AS680 153.97.136.0/21 CIDR and IP Range Summary.ASN: 680 - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.Host Count: 2046Addressable IPs: 2048153.97.136.0/24153.97.137.0/24153.97.138.0/24153.97.139.0/24153.97.140.0/24153.97.141.0/24153.97.142.0/24153.97.143.0/24