In particular, +Giotsas, Vasileios , introduced by Joe Provo, provided a wonderful RIPE resource which provides convenient API to data from (at least) UCEprotect and SpamHaus, perfectly meeting out current needs: https://stat.ripe.net/docs/data_api#blocklist. 

Let me also use this email to briefly comment on two points from  Matthew Walster's posts; and Matthew, I really come at peace, I have a lot of respect for you and your work, but we can also disagree on some things, right? So: 

1. Matthew's email basically seemed to imply intentional hijacks are not a concern (rare/non-existent?). Few measurement works seem to show the contrary; I esp. recommend the `Profiling BGP serial hijackers' paper from IMC'19 by a team of excellent researchers.

2. A bit off-topic, Matthew's response to Dora Crisan seem to imply BGP eavesdropping for eventual cryptanalysis, possibly using Quantum computing, isn't a concern. On the one hand, I agree that Quantum computing seems still quite far from ability to break state-of-art PKC, and it may long till it becomes practical (if ever). OTOH, it may also not take that long; also, `conventional' cryptanalysis may still happen, e.g., see Schnorr's recent paper, ia.cr/2021/232, which claimed to `destroy' RSA [withdrawn later, so apparently even Schnorr can err - that's part of science - but this doesn't mean next effort won't succeed or that some TLA  (three lettered adversaries) didn't succeed already]. TLAs may have other motivations for eavesdropping, like collecting meta-data. Now, I am sure many customers and providers may not care about security against such TLAs, but I think it is legitimate for some people to be concerned. 

Best, Amir