mx2.as4u.org - robtex.com

mx2.as4u.org

DNSSEC⚠️ Not signed
A2620:101:2011:300::21🇺🇸 CISCO-22620:101:2011::/48 170 West Tasman Drive San Jose CA 95134 United States
A2620:101:2012:300::20🇺🇸 CISCO-22620:101:2012::/48 170 West Tasman Drive San Jose CA 95134 United States
A23.90.105.186🇺🇸 CISCO-223.90.105.0/24 Cisco Systems Ironport Division Rondebeltweg 62 Almere, State-Flevoland 1329 BG Netherlands
A23.90.110.118🇺🇸 CISCO-223.90.110.0/24 170 West Tasman Drive San Jose CA 95134 United States

as4u.org

DNSSEC⚠️ Not signed
A2a01:28:ca:72::100:195🇨🇿 SuperNetwork2a01:28::/32 s.r.o.
A88.86.100.195🇨🇿 SuperNetwork88.86.96.0/19 s.r.o.
NSns.as4u.org ⭐
NSns.as4u.cz
NSns.district9.cz
MXmx1.as4u.org ⭐
MXmx2.as4u.org(10)
TXTgoogle-site-verification=iY5smOkRtqbtBcjVImivHp9wfkPAoN3FnQDgdF6FvZU
TXTv=spf1 include:_spf.as4u.org ~all
SOAns.as4u.orghostmaster@as4u.org 2026-02-26 #0
📈 Tranco rank: #560,345

MX for

as4u.org

Same first word

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mx2.jp
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mx2.uni5.net
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Similar names

2xm.de
2mx.eu
2xm.com.br
xm2.net
2xm.com.pl
m2x.fr
2mx.it
2mx.cn
2xm.pl
x2m.com
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m2x.org
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xm2.cn
m2x.io
xm2.org
m2x.eu
2mx.cc
m2x.cn
x2m.co.za
2mx.net
2mx.ru
2mx.fr
x2m.de
2mx.org
xm2.us
x2m.biz
2xm.ru
xm2.de
2xm.net
xm2.cl
x2m.com.br
m2x.ru
2mx.co.uk
2mx.at
m2x.app
m2x.co
2mx.info
2xm.pt
m2x.net
xm2.com
2mx.nl
m2x.de
x2m.cn
2mx.ro
2mx.com.br
2xm.com
m2x.it
x2m.ru
2xm.cn
m2x.nl
m2x.alwaysdata.net
2mx.de
2mx.xyz
xm2.ru
2mx.com
xm2.it
x2m.org
m2x.ca
2mx.dev
2xm.dk
m2x.com
2xm.eu

DNS History

4 records (4 active, 0 former)

A23.90.105.18623.90.110.1182620:101:2011:300::212620:101:2012:300::20
●A23.90.105.1862026-02-15 → 2026-04-27 · 2 obs
● 2026-02-15 04:58:02
● 2026-04-27 10:12:18
●A23.90.110.1182026-02-15 → 2026-04-27 · 2 obs
● 2026-02-15 04:58:02
● 2026-04-27 10:12:18
●A2620:101:2011:300::212026-02-15 → 2026-04-27 · 2 obs
● 2026-02-15 04:58:02
● 2026-04-27 10:12:18
●A2620:101:2012:300::202026-02-15 → 2026-04-27 · 2 obs
● 2026-02-15 04:58:02
● 2026-04-27 10:12:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
as4u.orgns.district9.cz, ns.as4u.org, ns.as4u.cz1 record

✅ Authoritative Response

Server:37.205.8.46

NS records: ns.district9.cz, ns.as4u.org, ns.as4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for as4u.org (unsigned zone)

⏱️ Timing

Total: 600ms | Queries: -

📄 Records

TypeCountSample Data
A223.90.110.118, 23.90.105.186
AAAA22620:101:2011:300::21, 2620:101:2012:300::20

📌 Glue Records Collected

Total: 1

In-bailiwick: 1 (ns.as4u.org)

Analysis

Mail Server Role

mx2.as4u.org handles mail for as4u.org.

mx1.as4u.org is a mail server commonly used with mx2.as4u.org.

IP Addresses

mx2.as4u.org maps to four IP numbers: 2620:101:2011:300::21, 2620:101:2012:300::20, 23.90.105.186 and 23.90.110.118.

Other host names such as esa1.hc1982-32.eu.iphmx.com, mx1.as4u.org, esa2.hc1982-32.eu.iphmx.com, mx2.hc1982-32.eu.iphmx.com and mx2.mzp.cz share IPs with mx2.as4u.org.