AS36291 Sanofi

SANOFI - Sanofi · registered in the United States

IPv4 addresses197,88818 prefixes · 0.006% of announced IPv4

Rank in United States#328largest network in US by IPv4 space, of 18,338 · 0.01% of US

Rank worldwide#1,100of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS36291 in ASN lookup Look up an IP in this network (155.65.0.1) All networks in United States

IPv4 prefixes

All 18 prefixes, in address order.

155.65.0.0/17
155.65.128.0/18
155.65.192.0/19
155.65.224.0/20
155.65.240.0/21
155.65.248.0/22
155.65.252.0/22
157.206.0.0/18
157.206.64.0/19
157.206.96.0/21
157.206.104.0/22
157.206.109.0/24
157.206.110.0/23
157.206.112.0/20
157.206.128.0/17
168.124.0.0/16
192.234.110.0/23
205.137.76.0/22

Similar-sized networks in United States

ASNNameIPv4 addresses

AS159#325 OSUNET-AS - Ohio State University198,400

AS7150#326 CUPANET-BLM-AS - Commonwealth University of Pennsylvania198,400

AS11719#327 EATON-CORPORATION - Eaton Corporation198,144

AS11442#329 NCSU - North Carolina State University197,632

AS46#330 RUTGERS - Rutgers, The State University197,632

AS2637#331 GEORGIA-TECH - Georgia Institute of Technology197,376

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