AS30505 Thomas Jefferson University

TJU-EF - Thomas Jefferson University · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#15,035largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#65,180of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS30505 in ASN lookup Look up an IP in this network (208.103.188.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

208.103.188.0/24

Other ASNs named Thomas Jefferson University

1 other network uses the same organisation name; together with AS30505 they announce 1,536 IPv4 addresses.

ASNNameIPv4 addresses

AS46946TJU-46946 - Thomas Jefferson University US1,280

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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