4.172.12.153
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.
🏢 Ownership & Registration
| Registered holder | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | MSFT |
| CIDR Block | 4.160.0.0/12 |
| RIR | ARIN |
| Network registration country | United States |
| Routing operator | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR Record | No PTR |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
DNS Posture
Results describe the queried names. SPF, DMARC and CAA are domain policies, not requirements for every IP. DNSSEC here describes reverse DNS; inconclusive validation does not mean unsigned.
Not assessed: 0 conclusive IP DNS checks.
| caa | Not applicable |
| spf | Not checked |
| dmarc | Not checked |
| dnssec | Unknown / lookup inconclusive 153.12.172.4.in-addr.arpa |
| fcrDns | Not checked |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| Port | Probe target | Certificate finding |
|---|---|---|
| (IP-targeted) | CN=*.trouter.skype.com, O=Microsoft Corporation, L=Redmond, S=WA, C=US Historical certificate; current certificate unknown |
| SANs | *.trouter.skype.comgo.trouter.io |
| Valid From | 2026-10-11T11:49:25+00:00 |
| Valid Until | 2027-01-19T10:49:25+00:00 |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha384RSA |
| Validity Period | 99 days |
🛡️ Public Network Snapshot
| Origin ASN | AS8075 |
| Network Prefix | 4.160.0.0/12 |
| Route mapping | Found |
| HSTS | Enabled |
| CSP | Not detected |
| HTTP/2 | Enabled |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 27% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 35% | 2 | 4 |
| ownership | 27% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 19% | 2 | 2 |
| Overall | 22% | 10 | 15 |
| Data Coherence | Consistent (100%) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Recent
| First Seen | 2026-10-23 04:02:47 UTC |
| Last Seen | 2026-11-11 06:05:58 UTC |
| Profile Built | 2026-11-14 04:39:26 UTC |
| Data Freshness | Recent |
| Signal Types | 21 |
| Total Observations | 30 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 4.172.12.153
Who owns the IP address 4.172.12.153?
4.172.12.153 is registered to Microsoft Corporation. The address falls within the 4.160.0.0/12 network block. Registration is held at ARIN.
Where is 4.172.12.153 located?
Geolocation data places 4.172.12.153 in Toronto, ON, Canada. The local time zone is America/Toronto. IP geolocation is approximate, not a precise physical address. Registration country and certificate organization addresses do not establish service location.
Is 4.172.12.153 malicious or safe?
4.172.12.153 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What ports are open on 4.172.12.153?
Responsive ports observed on 4.172.12.153 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 4.172.12.153 a VPN, proxy, or data center address?
4.172.12.153 is classified as cloud infrastructure based on network ownership and behavioural analysis.