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Transient Prefix OriginsAnomalous DepeeringsBogus ASNsBogon PrefixesLong/short Prefixes
Start date*    End date*  
Origin AS:  one or multiple ASNs, e.g., 52,7018
Initial bits of prefix:  e.g., 2607:f010::, 2001:478:


Cyclops detects cases where prefixes are announced out of the normal lenghts, i.e. shorter than /8 and longer than /24 for v4 and shorter than /32 and longer than /64 for v6, excluding cases where prefixes are explicited listed by IANA or RIRs. If you are ASN X announcing any of these prefixes, Cyclops will generate an anomaly that you can lookup querying for ASN X.
 Quick lookup
ASN or AS Name:
IP address or DNS name:

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Please send questions/bugs/suggestions to cyclops at 6watch dot net