`mail.tulup.cz`

DNSSEC	⚠️ Not signed
A	51.77.34.96^{🇵🇱 OVH51.77.0.0/16}
		PTR	`mxtu01.defto.com`

`tulup.cz`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::ac43:9292^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:57d4^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.87.212^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.146^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`luke.ns.cloudflare.com` ⭐
NS	`macy.ns.cloudflare.com`
MX	`mail.tulup.cz` ⭐
TXT	`1\|www.tulup.cz`
TXT	`google-site-verification=3UfvrIlMk93gSNsfNHgJoiRWbo6VKQuyfHamQwik9Pc`
TXT	`v=spf1 ip4:51.77.34.96 include:mx.ovh.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.87.212, 172.67.146.146
		IPv6 hints	2606:4700:3035::ac43:9292, 2606:4700:3036::6815:57d4
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=108, name=cloudflare-ech.com
SOA	`luke.ns.cloudflare.com`dns@cloudflare.com serial=2404035062

MX for

www.tulup.cz

tulup.cz

Same first word

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DNS History

1 record (1 active, 0 former)

●A51.77.34.962026-03-15 → 2026-05-12 · 2 obs

● 2026-03-15 20:58:10
● 2026-05-12 02:27:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
tulup.cz	luke.ns.cloudflare.com, macy.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.200

NS records: luke.ns.cloudflare.com, macy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tulup.cz (unsigned zone)

⏱️ Timing

Total: 980ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`51.77.34.96`

Analysis

Mail Server Role

mail.tulup.cz handles mail for www.tulup.cz and tulup.cz.

IP Addresses

mail.tulup.cz maps to IP address 51.77.34.96.

Other host names, for example mail.tulup.es, mail.tulup.pl and mxtu01.defto.com share the same IP as mail.tulup.cz.

mail.tulup.cz - robtex.com

mail.tulup.cz

tulup.cz