mail.worldblocks.io - robtex.com

mail.worldblocks.io

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:4645🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:dd15🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.70.69Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.221.21🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.70.69, 172.67.221.21
IPv6 hints2606:4700:3032::6815:4645, 2606:4700:3037::ac43:dd15
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=177, name=cloudflare-ech.com

worldblocks.io

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:4645🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:dd15🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.70.69Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.221.21🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSmargo.ns.cloudflare.com ⭐
NSmonika.ns.cloudflare.com
MXmail.worldblocks.io ⭐
TXTv=spf1 a mx ip187.77.79.143 ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.70.69, 172.67.221.21
IPv6 hints2606:4700:3032::6815:4645, 2606:4700:3037::ac43:dd15
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=177, name=cloudflare-ech.com
SOAmargo.ns.cloudflare.comdns@cloudflare.com serial=2409786417
⚠️ On DNS blocklist: tif

MX for

worldblocks.io

Same first word

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DNS History

4 records (4 active, 0 former)

A104.21.70.69172.67.221.212606:4700:3032::6815:46452606:4700:3037::ac43:dd15
●A104.21.70.692026-07-16 → 2026-07-18 · 2 obs
● 2026-07-16 06:21:40
● 2026-07-18 13:45:22
●A172.67.221.212026-07-16 → 2026-07-18 · 2 obs
● 2026-07-16 06:21:40
● 2026-07-18 13:45:22
●A2606:4700:3032::6815:46452026-07-16 → 2026-07-18 · 2 obs
● 2026-07-16 06:21:40
● 2026-07-18 13:45:22
●A2606:4700:3037::ac43:dd152026-07-16 → 2026-07-18 · 2 obs
● 2026-07-16 06:21:40
● 2026-07-18 13:45:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
iob0.nic.io, a2.nic.io, a0.nic.io, c0.nic.io-
worldblocks.iomonika.ns.cloudflare.com, margo.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.38.56

NS records: monika.ns.cloudflare.com, margo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for worldblocks.io (unsigned zone)

⏱️ Timing

Total: 279ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.221.21, 104.21.70.69
AAAA22606:4700:3032::6815:4645, 2606:4700:3037::ac43:dd15
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

Mail Server Role

worldblocks.io uses mail.worldblocks.io as a mail server.

IP Addresses

mail.worldblocks.io has four IP addresses: 104.21.70.69, 172.67.221.21, 2606:4700:3032::6815:4645 and 2606:4700:3037::ac43:dd15.

blackhawx.com, defibids.com, gomosek12.top and two other host names share IP numbers with mail.worldblocks.io.