cuc.nu - robtex.com

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

cuc.nu

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:9b3aCloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:5251Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.82.81Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.155.58Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSadam.ns.cloudflare.com ⭐
NSmona.ns.cloudflare.com
MX37f30305173e7b93.mx2.emailprofi.seznam.cz ⭐
MX37f30305173e7b93.mx1.emailprofi.seznam.cz(20)
TXTv=spf1 include:spf.seznam.cz ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.82.81, 172.67.155.58
IPv6 hints2606:4700:3032::ac43:9b3a, 2606:4700:3037::6815:5251
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=1, name=cloudflare-ech.com
SOAadam.ns.cloudflare.comdns@cloudflare.com serial=2417645499

nu

DNSSEC⚠️ Not signed
NScatcher-in-the-rye.nic.nu ⭐
NSa.ns.nu
NSb.ns.nu
NSc.ns.nu
NSd.ns.nu
NSf.ns.nu
NSg.ns.nu
NSi.ns.nu
NSm.ns.nu
NSy.ns.nu
NSz.ns.nu
TXTid:1613489f-84e1-42b2-b83d-802b73274d49
TXTNU zone update: 2026-10-19 13:26:46 +0000 (EPOCH 1792416406) (auto)
SOAcatcher-in-the-rye.nic.nuhostmaster@nic.nu serial=1792416457

Same first word

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DNS History

8 records (8 active, 0 former)

NSadam.ns.cloudflare.commona.ns.cloudflare.comMX37f30305173e7b93.mx1.emailprofi.seznam.cz37f30305173e7b93.mx2.emailprofi.seznam.czA104.21.82.81172.67.155.582606:4700:3032::ac43:9b3a2606:4700:3037::6815:5251
●NSadam.ns.cloudflare.com2026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●NSmona.ns.cloudflare.com2026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●MX37f30305173e7b93.mx1.emailprofi.seznam.cz2026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●MX37f30305173e7b93.mx2.emailprofi.seznam.cz2026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●A104.21.82.812026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●A172.67.155.582026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●A2606:4700:3032::ac43:9b3a2026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52
●A2606:4700:3037::6815:52512026-08-26 → 2026-10-19 · 2 obs
● 2026-08-26 18:43:30
● 2026-10-19 13:49:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nua.ns.nu, b.ns.nu, c.ns.nu, d.ns.nu...-
cuc.nuadam.ns.cloudflare.com, mona.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.206

NS records: adam.ns.cloudflare.com, mona.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

Root DNSKEY fetch failed: Error: connect EADDRNOTAVAIL 198.41.0.4:53 - Local (0.0.0.0:0)

⏱️ Timing

Total: 1611ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.82.81, 172.67.155.58
AAAA22606:4700:3037::6815:5251, 2606:4700:3032::ac43:9b3a
NS2adam.ns.cloudflare.com, mona.ns.cloudflare.com
MX237f30305173e7b93.mx2.emailprofi.seznam.c, 37f30305173e7b93.mx1.emailprofi.seznam.c
TXT1v=spf1 include:spf.seznam.cz ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1adam.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

cuc.nu points to four IP numbers: 104.21.82.81, 172.67.155.58, 2606:4700:3032::ac43:9b3a and 2606:4700:3037::6815:5251.

Name Servers

cuc.nu has two authoritative name servers — adam.ns.cloudflare.com and mona.ns.cloudflare.com.

Mail Servers

cuc.nu has two mail servers: 37f30305173e7b93.mx1.emailprofi.seznam.cz and 37f30305173e7b93.mx2.emailprofi.seznam.cz.