Sh4mefulIP Address: 52.101.178.109 ⚠ IP Confounder
Covers 52.100-103.x.x outbound; PTR: *.outbound.protection.outlook.com
Differentiating between Office 365, including email protection services, and Azure (public cloud) when diagnosing incidents is challenging because they utilize shared Microsoft-owned IP ranges. Most of this is probably O365/Outlook or Defender protection breaking DKIM and SPF authentication. Disambiguation is a work-in-progress.
This page shows DMARC authentication failure data for this IP address. Learn more about this data.
Geolocation Information
- Country:
- NO Norway
- Region:
- Oslo County
- City:
- Oslo
- Coordinates:
- 59.9133, 10.7389
WHOIS Information
- Network Name:
- MSFT
- CIDR:
52.96.0.0/12, 52.112.0.0/14- Owner:
- Microsoft Corporation
- Org ID:
MSFT- Address:
- One Microsoft Way, Redmond, WA 98052
- Reverse DNS:
-
mail-norwayeastazon11020109.outbound.protection.outlook.com
Last updated: 2/5/2026
Analysis
This IP was first observed on October 23, 2024 and most recently on December 19, 2024. It has been associated with 2 failed authentication events affecting 2 messages, representing low but recurring activity. The IP belongs to MSFT (Microsoft Corporation), a network with activity associated with Norway. 8 other IPs in the same /24 subnet (52.101.178.*) also appear in this dataset.
Network Topology
External Reputation Lookups
Look up this IP in external threat intelligence and reputation databases (opens in new tab):
Nearby IPs
Other IPs in the 52.101.178.0/24 range observed failing DMARC:
52.101.178.104 (1 failure), 52.101.178.106 (1 failure), 52.101.178.112 (1 failure), 52.101.178.117 (1 failure), 52.101.178.76 (1 failure), 52.101.178.77 (1 failure), 52.101.178.83 (1 failure), 52.101.178.84 (1 failure)