AS27 University of Maryland

UMDNET - University of Maryland · registered in the United States

IPv4 addresses133,6324 prefixes · 0.004% of announced IPv4

Rank in United States#458largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#1,468of 79,396 networks with IPv4

IPv66 x /485 prefixes

CountryUnited States18,679 ASNs registered there

Open AS27 in ASN lookup Look up an IP in this network (128.8.0.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

128.8.0.0/16
129.2.0.0/16
192.54.94.0/23
192.54.96.0/21

IPv6 prefixes

All 5 prefixes.

2605:880::/47
2605:880:10::/48
2605:880:20::/48
2605:880:22::/48
2605:880:30::/48

Other ASNs named University of Maryland

1 other network uses the same organisation name; together with AS27 they announce 143,872 IPv4 addresses.

ASNNameIPv4 addresses

AS10886MAX-GIGAPOP - University of Maryland US10,240

Similar-sized networks in United States

ASNNameIPv4 addresses

AS7321#455 LNET-ASN - LocalNet Corporation133,888

AS9#456 CMU-ROUTER - Carnegie Mellon University133,634

AS50#457 ORNL-MSRNET - Oak Ridge National Laboratory133,632

AS18978#459 ENZUINC-US - Enzu Inc133,376

AS111#460 BOSTONU-AS - Boston University133,376

AS3512#461 EUSHC - Emory University133,376

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