AS77 Johns Hopkins University Applied Physics Laboratory

JHUAPL-AS - Johns Hopkins University Applied Physics Laboratory · registered in the United States

IPv4 addresses66,0483 prefixes · 0.002% of announced IPv4

Rank in United States#910largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,722of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS77 in ASN lookup Look up an IP in this network (128.244.0.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

128.244.0.0/16
204.9.128.0/24
204.9.130.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS589#907 UNT - University of North Texas66,048

AS5766#908 IHS-MD-AS - Indian Health Service66,048

AS20452#909 BSU - BALL STATE UNIVERSITY66,048

AS1559#911 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)66,048

AS3482#912 MTSTGOV - State of Montana66,048

AS14822#913 MSKCC - Memorial Sloan-Kettering Cancer Center66,048

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