mail.osti.com.ph - robtex.com

mail.osti.com.ph

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:4d30🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:cca4🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.77.48Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.204.164🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.77.48, 172.67.204.164
IPv6 hints2606:4700:3032::6815:4d30, 2606:4700:3034::ac43:cca4
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=147, name=cloudflare-ech.com

osti.com.ph

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:4d30🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:cca4🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.77.48Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.204.164🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSwatson.ns.cloudflare.com ⭐
NSzelda.ns.cloudflare.com
MX_dc-mx.0418eb3d499d.osti.com.ph ⭐
TXTv=spf1 +a +mx +ip4:185.184.155.9 +ip4:27.123.31.81 include:spf.securemail.ema...
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.77.48, 172.67.204.164
IPv6 hints2606:4700:3032::6815:4d30, 2606:4700:3034::ac43:cca4
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=147, name=cloudflare-ech.com
SOAwatson.ns.cloudflare.comdns@cloudflare.com serial=2409402431

Previously MX for

osti.com.ph

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DNS History

5 records (4 active, 1 former)

A104.21.77.48172.67.204.1642606:4700:3032::6815:4d302606:4700:3034::ac43:cca427.123.31.81
●A104.21.77.482026-06-15 → 2026-08-07 · 3 obs
○ 2026-05-23 10:09:04
● 2026-06-15 06:58:06
● 2026-08-07 16:37:24
●A172.67.204.1642026-06-15 → 2026-08-07 · 3 obs
○ 2026-05-23 10:09:04
● 2026-06-15 06:58:06
● 2026-08-07 16:37:24
●A2606:4700:3032::6815:4d302026-06-15 → 2026-08-07 · 3 obs
○ 2026-05-23 10:09:04
● 2026-06-15 06:58:06
● 2026-08-07 16:37:24
●A2606:4700:3034::ac43:cca42026-06-15 → 2026-08-07 · 3 obs
○ 2026-05-23 10:09:04
● 2026-06-15 06:58:06
● 2026-08-07 16:37:24
○A27.123.31.812026-02-22 → 2026-05-23 · 7 obs
● 2026-02-22 11:31:54
● 2026-03-08 19:22:10
○ 2026-03-09 14:41:22
● 2026-04-08 11:19:04
● 2026-05-23 10:09:04
○ 2026-06-15 06:58:06
○ 2026-08-07 16:37:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ph1.ns.ph, ph.communitydns.net, ns2.cuhk.edu.hk, ns4.apnic.net8 records
osti.com.phzelda.ns.cloudflare.com, watson.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.242

NS records: zelda.ns.cloudflare.com, watson.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for osti.com.ph (unsigned zone)

⏱️ Timing

Total: 292ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.204.164, 104.21.77.48
AAAA22606:4700:3032::6815:4d30, 2606:4700:3034::ac43:cca4
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 8

In-bailiwick: 2 (1.ns.ph, 1.ns.ph)

Out-of-bailiwick: 6 (ns4.apnic.net, ns2.cuhk.edu.hk, ph.communitydns.net...)

Analysis

IP Addresses

mail.osti.com.ph resolves to four IP addresses: 104.21.77.48, 172.67.204.164, 2606:4700:3032::6815:4d30 and 2606:4700:3034::ac43:cca4.

writeatender.com, code10.pl, paradiamjewelry.com plus two other host names have IP numbers in common with mail.osti.com.ph.