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20.51.221.172

Neutral Activity

Abuse confidence score ?

0% Low Risk

51 reports

4 reporters · latest 5 years ago

ISP	Microsoft Corporation
Usage Type	Data Center/Web Hosting/Transit
ASN	AS8075
Domain Name	microsoft.com
Country	🇺🇸 United States of America
City	Dulles Town Center, Virginia

ISP, Usage Type, and Location provided by IPInfo. Updated weekly.

Report Whois

No reports in the last 60 days

20.51.221.172 has been reported 51 times. The most recent report is from 5 years ago.

The full history is preserved below and remains searchable. A 0% score reflects the absence of recent activity, but this is not a guarantee that earlier reports were invalid. Abuse confidence score decays, naturally, over time, when the abusive activity stops.

IP Abuse Reports for 20.51.221.172

This IP address has been reported a total of 51 times from 4 distinct sources. 20.51.221.172 was first reported on November 25th 2020, and the most recent report was 5 years ago.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇬🇧 33three	2020-12-16 22:02:43 (5 years ago)	SIP:5060 - unauthorized VoIP call to 01146843737925 using	Fraud VoIP
🇺🇸 mc4bbs	2020-12-13 19:51:29 (5 years ago)	[2020-12-13 19:51:17] NOTICE[1230][C-00000257] chan_sip.c: Call from '' (20.51.221.172:58958) to ext ... show more [2020-12-13 19:51:17] NOTICE[1230][C-00000257] chan_sip.c: Call from '' (20.51.221.172:58958) to extension '011400046843737949' rejected because extension not found in context 'public'. [2020-12-13 19:51:17] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T19:51:17.713-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="011400046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/58958",ACLName="no_extension_match" [2020-12-13 19:51:27] NOTICE[1230][C-00000258] chan_sip.c: Call from '' (20.51.221.172:62723) to extension '150046843737925' rejected because extension not found in context 'public'. [2020-12-13 19:51:27] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T19:51:27.562-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="150046843737925",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="I ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 18:10:48 (5 years ago)	[2020-12-13 18:09:49] NOTICE[1230][C-0000023f] chan_sip.c: Call from '' (20.51.221.172:63262) to ext ... show more [2020-12-13 18:09:49] NOTICE[1230][C-0000023f] chan_sip.c: Call from '' (20.51.221.172:63262) to extension '9760046843737919' rejected because extension not found in context 'public'. [2020-12-13 18:09:49] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T18:09:49.380-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="9760046843737919",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/63262",ACLName="no_extension_match" [2020-12-13 18:10:47] NOTICE[1230][C-00000240] chan_sip.c: Call from '' (20.51.221.172:64994) to extension '95446843737925' rejected because extension not found in context 'public'. [2020-12-13 18:10:47] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T18:10:47.515-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="95446843737925",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/ ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 16:29:32 (5 years ago)	[2020-12-13 16:29:17] NOTICE[1230][C-00000211] chan_sip.c: Call from '' (20.51.221.172:54822) to ext ... show more [2020-12-13 16:29:17] NOTICE[1230][C-00000211] chan_sip.c: Call from '' (20.51.221.172:54822) to extension '04600046843737949' rejected because extension not found in context 'public'. [2020-12-13 16:29:17] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T16:29:17.133-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="04600046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/54822",ACLName="no_extension_match" [2020-12-13 16:29:31] NOTICE[1230][C-00000212] chan_sip.c: Call from '' (20.51.221.172:49775) to extension '9480046843737919' rejected because extension not found in context 'public'. [2020-12-13 16:29:31] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T16:29:31.078-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="9480046843737919",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="I ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 14:48:08 (5 years ago)	[2020-12-13 14:46:38] NOTICE[1230][C-000001f7] chan_sip.c: Call from '' (20.51.221.172:64081) to ext ... show more [2020-12-13 14:46:38] NOTICE[1230][C-000001f7] chan_sip.c: Call from '' (20.51.221.172:64081) to extension '8970046843737919' rejected because extension not found in context 'public'. [2020-12-13 14:46:38] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T14:46:38.100-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="8970046843737919",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/64081",ACLName="no_extension_match" [2020-12-13 14:48:02] NOTICE[1230][C-000001fa] chan_sip.c: Call from '' (20.51.221.172:50015) to extension '99100046843737949' rejected because extension not found in context 'public'. [2020-12-13 14:48:02] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T14:48:02.961-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="99100046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress= ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 13:06:32 (5 years ago)	[2020-12-13 13:05:17] NOTICE[1230][C-000001de] chan_sip.c: Call from '' (20.51.221.172:55149) to ext ... show more [2020-12-13 13:05:17] NOTICE[1230][C-000001de] chan_sip.c: Call from '' (20.51.221.172:55149) to extension '94000046843737949' rejected because extension not found in context 'public'. [2020-12-13 13:05:17] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T13:05:17.534-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="94000046843737949",SessionID="0x7f3814022408",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/55149",ACLName="no_extension_match" [2020-12-13 13:06:30] NOTICE[1230][C-000001e2] chan_sip.c: Call from '' (20.51.221.172:55668) to extension '8460046843737919' rejected because extension not found in context 'public'. [2020-12-13 13:06:30] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T13:06:30.773-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="8460046843737919",SessionID="0x7f3814062b78",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress= ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 11:24:38 (5 years ago)	[2020-12-13 11:24:28] NOTICE[1230][C-000001be] chan_sip.c: Call from '' (20.51.221.172:59780) to ext ... show more [2020-12-13 11:24:28] NOTICE[1230][C-000001be] chan_sip.c: Call from '' (20.51.221.172:59780) to extension '89000046843737949' rejected because extension not found in context 'public'. [2020-12-13 11:24:28] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T11:24:28.788-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="89000046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/59780",ACLName="no_extension_match" [2020-12-13 11:24:37] NOTICE[1230][C-000001bf] chan_sip.c: Call from '' (20.51.221.172:62853) to extension '7950046843737919' rejected because extension not found in context 'public'. [2020-12-13 11:24:37] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T11:24:37.951-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="7950046843737919",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress= ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 09:43:53 (5 years ago)	[2020-12-13 09:43:49] NOTICE[1230][C-000001a8] chan_sip.c: Call from '' (20.51.221.172:58982) to ext ... show more [2020-12-13 09:43:49] NOTICE[1230][C-000001a8] chan_sip.c: Call from '' (20.51.221.172:58982) to extension '72446843737925' rejected because extension not found in context 'public'. [2020-12-13 09:43:49] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T09:43:49.027-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="72446843737925",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/58982",ACLName="no_extension_match" [2020-12-13 09:43:51] NOTICE[1230][C-000001a9] chan_sip.c: Call from '' (20.51.221.172:63682) to extension '84000046843737949' rejected because extension not found in context 'public'. [2020-12-13 09:43:51] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T09:43:51.352-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="84000046843737949",SessionID="0x7f3814022408",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 08:02:43 (5 years ago)	[2020-12-13 08:02:33] NOTICE[1230][C-0000018f] chan_sip.c: Call from '' (20.51.221.172:49550) to ext ... show more [2020-12-13 08:02:33] NOTICE[1230][C-0000018f] chan_sip.c: Call from '' (20.51.221.172:49550) to extension '67346843737925' rejected because extension not found in context 'public'. [2020-12-13 08:02:33] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T08:02:33.634-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="67346843737925",SessionID="0x7f3814022408",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/49550",ACLName="no_extension_match" [2020-12-13 08:02:41] NOTICE[1230][C-00000190] chan_sip.c: Call from '' (20.51.221.172:50444) to extension '6940046843737919' rejected because extension not found in context 'public'. [2020-12-13 08:02:41] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T08:02:41.982-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="6940046843737919",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/ ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 06:22:39 (5 years ago)	[2020-12-13 06:22:01] NOTICE[1230][C-00000175] chan_sip.c: Call from '' (20.51.221.172:58747) to ext ... show more [2020-12-13 06:22:01] NOTICE[1230][C-00000175] chan_sip.c: Call from '' (20.51.221.172:58747) to extension '6440046843737919' rejected because extension not found in context 'public'. [2020-12-13 06:22:01] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T06:22:01.586-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="6440046843737919",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/58747",ACLName="no_extension_match" [2020-12-13 06:22:24] NOTICE[1230][C-00000177] chan_sip.c: Call from '' (20.51.221.172:56369) to extension '62446843737925' rejected because extension not found in context 'public'. [2020-12-13 06:22:24] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T06:22:24.346-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="62446843737925",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/ ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 04:41:26 (5 years ago)	[2020-12-13 04:40:06] NOTICE[1230][C-00000159] chan_sip.c: Call from '' (20.51.221.172:49483) to ext ... show more [2020-12-13 04:40:06] NOTICE[1230][C-00000159] chan_sip.c: Call from '' (20.51.221.172:49483) to extension '57346843737925' rejected because extension not found in context 'public'. [2020-12-13 04:40:06] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T04:40:06.327-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="57346843737925",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/49483",ACLName="no_extension_match" [2020-12-13 04:41:24] NOTICE[1230][C-0000015b] chan_sip.c: Call from '' (20.51.221.172:59042) to extension '*5940046843737919' rejected because extension not found in context 'public'. ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 03:00:43 (5 years ago)	[2020-12-13 02:59:43] NOTICE[1230][C-00000142] chan_sip.c: Call from '' (20.51.221.172:56360) to ext ... show more [2020-12-13 02:59:43] NOTICE[1230][C-00000142] chan_sip.c: Call from '' (20.51.221.172:56360) to extension '64100046843737949' rejected because extension not found in context 'public'. [2020-12-13 02:59:43] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T02:59:43.617-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="64100046843737949",SessionID="0x7f381415cb58",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/56360",ACLName="no_extension_match" [2020-12-13 02:59:52] NOTICE[1230][C-00000143] chan_sip.c: Call from '' (20.51.221.172:57797) to extension '52446843737925' rejected because extension not found in context 'public'. [2020-12-13 02:59:52] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T02:59:52.302-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="52446843737925",SessionID="0x7f38140da488",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-13 01:18:13 (5 years ago)	[2020-12-13 01:16:36] NOTICE[1230][C-00000125] chan_sip.c: Call from '' (20.51.221.172:53425) to ext ... show more [2020-12-13 01:16:36] NOTICE[1230][C-00000125] chan_sip.c: Call from '' (20.51.221.172:53425) to extension '59000046843737949' rejected because extension not found in context 'public'. [2020-12-13 01:16:36] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T01:16:36.279-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="59000046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/53425",ACLName="no_extension_match" [2020-12-13 01:18:12] NOTICE[1230][C-00000128] chan_sip.c: Call from '' (20.51.221.172:54312) to extension '47346843737925' rejected because extension not found in context 'public'. [2020-12-13 01:18:12] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-13T01:18:12.318-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="47346843737925",SessionID="0x7f3814022408",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-12 23:36:25 (5 years ago)	[2020-12-12 23:35:54] NOTICE[1230][C-0000010f] chan_sip.c: Call from '' (20.51.221.172:53004) to ext ... show more [2020-12-12 23:35:54] NOTICE[1230][C-0000010f] chan_sip.c: Call from '' (20.51.221.172:53004) to extension '54000046843737949' rejected because extension not found in context 'public'. [2020-12-12 23:35:54] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-12T23:35:54.367-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="54000046843737949",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/53004",ACLName="no_extension_match" [2020-12-12 23:36:24] NOTICE[1230][C-00000110] chan_sip.c: Call from '' (20.51.221.172:57839) to extension '4420046843737919' rejected because extension not found in context 'public'. [2020-12-12 23:36:24] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-12T23:36:24.003-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="4420046843737919",SessionID="0x7f3814070ad8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress= ... show less	Fraud VoIP Hacking
🇺🇸 mc4bbs	2020-12-12 21:54:47 (5 years ago)	[2020-12-12 21:54:45] NOTICE[1230][C-000000f6] chan_sip.c: Call from '' (20.51.221.172:62834) to ext ... show more [2020-12-12 21:54:45] NOTICE[1230][C-000000f6] chan_sip.c: Call from '' (20.51.221.172:62834) to extension '3910046843737919' rejected because extension not found in context 'public'. [2020-12-12 21:54:45] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-12T21:54:45.039-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="3910046843737919",SessionID="0x7f3814060b98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/20.51.221.172/62834",ACLName="no_extension_match" [2020-12-12 21:54:46] NOTICE[1230][C-000000f7] chan_sip.c: Call from '' (20.51.221.172:49974) to extension '37246843737925' rejected because extension not found in context 'public'. [2020-12-12 21:54:46] SECURITY[1251] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-12-12T21:54:46.765-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="37246843737925",SessionID="0x7f3814022408",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/ ... show less	Fraud VoIP Hacking

Showing 1 to 15 of 51 reports

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