK zone updateEpoch 1790604900localtime Mon Sep 28 16:15:00 2026gmtime Mon Se... | ||||||
| SOA | b.nic.dktech@punktum.dk serial=1790604900 | ||||||
Same first word
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track(0x6e756465)s.net |
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Previous names
Next names
DNS History
11 records (7 active, 4 former)
○NSns1.simply.com2026-09-20 → 2026-09-20 · 3 obs
○ 2026-09-28 14:28:58
○ 2026-09-28 14:29:00
○NSns2.simply.com2026-09-20 → 2026-09-20 · 3 obs
○ 2026-09-28 14:28:58
○ 2026-09-28 14:29:00
○NSns3.simply.com2026-09-20 → 2026-09-20 · 3 obs
○ 2026-09-28 14:28:58
○ 2026-09-28 14:29:00
●NStanner.ns.cloudflare.com2026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
●NStess.ns.cloudflare.com2026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
●MXmx.simply.com2026-09-20 → 2026-09-28 · 2 obs
● 2026-09-28 14:29:00
●A104.21.23.702026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
●A172.67.209.1252026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
○A216.198.79.12026-09-20 → 2026-09-20 · 3 obs
○ 2026-09-28 14:28:58
○ 2026-09-28 14:29:00
●A2606:4700:3032::6815:17462026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
●A2606:4700:3036::ac43:d17d2026-09-28 → 2026-09-28 · 3 obs
● 2026-09-28 14:28:58
● 2026-09-28 14:29:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| dk | b.nic.dk, c.nic.dk, h.nic.dk, l.nic.dk... | 12 records |
| understack.dk | tanner.ns.cloudflare.com, tess.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.58.227
NS records: tanner.ns.cloudflare.com, tess.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for understack.dk (unsigned zone)
⏱️ Timing
Total: 785ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.209.125, 104.21.23.70 |
| AAAA | 2 | 2606:4700:3036::ac43:d17d, 2606:4700:3032::6815:1746 |
| NS | 2 | tanner.ns.cloudflare.com, tess.ns.cloudflare.com |
| MX | 1 | mx.simply.com (pri: 10) |
| TXT | 3 | google-site-verification=Lpcz4BYpMQB6t83, resend-domain-verification=423b46cc3c672... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | tanner.ns.cloudflare.com dns.cloudflare. |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (b.nic.dk, b.nic.dk, c.nic.dk...)
Analysis
IP Addresses
understack.dk resolves to four IP addresses: 104.21.23.70, 172.67.209.125, 2606:4700:3032::6815:1746 and 2606:4700:3036::ac43:d17d.
energsweep.world, adamatbaacilik.com.tr, sieutool.net plus two other host names have IP numbers in common with understack.dk.
Name Servers
DNS delegation for understack.dk points to two name servers: tanner.ns.cloudflare.com and tess.ns.cloudflare.com.
The name server configuration of understack.dk is shared with other domains, for instance ys044.pages.dev, yl263.pages.dev, da-kas-com.pages.dev and two others.
understack.dk partially shares its NS delegation with several other domains, including pisangtogel-asli.pages.dev, plugadx.com, up425.top and two others.
These name servers are regularly seen alongside maisie.ns.cloudflare.com and jerome.ns.cloudflare.com as name servers.
Hosts with 6 IP addresses each:
tanner.ns.cloudflare.com has IP addresses 108.162.195.97, 162.159.44.97 and 172.64.35.97, plus 3 other.
tess.ns.cloudflare.com has IP addresses 108.162.192.227, 172.64.32.227 and 173.245.58.227, plus 3 other.
Mail Servers
understack.dk uses one mail server — mx.simply.com.
The mail server setup of understack.dk matches that of other domains such as stikkelorum.nl, heavenlyhomes.dk, ostman.dk and two others.
mx.simply.com has exactly one IP number: 94.231.106.20.