`mail.blockalive.com`

DNSSEC	⚠️ Not signed
A	5.9.136.242^{🇩🇪 Hetzner5.9.0.0/16 HETZNER-RZ-FKS-BLK5}
		PTR	`server.martinrosulek.cz`

`blockalive.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:4173^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::ac43:be15^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.115^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.190.21^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`ali.ns.cloudflare.com` ⭐
NS	`seth.ns.cloudflare.com`
MX	`mail.blockalive.com` ⭐
TXT	`v=spf1 a mx include:sparkpostmail.com include:_spf.google.com +a:server.marti...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.65.115, 172.67.190.21
		IPv6	2606:4700:3032::6815:4173, 2606:4700:3035::ac43:be15
SOA	`ali.ns.cloudflare.com`dns@cloudflare.com serial=2397917880

MX for

blockalive.com

Same first word

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DNS History

2 records (1 active, 1 former)

○A162.241.230.662017-11-10 → 2017-11-10 · 3 obs

● 2017-11-10 05:12:24
○ 2026-02-26 06:07:58
○ 2026-03-23 21:07:26

●A5.9.136.2422026-02-26 → 2026-03-23 · 3 obs

○ 2017-11-10 05:12:24
● 2026-02-26 06:07:58
● 2026-03-23 21:07:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	e.gtld-servers.net, l.gtld-servers.net, g.gtld-servers.net, j.gtld-servers.net...	-
blockalive.com	seth.ns.cloudflare.com, ali.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.59

NS records: seth.ns.cloudflare.com, ali.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for blockalive.com (unsigned zone)

⏱️ Timing

Total: 451ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`5.9.136.242`

📌 Glue Records Collected

Total: 12

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

Analysis

Mail Server Role

mail.blockalive.com is the mail server for blockalive.com.

IP Addresses

mail.blockalive.com points to a single IP number: 5.9.136.242.

other host names for instance server.martinrosulek.cz, mail.muj-pravnik.cz, mail.chytryprevod.cz, mail.jakdoaustralie.cz and mail.mladyinvestor.cz share IP numbers with mail.blockalive.com.

mail.blockalive.com - robtex.com