Hi Dmitriy, It looks like this only works for objects directly within the RIPE database, not objects mirrored from RADB. Best regards, Salvador El jue, 16 jul 2026 a la(s) 1:18 a.m., Dmitriy V Menzulskiy ( DmMenzulskiy@beeline.ru) escribió:

Hello !

https://docs.db.ripe.net/Types-of-Queries/Historical-Queries

+ grep

Regards,

Dmitry

*From:* Salvador Bertenbreiter <salvadorb@gmail.com> *Sent:* Thursday, July 16, 2026 2:53 AM *To:* routing-wg@ripe.net *Subject:* [routing-wg] Best source for historical RADB AS-SET data

Hi RIPE Routing-WG, Does anyone know of an easy way to determine *when* a particular ASN was first added to a specific AS-SET in RADB?

More specifically, I am looking for a historical source (besides downloading the entire list of snapshots from ftp.radb.net and comparing) or tool that would allow me to identify the earliest date on which a given ASN appeared as a member of an AS-SET.

Thanks in advance for any suggestions.

Best regards,

Salvador Bertenbreiter

-- Salvador Bertenbreiter (+51) 947 145 352 (+57) 323 802 9009