gcmo.mail.onmicrosoft.com - robtex.com

gcmo.mail.onmicrosoft.com

DNSSEC⚠️ Not signed
MXgcmo-mail-onmicrosoft-com.mail.protection.outlook.com ⭐
A2a01:111:f403:f900::1🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-blapr09cu00101.inbound.protection.outlook.com
A2a01:111:f403:f904::🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-dm6pr09cu00200.inbound.protection.outlook.com
A2a01:111:f403:f904::1🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-ds0pr09cu00101.inbound.protection.outlook.com
A2a01:111:f403:f90e::1🇺🇸 Microsoft2a01:111:f000::/36
PTRmail-sa9pr09cu00101.inbound.protection.outlook.com
A52.101.8.50🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-dm6pr09cu00202.inbound.protection.outlook.com
A52.101.8.52🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-ds0pr09cu00104.inbound.protection.outlook.com
A52.101.9.19🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-blapr09cu00103.inbound.protection.outlook.com
A52.101.11.12🇺🇸 Microsoft52.96.0.0/12 MICROSOFT
PTRmail-sa9pr09cu00104.inbound.protection.outlook.com
TXTv=spf1 include:outlook.com -all

mail.onmicrosoft.com

DNSSEC⚠️ Not signed
MXmail.mail.protection.outlook.com ⭐
TXTv=spf1 include:spf.protection.outlook.com -all
WOT: SAFE (50/100)

Subdomains

autodiscover.gcmo.mail.onmicrosoft.com

Same first word

gcmo.com
gcmo.cn

Similar names

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mgco.ru
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gocm.net
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mgco.com
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mcgo.pl
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gcom.co
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gmco.com
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cogm.cc
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comg.ru
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cmgo.de
gcom.mx
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mcog.org
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mgco.io
gcom.fr
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gmco.com.cn
gmco.org
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gcom.nl
cogm.us
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gcom.com
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cmgo.info
mogc.co.jp
gmco.de
gcom.it
mgco.be
ogcm.mx
gocm.de
gmco.ie
mgoc.ca
gomc.info

DNS History

5 records (1 active, 4 former)

201820192020202120222023202420252026NSns1.bdm.microsoftonline.comns2.bdm.microsoftonline.comns3.bdm.microsoftonline.comns4.bdm.microsoftonline.comMXgcmo-mail-onmicrosoft-com.mail.protection.outlook.com
○NSns1.bdm.microsoftonline.com2017-04-11 → 2017-04-11 · 3 obs
● 2017-04-11 06:15:44
○ 2026-03-28 06:51:16
○ 2026-05-13 14:03:16
○NSns2.bdm.microsoftonline.com2017-04-11 → 2017-04-11 · 3 obs
● 2017-04-11 06:15:44
○ 2026-03-28 06:51:16
○ 2026-05-13 14:03:16
○NSns3.bdm.microsoftonline.com2017-04-11 → 2017-04-11 · 3 obs
● 2017-04-11 06:15:44
○ 2026-03-28 06:51:16
○ 2026-05-13 14:03:16
○NSns4.bdm.microsoftonline.com2017-04-11 → 2017-04-11 · 3 obs
● 2017-04-11 06:15:44
○ 2026-03-28 06:51:16
○ 2026-05-13 14:03:16
●MXgcmo-mail-onmicrosoft-com.mail.protection.outlook.com2017-04-11 → 2026-05-13 · 2 obs
● 2017-04-11 06:15:44
● 2026-05-13 14:03:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, l.gtld-servers.net, j.gtld-servers.net, b.gtld-servers.net...-
onmicrosoft.comns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com8 records

✅ Authoritative Response

Server:150.171.21.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for onmicrosoft.com (unsigned zone)

⏱️ Timing

Total: 797ms | Queries: -

📄 Records

TypeCountSample Data
MX1gcmo-mail-onmicrosoft-com.mail.protectio
TXT1v=spf1 include:outlook.com -all

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns1.bdm.microsoftonline.com, ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...)

Analysis

Hierarchy

autodiscover.gcmo.mail.onmicrosoft.com is a child of gcmo.mail.onmicrosoft.com.

Mail Servers

A single mail server handles gcmo.mail.onmicrosoft.com, gcmo-mail-onmicrosoft-com.mail.protection.outlook.com.

Host gcmo-mail-onmicrosoft-com.mail.protection.outlook.com points to eight IPs: 2a01:111:f403:f900::1, 2a01:111:f403:f904::, 2a01:111:f403:f904::1, 2a01:111:f403:f90e::1, 52.101.8.50, 52.101.8.52, 52.101.9.19 and 52.101.11.12.