AS5180#255 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)270,848
AS409#256 AFCONC-BLOCK1-AS - Air Force Systems Networking269,312
AS2576#258 DOT-AS - U. S. Department of Transportation268,800
AS1554#259 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)266,496
AS5277#260 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)265,472
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