AS53257 The Citadel

ASN1 - The Citadel · registered in the United States

IPv4 addresses61,44021 prefixes · 0.002% of announced IPv4

Rank in United States#1,391largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,623of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS53257 in ASN lookup Look up an IP in this network (155.225.0.1) All networks in United States

IPv4 prefixes

All 21 prefixes, in address order.

155.225.0.0/22
155.225.4.0/23
155.225.7.0/24
155.225.8.0/21
155.225.16.0/20
155.225.32.0/20
155.225.48.0/23
155.225.52.0/22
155.225.56.0/22
155.225.60.0/24
155.225.65.0/24
155.225.66.0/23
155.225.68.0/23
155.225.70.0/24
155.225.72.0/21
155.225.80.0/20
155.225.96.0/19
155.225.128.0/18
155.225.200.0/21
155.225.208.0/20
155.225.224.0/19

Similar-sized networks in United States

ASNNameIPv4 addresses

AS26462#1388 AS-GENESEO - The State University of New York College at Geneseo61,440

AS14921#1389 CENTURYLINK-LEGACY-EMBARQ-HDRV - CenturyLink Communications, LLC61,440

AS15119#1390 SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale61,440

AS55002#1392 DEFENSE-NET - F5, Inc.61,184

AS30641#1393 STATEOFDE - STATE OF DELAWARE61,184

AS36236#1394 NETACTUATE - NetActuate, Inc60,928

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources