1. A method for analyzing traffic in a communications network, the method comprising: sampling packet data at a plurality of network interconnection points, wherein the communications network is communicatively coupled to a plurality of autonomous systems by the plurality of network interconnection points; enriching the sampled packet data, wherein enriching the sampled packet data comprises: mapping IP addresses of the sampled packet data to corresponding IP prefixes associated with the plurality of autonomous systems; mapping the IP addresses of the sampled packet data to customers; and generating one or more sampled packet data summaries at a collector node by mapping the sampled packet data to routing table data from communication nodes associated with the collector node; aggregating the enriched sampled packet data to yield aggregated traffic flow measures associated with one or more customers; and generating one or more traffic flow reports based on the sampled packet data, wherein the one or more reports are selected from a group consisting of: a peer distribution report comprising one or more of traffic volume measurements of traffic outbound from a peer network or traffic volume measurements of traffic inbound to the peer network; a customer distribution report comprising one or more of traffic volume measurements of traffic outbound from one or more customer networks or traffic volume measurements of traffic inbound to the one or more of customer networks; an autonomous system distribution report comprising one or more of average traffic volume, traffic volume by region, on-net traffic volume, off-net traffic volume, direction of traffic, next hop autonomous systems, and upstream autonomous systems associated with one or more autonomous systems; an applications report comprising average traffic volume and region to region traffic volume associated with network applications; an on-net distribution report comprising traffic volume measurements of traffic outbound from a peer network that was also inbound to the peer network; an off-net distribution report comprising traffic volume measurements of traffic outbound from a peer network that was not also inbound to the peer network; a region distribution report comprising average traffic volume inbound to or outbound from selected regions; and a city distribution report comprising average traffic volume from one or more source cities to one or more destination cities.