Network: UK-MICROSOFT-20060601

This page shows DMARC authentication failures originating from the UK-MICROSOFT-20060601 network. Learn more about this data.

Network Information

Owner:: Microsoft
WHOIS Owner:: ORG-MA42-RIPE
Countries:: AU AT CA FR DE HK IN IE JP NO SG ZA KR SE CH NL GB US

Unique IPs:: 1,070

CIDR:: 2a01:111:f400::/40

Analysis

This network has contributed 1,070 unique IP addresses across 6,475 failed authentication events, accounting for 13,416 messages. Activity spans from March 12, 2024 to April 10, 2026, with peak volume in September 2025 (3,443 events). The top countries by failure volume are United States (94%), Japan (2%), Ireland (1%). The most active source IPs from this network include 2a01:111:f403:c112::5 (347 failures), 2a01:111:f403:c110::1 (346 failures), 2a01:111:f403:c001::2 (343 failures). Failures from UK-MICROSOFT-20060601 (Microsoft) span 18 countries with no dominant source, which is consistent with forwarding infrastructure, relay services, or broadly distributed automated activity.

Failures Detected from this Network

Showing 1-50 of 6,475 failures, affecting 13,416 messages

Show Confoundersⓘ

Date ▲	Source IP	Country	Messages
3/12/2024	2a01:111:f400:7e88::206	US	1
3/12/2024	2a01:111:f400:7e88::718	US	1
3/12/2024	2a01:111:f400:7ea9::202	US	1
3/12/2024	2a01:111:f400:7ea9::206	US	1
3/12/2024	2a01:111:f403:200a::700 ⚠	US	1
3/12/2024	2a01:111:f403:240a::701 ⚠	US	1
3/12/2024	2a01:111:f403:2415::701 ⚠	US	1
3/12/2024	2a01:111:f403:2416::700 ⚠	US	1
3/12/2024	2a01:111:f403:2416::701 ⚠	US	1
3/12/2024	2a01:111:f403:31::200 ⚠	US	2
3/12/2024	2a01:111:f403:35::200 ⚠	US	2
3/12/2024	2a01:111:f403:35::201 ⚠	US	1
3/12/2024	2a01:111:f403:36::201 ⚠	US	1
3/12/2024	2a01:111:f403:37::201 ⚠	US	1
3/12/2024	2a01:111:f403:38::200 ⚠	US	1
3/12/2024	2a01:111:f403:38::201 ⚠	US	1
3/12/2024	2a01:111:f403:83b::200 ⚠	US	2
3/12/2024	2a01:111:f403:83d::200 ⚠	US	1
3/12/2024	2a01:111:f403:83e::200 ⚠	US	2
3/12/2024	2a01:111:f403:e002:: ⚠	US	1
4/16/2024	2a01:111:f403:2009::700 ⚠	US	1
4/16/2024	2a01:111:f403:200a::700 ⚠	US	1
4/16/2024	2a01:111:f403:200a::701 ⚠	US	2
4/16/2024	2a01:111:f403:2409::700 ⚠	US	1
4/16/2024	2a01:111:f403:240a::700 ⚠	US	1
4/16/2024	2a01:111:f403:2412::700 ⚠	US	1
4/16/2024	2a01:111:f403:2417::701 ⚠	US	2
4/16/2024	2a01:111:f403:2418::700 ⚠	US	1
4/16/2024	2a01:111:f403:2418::701 ⚠	US	2
4/16/2024	2a01:111:f403:33::201 ⚠	US	1
5/7/2024	2a01:111:f403:5a::200 ⚠	JP	1
5/7/2024	2a01:111:f403:c400::3 ⚠	HK	1
5/9/2024	2a01:111:f400:7ea9::706	US	1
5/9/2024	2a01:111:f403:2009::700 ⚠	US	1
5/9/2024	2a01:111:f403:200a::700 ⚠	US	1
5/9/2024	2a01:111:f403:2407::700 ⚠	US	1
5/9/2024	2a01:111:f403:2408::701 ⚠	US	3
5/9/2024	2a01:111:f403:2412::700 ⚠	US	2
5/9/2024	2a01:111:f403:34::201 ⚠	US	1
5/27/2024	2a01:111:f403:5a::201 ⚠	JP	1
5/27/2024	2a01:111:f403:c400:: ⚠	HK	1
5/30/2024	2a01:111:f400:7e88::723	US	1
5/30/2024	2a01:111:f400:7e88::72a	US	1
5/30/2024	2a01:111:f403:2009::700 ⚠	US	1
5/30/2024	2a01:111:f403:2405::701 ⚠	US	1
5/30/2024	2a01:111:f403:2407::701 ⚠	US	1
5/30/2024	2a01:111:f403:2409::700 ⚠	US	2
5/30/2024	2a01:111:f403:2414::702 ⚠	US	1
5/30/2024	2a01:111:f403:2416::700 ⚠	US	2
5/30/2024	2a01:111:f403:2416::701 ⚠	US	1

Countries