# 40.100.4.165 — IP Intelligence Summary

40.100.4.165 is an IPv4 address operated by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US (AS8075), with approximate network location Vienna, Austria. It belongs to datacenter or hosting infrastructure. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/40.100.4.165
- Last updated: 2026-11-13

## Ownership

- Organization: Microsoft Corporation
- Network name: MSFT
- Allocated block: 40.74.0.0/15
- ASN: AS8075 (https://ipdebrief.com/asn/8075)
- Regional registry: ARIN
- Registered holder: Microsoft Corporation
- Routing operator: MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US
- Network registration country: United States
- Registrant address country: —
- Cloud / hosting provider: Microsoft Azure

## Location

- City: Vienna
- Region: State of Vienna
- Country: Austria
- Time zone: Europe/Vienna

Approximate network location; registration and certificate addresses are not server-location evidence.

## Network classification

- Infrastructure type: CloudCompute
- Datacenter / hosting: yes
- Residential: no
- Mobile: no
- Anycast: Unverified (not proof of unicast)
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Exposed services

- 80/tcp — http
- 443/tcp — https

## DNS posture

Mail authentication and CAA are optional domain policies, not IP-wide requirements.

- caa: Not applicable (—)
- spf: Unknown / lookup inconclusive (attachment.outlook.live.net, attachment.outlook.office.net, hotmail.com, internal.outlook.com, live.com, office.com, office365.com, outlook.com, outlook.office365.com)
- dmarc: Unknown / lookup inconclusive (_dmarc.attachment.outlook.live.net, _dmarc.attachment.outlook.office.net, _dmarc.hotmail.com, _dmarc.internal.outlook.com, _dmarc.live.com, _dmarc.office.com, _dmarc.office365.com, _dmarc.outlook.com, _dmarc.outlook.office365.com)
- dnssec: Unknown / lookup inconclusive (165.4.100.40.in-addr.arpa)
- fcrDns: Unknown / lookup inconclusive

## TLS observations

- CN=outlook.com, O=Microsoft Corporation, L=Redmond, S=Washington, C=US; port unknown; target —; Historical certificate; current certificate unknown; valid until 2027-04-29T23:59:59.0000000+00:00

## Nearby addresses

- 40.100.4.169 (https://ipdebrief.com/40.100.4.169)
- 40.100.4.192 (https://ipdebrief.com/40.100.4.192)

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Source: IPDebrief, "40.100.4.165 IP intelligence", https://ipdebrief.com/40.100.4.165, updated 2026-11-13. Assessments are probabilistic.