Sorbonne IPRS is an initiative to continuously monitor IP-level routing across the internet. This is done through the regular collection of traceroute-style measurements from multiple vantage points towards a significant portion of the internet’s routable address blocks. The survey is conducted by the Dioptra research group at Sorbonne University’s LIP6 computer science laboratory.

As of December 2024, IPRS provides:

• Four daily IPv4 snapshots featuring multipath route traces from ten vantage points, covering all routable IPv4 /24 prefixes
• One daily IPv6 snapshot with single-path route traces covering a substantial number of prefixes