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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
20764162025-12-10 10:29:542001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20592612025-11-08 12:38:382001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
20570982025-11-01 10:36:322001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20570942025-11-01 10:21:362001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/88Report
20531432025-10-25 09:11:472001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20437722025-10-09 08:45:102001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20391282025-09-30 15:51:202001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblockednoneReport
20343832025-09-22 18:06:462001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20342902025-09-22 15:04:372001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblockednoneReport
20217612025-08-31 13:41:552001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20211892025-08-30 05:58:232001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/112Report
20201412025-08-28 10:59:542001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20152222025-08-19 05:22:002001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20093622025-08-08 14:14:592001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
20092872025-08-08 12:11:532001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19958872025-07-15 16:35:132001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19915002025-07-08 04:57:402001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19911712025-07-07 18:18:132001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19853462025-06-26 20:35:112001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/96Report
19814402025-06-19 19:27:092001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/72Report
19682132025-05-26 20:36:552001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19680882025-05-26 17:01:532001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19575292025-05-09 16:03:552001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19574752025-05-09 14:27:242001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblockednoneReport
19561042025-05-07 07:09:012001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19503252025-04-26 04:54:222001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19486822025-04-23 11:16:542001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/104Report
19482702025-04-22 15:33:352001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19431972025-04-12 06:04:262001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/104Report
19416232025-04-09 06:06:172001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19385362025-04-03 13:08:322001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/64Report
19311962025-03-20 21:10:292001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/56Report
19311282025-03-20 18:27:232001:1c00:34xx::/4033915 (TNF-AS)nld (Netherlands)noblockedblocked/72Report

All results shown
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