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Result filters: AS numbers or (partial) names: Country codes: Only show non-remediated spoofing
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.

SessionTimestamp (UTC)Client IP BlockASNCountryNATOutbound
Private
Status
Outbound
Routable
Status
Adj Spoof
Prefix Len
Results
1593762017-03-05 23:11:3479.127.242.x/249080 (GIN)cze (Czech Republic)yesrewrittenrewrittennoneReport
1574522017-03-02 12:12:23194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1574522017-03-02 12:12:232a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1566732017-03-01 07:23:27185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1563932017-02-28 20:01:16185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1562832017-02-28 16:27:22185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1562232017-02-28 14:29:43185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1561682017-02-28 12:46:28178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
1559092017-02-28 02:12:22185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1555412017-02-27 15:04:46185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1555002017-02-27 13:47:10185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1551222017-02-26 20:22:20185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1541602017-02-25 22:08:48185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1529602017-02-24 18:55:3689.233.181.x/2412767 (PRAGONET-AS)cze (Czech Republic)yesunknownrewrittennoneReport
1519942017-02-23 07:31:32194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1519942017-02-23 07:31:322a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1519802017-02-23 06:57:1178.102.33.x/246830 (LibertyGlobal)cze (Czech Republic)yesrewrittenrewrittennoneReport
1519692017-02-23 06:33:35194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1519692017-02-23 06:33:352a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1516582017-02-22 18:11:04185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1513912017-02-22 07:57:21185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1510752017-02-21 18:39:3783.143.240.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1494562017-02-19 02:22:38185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1484362017-02-17 08:50:0646.36.36.x/2451731 (GTT-AS)cze (Czech Republic)yesunknownunknownnoneReport
1482882017-02-17 02:24:54185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1481042017-02-16 19:33:18185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1478702017-02-16 12:29:58185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1474922017-02-15 22:13:10194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1474922017-02-15 22:13:102a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1465252017-02-14 14:25:5577.240.179.x/2424641 (FASTER-AS)cze (Czech Republic)yesblockedblocked/30Report
1447952017-02-11 16:58:43185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1445922017-02-11 07:47:33185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1443372017-02-10 20:18:1889.238.166.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1440892017-02-10 11:15:52185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1436032017-02-09 16:06:05194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1436032017-02-09 16:06:052a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1434642017-02-09 10:59:3446.36.36.x/2451731 (GTT-AS)cze (Czech Republic)yesunknownunknownnoneReport
1424502017-02-07 19:41:3477.93.208.x/2424971 (MASTER-AS)cze (Czech Republic)yesunknownunknownnoneReport
1422192017-02-07 13:19:1377.240.179.x/2424641 (FASTER-AS)cze (Czech Republic)yesblockedblocked/30Report
1414362017-02-06 15:06:04185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1409402017-02-05 20:33:44185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1408482017-02-05 16:12:22185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1401252017-02-04 08:37:59185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1387852017-02-02 13:51:28194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1387852017-02-02 13:51:282a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1342162017-01-26 12:35:47194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1342162017-01-26 12:35:472a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1341942017-01-26 12:00:5283.143.240.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1341222017-01-26 09:09:24185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1333332017-01-25 01:26:5683.143.240.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1324462017-01-23 20:26:47185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1324162017-01-23 19:43:26185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1324142017-01-23 19:40:16185.76.10.x/2460068 (CDN77)cze (Czech Republic)noblockedblocked/27Report
1321062017-01-19 10:56:24194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1314482017-01-18 11:07:44194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1314482017-01-18 11:07:442a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1309762017-01-17 16:28:0346.13.175.x/2413036 (TMOBILE-CZ)cze (Czech Republic)yesrewrittenrewrittennoneReport
1301282017-01-16 12:11:52178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
1289932017-01-14 10:07:58178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
1269342017-01-11 09:38:29194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1269342017-01-11 09:38:292a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1268732017-01-11 07:32:28194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1268732017-01-11 07:32:282a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1243942017-01-07 02:57:5083.143.240.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1242192017-01-06 20:21:5183.143.240.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1236192017-01-05 19:21:0578.111.121.x/2447232 (ISPAlliance)cze (Czech Republic)yesunknownunknownnoneReport
