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Recent tests

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
21358282026-03-27 11:30:252a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21330992026-03-22 18:26:112a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21330452026-03-22 14:55:492a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21316482026-03-19 18:06:122a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21302302026-03-17 05:50:332a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21270332026-03-11 05:54:442a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21266402026-03-10 13:01:282a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21258072026-03-09 06:50:532a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21255152026-03-08 13:46:552a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21207772026-02-27 12:49:022a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21124842026-02-13 06:09:382a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21105632026-02-10 06:36:092a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport
21056552026-02-02 06:25:042a00:102a:50xx::/405610 (O2-CZECH-REPUBLIC)cze (Czech Republic)nounknownunknownnoneReport

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