AS29899 Geisinger System Services

GEISINGER - Geisinger System Services · registered in the United States

IPv4 addresses65,5367 prefixes · 0.002% of announced IPv4

Rank in United States#1,039largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,948of 79,396 networks with IPv4

IPv6256 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS29899 in ASN lookup Look up an IP in this network (159.240.0.1) All networks in United States

IPv4 prefixes

All 7 prefixes, in address order.

159.240.0.0/17
159.240.128.0/22
159.240.132.0/22
159.240.136.0/21
159.240.144.0/20
159.240.160.0/19
159.240.192.0/18

IPv6 prefixes

All 1 prefix.

2620:112:c000::/40

Other ASNs named Geisinger System Services

1 other network uses the same organisation name; together with AS29899 they announce 66,560 IPv4 addresses.

ASNNameIPv4 addresses

AS22342GCSOM - Geisinger System Services US1,024

Similar-sized networks in United States

ASNNameIPv4 addresses

AS11318#1036 GU - Georgetown University65,536

AS19564#1037 LATECH - Louisiana Tech University65,536

AS27016#1038 NRC-NET - United States Nuclear Regulatory Commission65,536

AS46476#1040 TTUHSC - Texas Tech University Health Sciences Center65,536

AS2936#1041 NERSC - National Energy Research Scientific Computing Center65,536

AS3659#1042 CLAREMONT - Claremont University Consortium65,536

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