2604:a940:300:5b6:0:13:: was found in our database!
This IP was reported 350 times. Confidence of
Abuse
is 0%: ?
0%
Important Note: Public IPv6 addresses may implement the SLAAC
privacy extension. With this, the interface identifier is randomly generated. The SLAAC
privacy extension also implements a time out, which is configurable, so that the IPv6
interface addresses will be discarded and a new interface identifier is generated.
IP info including ISP, Usage Type, and Location provided
by IPInfo. Updated weekly.
Important Note: 2604:a940:300:5b6:0:13:: is an IP address from within
our whitelist belonging to the subnet
2604:a940:300:5b6::/64,
which we identify as: "Cortex Xpanse".
Whitelisted netblocks are typically owned by trusted entities, such as Google
or Microsoft who may use them for search engine spiders. However, these same entities
sometimes also provide cloud servers and mail services which are easily abused. Pay special
attention when trusting or distrusting these IPs.
This IP address has been reported a total of
350
times from
13 distinct
sources.
2604:a940:300:5b6:0:13:: was first reported on
, and the most recent report was
.
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.
Blocked by UFW (TCP on 50996)
Source port: 52541
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 50996)
Source port: 52541
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8834)
Source port: 53545
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8834)
Source port: 53545
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
SMTP Bruteforce. 2026-08-25T08:18:25.557311+02:00 *.* postfix/submission/smtpd[3278322]: improper co ...
show moreSMTP Bruteforce. 2026-08-25T08:18:25.557311+02:00 *.* postfix/submission/smtpd[3278322]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:13::]: 026003001005306001000005302003003222|020n037324b271v~034t277;{364o335301'25322103052062345rP307255f 256D222222;&#?345:320226216203335247rt;332U257^3334!f271+003367225000032300+300/300,3000314251314250300t300023300n300024023001
show less
Blocked by UFW (TCP on 10000)
Source port: 50493
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 10000)
Source port: 50493
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 8009)
Source port: 52745
Packet length: 60
This report (for 2604:a940:0300:0 ...
show moreBlocked by UFW (TCP on 8009)
Source port: 52745
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 10443)
Source port: 56922
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 10443)
Source port: 56922
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 51007)
Source port: 52910
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 51007)
Source port: 52910
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 25827)
Source port: 54436
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 25827)
Source port: 54436
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 12345)
Source port: 55940
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 12345)
Source port: 55940
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
Blocked by UFW (TCP on 25827)
Source port: 54188
Packet length: 60
This report (for 2604:a940:0300: ...
show moreBlocked by UFW (TCP on 25827)
Source port: 54188
Packet length: 60
This report (for 2604:a940:0300:05b6:0000:0013:0000:0000) was generated by:
https://github.com/sefinek/UFW-AbuseIPDB-Reporter
show less
SMTP Bruteforce. 2026-08-22T10:33:16.243267+02:00 *.* postfix/submission/smtpd[4136281]: improper co ...
show moreSMTP Bruteforce. 2026-08-22T10:33:16.243267+02:00 *.* postfix/submission/smtpd[4136281]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:13::]: 026003001005306001000005302003003N323-k!245027000030242B304|320"373233037#G221333243D4Z321277D355376R 244f205;/v236Q313267257220341^360325001366nSM0010n250344v6!ya8000032300+300/300,3000314251314250300t300023300n300024023001
2026-08-22T10:33:16.802048+02:00 *.* postfix/submission/smtpd[4136281]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:13::]: 026003001000312001000000306003003%G223206F262E#;202222256331{jA373t307354033210]8r20720601667352004000000h314024314023300/300+3000300,300021300a300'300#300023300t300(300$300024300n314025000236000237000g000k00030009000234000235000005000004
show less
Brute-Force
Anonymous
2026-08-22T10:33:10.321285+02:00 mx1 postfix/submission/smtpd[2000756]: improper command pipelining ...
show more2026-08-22T10:33:10.321285+02:00 mx1 postfix/submission/smtpd[2000756]: improper command pipelining after CONNECT from unknown[2604:a940:300:5b6:0:13::]: \026\003\001\005\306\001\000\005\302\003\003?=@\244y\034t\314}\236.{\244\030\232\232QVwL\021\374\255\365g\311\260\033\306\311\204] \254\034\231\274\001R5\257\240n*\341\315\346Q\004B&z"\241\016\357\037P\347\247<\242\v/E\000\032\300+\300/\300,\3000\314\251\314\250\300\t\300\023\300\n\300\024\023\001
show less
Email Spam
Brute-Force
Showing 1 to
15
of 350 reports
Think this IP has been falsely reported? You may request to have the associated
reports reviewed and removed.
Request Takedown ๐ฉ