1226482017-01-04 06:16:31194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1226482017-01-04 06:16:312a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1221532017-01-03 13:47:37194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1221532017-01-03 13:47:372a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1215612017-01-02 08:44:0089.238.166.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1194542016-12-28 21:58:5189.238.166.x/249009 (M247)cze (Czech Republic)yesblockedblockednoneReport
1193052016-12-28 16:38:57178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
1184912016-12-27 12:32:12194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1184912016-12-27 12:32:122a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1163742016-12-22 23:31:3189.176.178.x/246830 (LibertyGlobal)cze (Czech Republic)yesrewrittenrewrittennoneReport
1150572016-12-20 20:33:54185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesunknownunknownnoneReport
1147552016-12-20 11:16:44194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1147552016-12-20 11:16:442a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1136992016-12-18 12:17:02178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
1102742016-12-13 14:00:59185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesunknownunknownnoneReport
1100902016-12-13 07:02:38194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1100902016-12-13 07:02:382a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1056092016-12-06 11:48:46185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1053192016-12-05 22:54:01194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1053192016-12-05 22:54:012a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
1011052016-11-29 10:23:22185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
1008002016-11-28 21:38:17194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
1008002016-11-28 21:38:172a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
980272016-11-24 00:34:39188.175.178.x/2416246 (AS16246)cze (Czech Republic)yesrewrittenblockednoneReport
944592016-11-18 12:00:25185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
943442016-11-18 07:29:00185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
929552016-11-16 16:11:09185.41.141.x/24174 (COGENT-174)cze (Czech Republic)yesblockedblockednoneReport
878352016-11-09 19:19:31194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
878352016-11-09 19:19:312a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
868332016-11-07 18:36:56194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
868332016-11-07 18:36:562a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
862322016-11-05 23:16:1062.84.135.x/245588 (GTSCE)cze (Czech Republic)yesrewrittenrewrittennoneReport
843622016-10-31 17:21:19194.228.20.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
843622016-10-31 17:21:192a00:1028:83xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
827752016-10-27 09:57:47188.175.226.x/2416246 (AS16246)cze (Czech Republic)noblockedblockednoneReport
776732016-10-12 10:31:18185.15.146.x/2444489 (Starnet)cze (Czech Republic)yesrewrittenrewrittennoneReport
760182016-10-07 07:08:3094.142.238.x/2448926 (PE3NY-AS)cze (Czech Republic)yesrewrittenrewrittennoneReport
736192016-09-29 11:42:5791.197.234.x/2460144 (THREE-W-INFRA-AS)cze (Czech Republic)noblockedblocked/26Report
734892016-09-28 21:45:0091.197.234.x/2460144 (THREE-W-INFRA-AS)cze (Czech Republic)noreceivedreceived/8Report
734832016-09-28 21:31:4391.197.234.x/2460144 (THREE-W-INFRA-AS)cze (Czech Republic)noreceivedreceived/8Report
726192016-09-26 18:25:13178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport
715252016-09-23 08:26:0878.128.217.x/242852 (CESNET2)cze (Czech Republic)noblockedblocked/25Report
715252016-09-23 08:26:082001:718:xx::/402852 (CESNET2)cze (Czech Republic)noblockedblockednoneReport
706732016-09-19 14:43:0678.102.106.x/246830 (LibertyGlobal)cze (Czech Republic)yesblockedblockednoneReport
706372016-09-19 11:40:4080.250.11.x/2421430 (WIA-AS)cze (Czech Republic)yesrewrittenrewrittennoneReport
704742016-09-18 12:39:3689.177.99.x/246830 (LibertyGlobal)cze (Czech Republic)yesrewrittenrewrittennoneReport
697962016-09-15 08:12:5580.250.11.x/2421430 (WIA-AS)cze (Czech Republic)yesrewrittenrewrittennoneReport
686982016-09-09 19:24:0190.179.101.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
686982016-09-09 19:24:012a00:1028:96xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
675282016-09-02 08:52:4980.251.250.x/2439235 (DAT-AS)cze (Czech Republic)yesrewrittenrewrittennoneReport
673712016-09-01 10:26:2480.251.249.x/2439235 (DAT-AS)cze (Czech Republic)yesunknownunknownnoneReport
669272016-08-28 16:59:0190.179.101.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
669272016-08-28 16:59:012a00:1028:96xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
667782016-08-27 16:31:3990.179.101.x/245610 (O2-CZECH-REPUBLIC)cze (Czech Republic)yesrewrittenrewrittennoneReport
667782016-08-27 16:31:392a00:1028:96xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
667282016-08-27 11:15:132a00:1028:96xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
665762016-08-26 08:34:142a00:1028:96xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)noblockedblockednoneReport
664382016-08-25 08:53:20178.17.8.x/2450825 (UVT)cze (Czech Republic)yesrewrittenrewrittennoneReport

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