smtp.ko-sys.com - robtex.com

smtp.ko-sys.com

DNSSEC⚠️ Not signed
A2a01:488:66:1000:57e6:1735:0:1🇩🇪 GODADDY2a01:488::/32 DE-HER-V6-INITIAL
PTRxanos.ko-sys.com
A87.230.23.53🇫🇷 GD-EMEA-DC-SXB187.230.0.0/19

ko-sys.com

DNSSEC⚠️ Not signed
A2001:4860:4802:32::15🇺🇸 Google2001:4860::/32
A2001:4860:4802:34::15🇺🇸 Google2001:4860::/32
A2001:4860:4802:36::15🇺🇸 Google2001:4860::/32
A2001:4860:4802:38::15🇺🇸 Google2001:4860::/32
A216.239.32.21🇺🇸 Google216.239.32.0/24
A216.239.34.21🇺🇸 Google216.239.34.0/24
A216.239.36.21🇺🇸 Google216.239.36.0/24
A216.239.38.21🇺🇸 Google216.239.38.0/24
NSns-cloud-d1.googledomains.com ⭐
NSns-cloud-d2.googledomains.com
NSns-cloud-d3.googledomains.com
NSns-cloud-d4.googledomains.com
MXsmtp.ko-sys.com ⭐
TXTv=spf1 ip4:87.230.23.53 ip6:2a01:488:66:1000:57e6:1735:0:1/128 -all
TXThave-i-been-pwned-verification=591634037d3f67100c70f82a46cb3b7c
TXTgoogle-site-verification=Aex707OtdE-Y_UnJbb6JRN-7htdHTObNSvH5XD0lyF0
SOAns-cloud-d1.googledomains.comcloud-dns-hostmaster@google.com serial=1

MX for

ko-sys.com
simfed.org

Same first word

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DNS History

4 records (2 active, 2 former)

20162017201820192020202120222023202420252026A2a01:488:66:1000:57e6:1735:0:187.230.23.532a01:488:66:1000:53a9:2cdb:0:183.169.44.219
○A2a01:488:66:1000:53a9:2cdb:0:12015-08-19 → 2016-01-14 · 4 obs
● 2015-08-19 02:39:26
● 2016-01-14 08:07:04
○ 2016-01-21 08:48:24
○ 2026-03-29 15:59:00
●A2a01:488:66:1000:57e6:1735:0:12016-01-21 → 2026-03-29 · 3 obs
○ 2016-01-14 08:07:04
● 2016-01-21 08:48:24
● 2026-03-29 15:59:00
○A83.169.44.2192015-08-19 → 2016-01-14 · 4 obs
● 2015-08-19 02:39:26
● 2016-01-14 08:07:04
○ 2016-01-21 08:48:24
○ 2026-03-29 15:59:00
●A87.230.23.532016-01-21 → 2026-03-29 · 3 obs
○ 2016-01-14 08:07:04
● 2016-01-21 08:48:24
● 2026-03-29 15:59:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net, a.gtld-servers.net...-
ko-sys.comns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d4.googledomains.com8 records

✅ Authoritative Response

Server:216.239.36.109

NS records: ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d4.googledomains.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 759ms | Queries: -

📄 Records

TypeCountSample Data
A187.230.23.53
AAAA12a01:488:66:1000:57e6:1735:0:1

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns-cloud-d1.googledomains.com, ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com...)

Analysis

Mail Server Role

smtp.ko-sys.com serves as the mail server for ko-sys.com and simfed.org.

IP Addresses

smtp.ko-sys.com resolves to two IP numbers: 2a01:488:66:1000:57e6:1735:0:1 and 87.230.23.53.

Other host names share IP numbers with smtp.ko-sys.com; for instance xanos.ko-sys.com.