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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
20693382025-11-27 15:00:265.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20693382025-11-27 15:00:262a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
20653982025-11-20 14:53:195.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20653982025-11-20 14:53:192a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
20653662025-11-20 13:52:325.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20653662025-11-20 13:52:322a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
20381072025-09-29 03:28:175.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20381072025-09-29 03:28:172a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
20339922025-09-22 02:20:145.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20339922025-09-22 02:20:142a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
20299482025-09-15 01:12:185.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20299482025-09-15 01:12:182a05:4140:xx::/400cze (Czech Republic)noreceivedreceived/16Report
20283982025-09-11 15:17:385.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20283912025-09-11 15:14:415.59.249.x/24212271 (C1VFIBER-NET)cze (Czech Republic)noblockedreceived/8Report
20283912025-09-11 15:14:412a05:4140:xx::/40212271 (C1VFIBER-NET)cze (Czech Republic)noreceivedreceived/16Report
19012842025-01-28 15:25:00188.75.159.x/24196735 (AS-JONCZ)cze (Czech Republic)yesrewrittenreceivednoneReport
18627372024-11-17 17:52:14178.255.168.x/2444489 (Starnet)cze (Czech Republic)yesrewrittenreceivednoneReport
18627302024-11-17 17:36:44178.255.168.x/2444489 (Starnet)cze (Czech Republic)yesrewrittenreceivednoneReport
16538322023-10-12 14:41:3480.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
16538322023-10-12 14:41:342a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16538242023-10-12 14:26:5480.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16538242023-10-12 14:26:542a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16538172023-10-12 14:07:5780.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16538172023-10-12 14:07:572a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16538062023-10-12 13:45:0380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16538062023-10-12 13:45:032a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16538012023-10-12 13:37:0980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16538012023-10-12 13:37:092a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16532282023-10-11 14:11:3880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16532282023-10-11 14:11:382a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16494002023-10-04 13:04:5180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
16494002023-10-04 13:04:512a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
16339752023-09-05 06:56:58109.72.3.x/2449767 (INTERNETPB-AS)cze (Czech Republic)yesrewrittenreceived/17Report
14695842022-11-02 09:46:0180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14695842022-11-02 09:46:012a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14695782022-11-02 09:34:0180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14695782022-11-02 09:34:012a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14684862022-10-31 12:48:0380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14671012022-10-28 18:08:0780.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14644902022-10-24 11:41:4280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14548042022-10-11 00:03:3880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14545162022-10-10 13:54:3980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14505082022-10-03 12:48:1780.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14504982022-10-03 12:31:5080.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14504972022-10-03 12:27:2680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14504912022-10-03 12:20:4880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14503922022-10-03 08:12:2380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14491202022-09-30 15:10:3280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14459782022-09-23 12:20:0880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14459212022-09-23 10:40:5480.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14459212022-09-23 10:40:542a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14426332022-09-18 07:18:1580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14416382022-09-16 09:33:4580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14416382022-09-16 09:33:452a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14372442022-09-09 08:27:0480.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14372442022-09-09 08:27:042a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14277382022-08-26 09:08:5880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14256042022-08-23 11:57:4280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14256042022-08-23 11:57:422a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14214052022-08-17 21:59:2880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14197282022-08-16 10:50:5880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14197282022-08-16 10:50:582a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14150382022-08-10 11:14:41188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
14144402022-08-09 09:44:0980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14144402022-08-09 09:44:092a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14116292022-08-03 10:08:13188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
14110442022-08-02 08:37:2580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14110442022-08-02 08:37:252a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14081022022-07-27 09:01:32188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
14074742022-07-26 07:30:4180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14074742022-07-26 07:30:412a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
14069182022-07-25 08:11:1280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
14044342022-07-20 07:54:08188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13996772022-07-13 06:47:48188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13985322022-07-11 08:19:1880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
13973482022-07-08 15:19:4880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
13958732022-07-06 05:41:26188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13935282022-07-01 14:20:5380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
13935122022-07-01 13:41:4280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesreceivedreceived/8Report
13935122022-07-01 13:41:422a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noreceivedreceived/16Report
13925672022-06-29 22:45:5780.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13920412022-06-29 04:35:03188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13863452022-06-22 12:07:5180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13862872022-06-22 10:15:3380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13861552022-06-22 03:28:39188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13852902022-06-20 14:10:5731.7.247.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13824632022-06-15 09:09:1880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13823012022-06-15 02:22:24188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13818662022-06-14 11:00:3580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13817692022-06-14 07:43:4980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13817692022-06-14 07:43:492a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13817542022-06-14 07:01:0680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13807902022-06-12 08:59:0180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13773982022-06-08 01:16:00188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13764472022-06-06 10:36:3980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13764472022-06-06 10:36:392a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13744422022-06-02 07:25:3931.7.247.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13737152022-06-01 00:09:43188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13726892022-05-30 09:29:5580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13726892022-05-30 09:29:552a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13700162022-05-24 23:03:19188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13697232022-05-24 12:28:5180.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13697132022-05-24 12:18:3380.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13673882022-05-19 21:22:0580.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13662922022-05-17 21:57:01188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13658852022-05-17 08:44:4980.250.17.x/2421430 (WIA-AS)cze (Czech Republic)noblockedreceived/8Report
13619392022-05-11 11:59:3680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13619392022-05-11 11:59:362a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13615822022-05-10 20:50:30188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13577202022-05-04 10:52:4980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13577202022-05-04 10:52:492a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13576962022-05-04 09:59:0880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13573542022-05-03 16:49:42188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13541182022-04-27 08:52:2280.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13541182022-04-27 08:52:222a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13527952022-04-22 15:06:5680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13513222022-04-20 00:03:4880.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13507592022-04-19 07:45:2980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13507592022-04-19 07:45:292a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13507372022-04-19 07:05:0780.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13506082022-04-19 01:18:45188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13470712022-04-12 00:12:27188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13426982022-04-06 23:02:0680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13422862022-04-06 08:00:3680.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13422862022-04-06 08:00:362a01:6400:xx::/4021430 (WIA-AS)cze (Czech Republic)noblockedreceived/16Report
13414812022-04-04 23:06:11188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13383682022-03-30 07:32:1980.250.1.x/2421430 (WIA-AS)cze (Czech Republic)yesblockedreceived/8Report
13246862022-03-14 10:45:39188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13207952022-03-07 09:39:19188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13168932022-02-28 01:37:26188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13131912022-02-21 00:30:44188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport
13120062022-02-18 12:33:4545.92.238.x/2444489 (Starnet)cze (Czech Republic)yesreceivedreceived/8Report
13024032022-02-06 12:08:33188.122.201.x/2457728 (HELIOSMB-AS)cze (Czech Republic)yesrewrittenreceivednoneReport

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