AS17276 SEI Investments

SEIC-CORP-1 - SEI Investments · registered in the United States

IPv4 addresses2,0483 prefixes · <0.001% of announced IPv4

Rank in United States#6,200largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#22,909of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS17276 in ASN lookup Look up an IP in this network (12.20.48.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

12.20.48.0/23
170.76.224.0/23
206.220.236.0/22

Other ASNs named SEI Investments

1 other network uses the same organisation name; together with AS17276 they announce 2,816 IPv4 addresses.

ASNNameIPv4 addresses

AS14056SEI - SEI Investments US768

Similar-sized networks in United States

ASNNameIPv4 addresses

AS17140#6197 CBRE-US - CBRE, INC.2,048

AS17162#6198 DONALDSON - Donaldson Company, Inc.2,048

AS17270#6199 NYSTRS-AS1 - New York State Teachers' Retirement System2,048

AS17336#6201 GENDYN - General Dynamics2,048

AS18551#6202 ROTHINC - Rothschild & Co US Inc.2,048

AS18554#6203 AGILENT-DFW - Agilent Technologies, Inc.2,048

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