# 4.172.12.153 — IP Intelligence Summary

4.172.12.153 is an IPv4 address operated by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US (AS8075), with approximate network location Toronto, Canada. It belongs to datacenter or hosting infrastructure. As of November 14, 2026, IPDebrief rates it Low Risk (15/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/4.172.12.153
- Last updated: 2026-11-14

## Ownership

- Organization: Microsoft Corporation
- Network name: MSFT
- Allocated block: 4.160.0.0/12
- 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: Toronto
- Region: ON
- Country: Canada
- Time zone: America/Toronto

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

## Network classification

- Infrastructure type: —
- 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 (15/100)
- 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: Not checked
- dmarc: Not checked
- dnssec: Unknown / lookup inconclusive (153.12.172.4.in-addr.arpa)
- fcrDns: Not checked

## TLS observations

- CN=*.trouter.skype.com, O=Microsoft Corporation, L=Redmond, S=WA, C=US; port unknown; target —; Historical certificate; current certificate unknown; valid until 2027-01-19T10:49:25.0000000+00:00

## Nearby addresses

- 4.172.12.147 (https://ipdebrief.com/4.172.12.147)

## Addresses sharing infrastructure

- 4.172.11.173 — Same TLS certificate (https://ipdebrief.com/4.172.11.173)
- 4.174.196.121 — Same TLS certificate (https://ipdebrief.com/4.174.196.121)
- 4.174.196.151 — Same TLS certificate (https://ipdebrief.com/4.174.196.151)
- 4.174.196.224 — Same TLS certificate (https://ipdebrief.com/4.174.196.224)
- 13.91.58.244 — Same TLS certificate (https://ipdebrief.com/13.91.58.244)
- 20.15.152.102 — Same TLS certificate (https://ipdebrief.com/20.15.152.102)
- 20.116.248.103 — Same TLS certificate (https://ipdebrief.com/20.116.248.103)
- 20.116.248.163 — Same TLS certificate (https://ipdebrief.com/20.116.248.163)
- 40.67.185.97 — Same TLS certificate (https://ipdebrief.com/40.67.185.97)
- 48.214.189.177 — Same TLS certificate (https://ipdebrief.com/48.214.189.177)
- 48.216.187.226 — Same TLS certificate (https://ipdebrief.com/48.216.187.226)
- 52.157.5.65 — Same TLS certificate (https://ipdebrief.com/52.157.5.65)

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Source: IPDebrief, "4.172.12.153 IP intelligence", https://ipdebrief.com/4.172.12.153, updated 2026-11-14. Assessments are probabilistic.