AS397986 104.254.16.0/21 CIDR and IP Range Summary.ASN: 397986 - Pennsylvania Convention Center AuthorityHost Count: 2046Addressable IPs: 2048104.254.16.0/24104.254.17.0/24104.254.18.0/24104.254.19.0/24104.254.20.0/24104.254.21.0/24104.254.22.0/24104.254.23.0/24