The following are snippets of Peering Policy Clauses found in the Peering Rules of the Road - A Brief Study of Peering Policies study.  Clauses were categorized and put into rough categories for comparison.

Here are the clauses we categorized as requirements for minimum # of prefixes or ASes to announce.

Excerpts from Peering Polices

Minimum # of Customer Routes and ASes

1.1.3 Minimum # of routes: Peering Candidate must carry minimum of 250 unique routes in Interconnect routers, and announce consistent routes using BGP4 at all peering locations. – AboveNet Public Peering

Transit Autonomous Systems. The Requestor shall provide transit services to a minimum number of Internet Networks (Autonomous Systems) as follows: 1500 unique transit networks for interconnection with Verizon Business-US; 100 unique transit networks for interconnection with Verizon Business-Europe; and 10 unique transit networks for interconnection with Verizon Business-ASPAC. – Verizon

Transit Autonomous Systems: Interconnection Candidate will provide transit services to at least 500 unique IP Networks/Autonomous Systems. – Qwest