This IP address has been reported a total of
48
times from
20 distinct
sources.
103.137.72.51 was first reported on
, and the most recent report was
.
In the last 60 days, the top reporter locations were:
Germany
with 4
reports;
Poland
with 4
reports;
Netherlands
with 3
reports.
The most common categories in these recent reports were:
Brute-Force
9
times;
Email Spam
8
times;
Port Scan
3
times.
Recent Reports
We have received reports of abusive activity from this IP address within the last week. It is
potentially still actively engaged in abusive activities.
Failed login attempts against MikroTik RouterOS router, blocked after repeated failures. Offense cou ...
show moreFailed login attempts against MikroTik RouterOS router, blocked after repeated failures. Offense count: 7. Last seen 2026-10-05 14:56 UTC, first seen 2026-06-12 UTC. Automated detection. Follow-up: attacks continued after our previous reports (3 earlier, latest 2026-09-21 19:50 UTC). AS135341 Orange Communication.
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MikroTik RouterOS brute-force: 6 failed login attempts (service). Last seen 2026-09-21 19:01 UTC, fi ...
show moreMikroTik RouterOS brute-force: 6 failed login attempts (service). Last seen 2026-09-21 19:01 UTC, first seen 2026-06-12 UTC. Automated detection. Follow-up: attacks continued after our previous reports (2 earlier, latest 2026-09-11 07:38 UTC). AS135341 Orange Communication.
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MikroTik RouterOS brute-force: 5 failed login attempts (service). Last seen 2026-09-11 07:32 UTC, fi ...
show moreMikroTik RouterOS brute-force: 5 failed login attempts (service). Last seen 2026-09-11 07:32 UTC, first seen 2026-06-12 UTC. Automated detection. Follow-up: attacks continued after our previous report (1 earlier, latest 2026-08-30 02:01 UTC). AS135341 Orange Communication.
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MikroTik RouterOS brute-force: 4 failed login attempts (service). Last seen 2026-08-30 01:30 UTC, fi ...
show moreMikroTik RouterOS brute-force: 4 failed login attempts (service). Last seen 2026-08-30 01:30 UTC, first seen 2026-06-12 UTC. Automated detection. AS135341 Orange Communication.
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2026-08-13T04:09:57.229210+02:00 gollum postfix/smtpd[1652460]: NOQUEUE: reject: RCPT from unknown[1 ...
show more2026-08-13T04:09:57.229210+02:00 gollum postfix/smtpd[1652460]: NOQUEUE: reject: RCPT from unknown[103.137.72.51]: 554 5.7.1 Service unavailable; Client host [103.137.72.51] blocked using zen.spamhaus.org; Listed by PBL, see https://check.spamhaus.org/query/ip/103.137.72.51 / Listed by CSS, see https://check.spamhaus.org/query/ip/103.137.72.51 / Listed by XBL, see https://check.spamhaus.org/query/ip/103.137.72.51; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<170.78.6.233>
...
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